New Results in Numerical and Experimental Fluid Mechanics XII

Name: New Results in Numerical and Experimental Fluid Mechanics XII | Contributions to the 21st STAB/DGLR Symposium, Darmstadt, Germany, 2018
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Contributions to the 21st STAB/DGLR Symposium, Darmstadt, Germany, 2018

Andreas Dillmann Gerd Heller Ewald Krämer Claus Wagner Cameron Tropea Suad Jakirlic(Herausgeber*in)

Springer (Verlag)

1. Auflage

Erschienen am 26. September 2019

XVII, 867 Seiten

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Inhalt

Intro
Foreword
Contents
Airplane Aerodynamics/Propulsion Integration
Implementation of a Method to Determine Aerodynamic Propeller-Wing Interaction
1 Introduction
2 Physical Modeling
2.1 Blade Element Momentum Theory
2.2 Slipstream Model
2.3 Vortex Lattice Method
3 Results
3.1 Verification of BEMT and VLM
3.2 Verification of the Combined Method
3.3 Verification of the Propeller-Wing Configuration
4 Conclusion
References
Unsteady Wake and Tailplane Loadspg of the Common Research Model in Low Speed Stall
1 Introduction
2 Computational Setup
2.1 Solver Specifics
2.2 Study Focus and Flow Conditions
3 PIV and Experimental Validation
3.1 Spectral Characteristics in the Wake at Midspan
4 Variation of Flow Conditions
4.1 Angle of Attack Influence
4.2 Tailplane Interaction
5 Conclusion
References
Optimization
Accurate Gradient Computations for Shape Optimization via Discrete Adjoints in CFD-Related Multiphysics Problems
1 Introduction
1.1 Mathematical Formulation of CFD Solvers
1.2 Rewriting J(X) as a Lagrangian
1.3 Automatic Differentiation in Reverse Mode
2 Coupled Simulations
2.1 Basic Terminology of Automatic Differentiation
2.2 Reverse Mode Applied to Multiphysics Drivers
3 A Multiphysics Key Example: Conjugate Heat Transfer
3.1 Heat Equation Discretization
3.2 Heat Transfer Between Fluids and Solids
3.3 Gradient Validation
4 Conclusion
References
Cybermatrix: A Novel Approach to Computationally and Collaboration Intensive Multidisciplinary Optimization for Transport Aircraft Design
1 Introduction
2 The Cybermatrix Protocol
3 Realization on an HPC Cluster
4 An Example Application
5 Conclusion and Outlook
References
Global Aerodynamic Design Optimization via Primal-Dual Aggregation Method
1 Introduction
2 Surrogate Modeling Using Primal and Dual Information
3 The Primal-Dual Aggregation Model
4 Aerodynamic Shape Optimization Results
4.1 Transonic Drag Minimization
4.2 Viscous Drag Minimization
5 Conclusions
References
Turbulence Research and Turbulence Modeling
Validation of a New Near-Wall Reynolds Stress Model for Aeronautical Applications
1 Advanced Low-Reynolds-Number Turbulence Modeling
1.1 Motivation
1.2 Development and Implementation
2 Generic Test Cases
2.1 HGR-01
2.2 Axisymmetric Transonic Bump
2.3 FOR1066 Nacelle
3 Conclusion
References
Development of Artificial Neural Networks with Integrated Conditional Random Fields Capable of Predicting Non-linear Dynamics of the Flow Around Cylinders
1 Introduction
2 Methods
3 Results
4 Conclusion
References
Modification of the SSG/LRR- RSM for Turbulent Boundary Layers at Adverse Pressure Gradient with Separation Using the New DLR VicToria Experiment
1 Introduction
2 Wind-Tunnel Experiment
2.1 Goals and Design of the Experiment
2.2 Experimental Set-Up
2.3 Flow Conditions
2.4 Measurement Technique
3 Experimental Results
3.1 Scaling to Inner Viscous Units
3.2 A Composite Wall Law at Adverse Pressure Gradients
4 RANS Turbulence Modelling
4.1 Modification to Account for the Half-Power Law
4.2 Modification for a Change of the Log-Law Slope
5 Numerical Set-Up
6 Numerical Results
7 Conclusions
References
A Scale-Resolving Elliptic-Relaxation-Based Eddy-Viscosity Model: Development and Validation
1 Introduction
2 Computational Methodology
3 Model Formulation
4 Validation of the -Based RANS Model
4.1 Channel Flow
5 Validation of the Eddy-Resolving -f Model
5.1 Flow Past a Two-Dimensional Fence
5.2 Periodic Flow over a Two-Dimensional Hill
5.3 Impinging Jet
5.4 Flow in a T-Junction
6 Conclusion
References
Development of a Generalized K-? Two-Equation Turbulence Model
Abstract
1 Introduction
2 Formulation of the GEKO Model
3 GEKO Model Versatility
4 Mimicking Other Turbulence Models with GEKO
5 High Lift Airfoil Simulations with GEKO
6 Summary
References
Turbulent Inflow Generation by Resolvent Mode Forcing
1 Introduction
2 Numerical Method
3 Results
4 Conclusions
References
Assessment and Modification of the -Re Transition Model Behavior Outside the Boundary Layer
1 Introduction
2 Problem Description and Modeling Aspects
3 NLF(1)-0416 Airfoil
4 Theoretical Investigations of the Stability Properties
5 Conclusions
References
Assessment of Extensions for an Eddy Viscosity Turbulence Model for Vortical Flows
1 Vortical Flows and Turbulence Model Extensions
1.1 Motivation
1.2 Development and Implementation
2 Generic Test Cases
2.1 Zero Pressure Gradient Flat Plate
2.2 Backward Facing Step
2.3 VFE-2S Delta Wing
3 Conclusion
References
Hypersonic Aerodynamics
Time Response Calibration of Ultra-fast Temperature Sensitive Paints for the Application in High Temperature Hypersonic Flows
Abstract
1 Introduction
2 Prerequisites on TSP for the Application in High Temperature Hypersonic Flows
3 Experimental Apparatus
4 Data Post Processing
5 Results
6 Summary, Conclusion and Outlook
References
Laminar Flow Control and Transition
Surface Temperature Effects on Boundary-Layer Transition at Various Subsonic Mach Numbers and Streamwise Pressure Gradients
Abstract
1 Introduction
2 Experimental Setup and Test Conditions
3 Results and Discussion
4 Conclusion
Acknowledgements
References
Experimental Investigation of the Delay of Gap- and Step-Induced Transition by Means of Suction
1 Introduction
2 Experimental Setup
3 Results
4 Conclusion
References
Boundary Layer Suction Modeling Based on the DLR TAU-Code Effusion Mass Flux Boundary Condition
1 Introduction
1.1 Laminar Flow Control
1.2 Aeroelastic Considerations
1.3 Computational Method
2 Flat Plate Test Case
2.1 Analytical Solution
2.2 Numerical Results
3 Airfoil Test Case
3.1 Test Case Description
3.2 Numerical Results
4 Aeroelastic Test Case
5 Conclusion
References
Laminar to Turbulent Transition at Unsteady Inflow Conditions: Flight Experiments Under Calm and Moderately Turbulent Conditions
1 Introduction
2 Experimental Setup and Post-processing of Data
2.1 Research Aircraft and Flight Experiments
2.2 Wing Glove and Measurement Devices
2.3 Post-processing
3 Results
3.1 Inflow Characteristics
3.2 Impact of the Pressure Gradient on the Transition Location
3.3 Impact of the Turbulence Intensity on the Transition Location
3.4 Comparison with Other Studies and Discussion
4 Conclusions
References
Validation Experiment on a Passive Suction Flap for Hybrid Laminar Flow Control Applications
Abstract
1 Introduction
2 Experimental and Numerical Setup
2.1 Wind Tunnel Model
2.2 Measurement Techniques
2.3 Numerical Setup and Methods
3 Experimental Results and Comparison to CFD
3.1 Surface Pressure Along Centre Line
3.2 Flow Topology Above and Downstream of Flap
3.3 Mass Flow Through Flap
4 Summary and Outlook
References
On the Role of Secondary Structures During Leading Edge Vortex Lift Off and Detachment on a Pitching and Plunging Flat Plate
1 Introduction
2 Experimental Setup
3 Vortex Identification Approaches
4 Results
5 Concluding Remarks
References
Laminar to Turbulent Transition at Unsteady Inflow Conditions: Direct Numerical Simulations with Small Scale Free-Stream Turbulence
1 Introduction
2 Numerical Method
3 Validation for Bypass Transition
4 Application to Airfoil Boundary Layer
4.1 Reference Case
4.2 Simulation with Single Free-Stream Disturbances
4.3 Definition of Spectrum
4.4 Results
5 Conclusions
References
Transition Delay with Cylindrical Roughness Elements in a Laminar Water Channel
1 Introduction
2 Experimental Set-Up
3 Results
4 Concluding Remarks
References
Influence of Jet Spacing and Injection Pressure on Separation Control with Air-Jet Vortex Generators
1 Introduction
2 Flow Facility and Wind Tunnel Model
3 Results and Discussions
3.1 Flow Topology
3.2 Effect of Jet Spacing
3.3 Effect of Plenum Pressure Variation
4 Conclusion
References
Preliminary Study of Flow Control via Uniform Blowing on Airfoils with a Boundary Element Method
1 Introduction
2 Numerical Method
3 Results
4 Conclusion
References
Laminar to Turbulent Transition at Unsteady Inflow Conditions: Wind Tunnel Measurements at Oscillating Inflow Angle
1 Introduction
2 Measurement Setup and Data Acquisition
2.1 Wind Tunnel and Airfoil Model
2.2 Data Acquisition and Processing
2.3 Gust Generation
3 Data Processing
3.1 Transition Detection
3.2 Continuous Wavelet Transform
4 Results and Discussion
4.1 Gust Generator Performance
4.2 Unsteady Surface Pressures and Transition Location
4.3 Velocity of the Transition Front
4.4 Amplification Rates
5 Conclusions
References
Investigations on a Mechanism to Induce Free-Stream Turbulence in a Water Channel by Controlled Injection of Air Bubbles
1 Introduction
2 Experimental Set-Up
3 Results
4 Conclusion
References
Boundary Layer Stability with Embedded Rotating Cylindrical Roughness Element
1 Introduction
2 Numerical Methods
3 Results
3.1 Validation of the Approach with LST
3.2 LST Prediction of the Instability Behind Roughness
3.3 Spatial DNS Simulation of Instability Behind Roughness
4 Conclusions
References
High-Agility Configuration
Application of Lifetime-Based Pressure-Sensitive Paint for Transonic Tests on a Generic Delta Wing Planform
Abstract
1 Introduction
2 Experimental Setup and Acquisition Procedure
2.1 Model and Coating
2.2 Wind Tunnel and PSP Setup
2.3 Data Acquisition and Automation
2.4 PSP Specific Preparation
3 Data Processing
4 Results
4.1 Test Conditions and Data Sets
4.2 RMS Analysis
4.3 Error Analysis
5 Conclusion
References
Vortex Flow Aerodynamic Challenges in the Design Space for Future Fighter Aircraft
Abstract
1 Future Fighter Aircraft - Scenarios and Requirements
2 Vortex Flows - A Design Element for High AOA Flight
2.1 Vortex Flows - Status of Knowledge and Gaps
2.2 Enhancing Aerodynamic Design for Future Fighter Aircraft
2.3 Vortex Interaction Studies for Generic Fighter Aircraft Configurations
3 Summary and Outlook
References
Analysis of Vortex Flow Phenomena on Generic Delta Wing Planforms at Transonic Speeds
Abstract
1 Introduction
2 The Generic Test-Case Model ADS-NA2
3 Experimental Approach
4 Numerical Approach
5 Results
6 Summary and Outlook
References
Magnus Effect for Finned Bodies of Revolution in Supersonic Flow
1 Introduction
2 Investigation Approach
2.1 Geometry
2.2 Experimental Investigation
2.3 Numerical Investigation
3 Results
3.1 Analysis of Total Side Forces and Yawing Moments
3.2 Analysis of Partial Side Force Distributions
3.3 Analysis of Flow Fields and Surface Pressure Distributions
3.4 Analysis of the Yawing Moment Generation
4 Conclusion
References
Analysis of Vortex Flow Phenomena on Generic Delta Wing Planforms at Subsonic Speeds
1 Introduction
2 Vortex Characteristics
3 Configurations
4 Experimental Methods
5 Numerical Methods
6 Results
7 Conclusion
References
Computational Aerodynamic Sensitivity Studies for Generic Delta Wing Planforms
1 Introduction
2 Generic Fighter Configuration
3 Computational Grids
4 Computational and Experimental Approach
5 Computational Results
6 Conclusion
References
Rotorcraft Aerodynamics
Dynamic Stall Computations of Double-Swept Rotor Blades
1 Introduction
2 Numerical Setup
3 Results
4 Conclusion
References
Propeller Blade Shape Optimization with a Hybrid BEMT/CFD Approach
1 Introduction
2 Optimization Tool Chain
3 Optimization Approach
3.1 Optimization Algorithm
3.2 Propeller Design Tool
4 Numerical Setup
4.1 Airfoil Simulation
4.2 Propeller Simulation
5 Results
5.1 Airfoil Optimization
5.2 Propeller Design
6 Conclusion
References
Aerodynamic Analysis and Optimization of Wings and Tail Surfaces of a Compound Helicopter with Box Wing
1 Introduction
2 Toolchain
3 Applications and Results
3.1 Component Interaction Studies
3.2 Optimization of Circulation Distribution
3.3 Evaluation of Flap Efficiency
3.4 Evaluation of Tail Efficiency
4 Conclusion and Outlook
References
Unsteady Boundary Layer Transition Detection with Local Infrared Thermography
1 Introduction
2 Experimental Setup
3 Principle of Local Infrared Thermography
4 Results
5 Conclusions
References
Aerodynamic Performance of Two eVTOL Concepts
Abstract
1 Introduction
2 Methodology
3 Case Studies
3.1 Coax-Quad Configuration
3.2 Octo-Tilt-Wing Configuration
4 Performance Assessment
5 Summary and Conclusions
References
Technical Flows
Experimental Analysis of the Interaction Between a Dual-Bell Nozzle with an External Flow Field Aft of a Backward-Facing Step
1 Introduction
2 Experimental Setup
2.1 BFS Model
2.2 Particle Image Velocimetry
2.3 Schlieren Measurements
3 Results
3.1 Sea Level Mode
3.2 Altitude Mode
3.3 Transition
4 Conclusions
References
Efficient Cooling of a Generic Car Cabin by Novel Ventilation Systems
Abstract
1 Introduction
2 Ventilation Concepts for Car Cabins
3 Experimental Set-up
4 Methodology
4.1 Equivalent Temperature
4.2 Calibration Method for Thermal Manikin
4.3 Heat Flux Characterization
5 Experimental Results
6 Conclusion
References
System Dynamics of a Single-Shaft Turbojet Engine Using Pseudo Bond Graph
1 Introduction
2 Methods
2.1 General Information of the P200SX Turbojet
2.2 Pseudo Bond Graph Theory of a Single-Shaft Turbojet
3 Results and Discussion
3.1 Stationary Operating Point
3.2 Transient Load Case
4 Conclusion and Outlook
References
Towards Aerodynamically Optimized Freight Wagons: An Experimental Study on Container Designs
Abstract
1 Introduction
2 Experimental Setup
3 Wind Tunnel Measurements
4 Conclusion
Acknowledgements
References
Experimental and Numerical Investigation of the Interaction of Wake Vortices with a Gable Roof
1 Introduction
2 Experimental Setup
3 Numerical Setup
4 Results
5 Conclusion and Outlook
References
Numerical Study of the Airflow Distribution in a Passenger Car Cabin Validated with PIV
1 Introduction
2 Experimental Setup
3 Numerical Setup
4 Results
5 Conclusion and Outlook
References
Experimental Study on the Richardson Number Dependence of Large-Scale Flow Structures and Their Dynamics in a Miniaturised Aircraft Cabin
1 Introduction
2 Miniaturised Cabin and Experimental Set-Up
3 Large-Scale Flow Structures and Their Dynamics
4 Conclusions on the Passenger Comfort
References
Aeroelasticity and Structural Dynamics
Sensitivity of Single Degree of Freedom Limit Cycle Flutter of a Laminar Airfoil and Resulting Uncertainties of the Transonic Dip
1 Introduction
2 Overview of the Experimental Setup and Test Procedure
3 Results
3.1 Influence of the Mach Number
3.2 Influence of the Angle of Attack
3.3 Influence of the Boundary Layer
4 Uncertainties of the Transonic Dip and Conclusions
References
Towards CFD-Based Aeroelastic Analysis of NLF Wings
1 Introduction
2 Simulation Set-Up
3 Test Case
4 Validation
5 Results
5.1 2D Wind Tunnel Conditions
5.2 2D Free-Flight Conditions
5.3 3D Free-Flight Conditions
6 Conclusion
References
Experimental Investigation of the Unsteady Aerodynamics of a Pitching S809 Aerofoil at Various Reduced Frequencies and High Reynolds Numbers
1 Introduction
2 Experimental Investigation
3 Measurement Procedure and Data Processing
4 2D Aerofoil Steady and Unsteady Aerodynamic Results
4.1 Aerodynamics of the S809 Aerofoil at Steady Conditions
4.2 S809 Aerofoil Under Harmonic Pitch Motions
5 Discussion
References
Reduced-Order Modeling of Transonic Buffet Aerodynamics
1 Introduction
2 Computational Methods
3 Results
4 Conclusions
References
Fluid and Thermodynamics
Reynolds Number Dependency of the Heat and Mass Transfer in Mixed Convective Duct Flow with Condensation at a Cooled Wall
1 Introduction
2 Experimental Set-Up
3 Numerical Method and Condensation Model
4 Results
4.1 Effect of the Boundary Conditions
4.2 Reynolds Number Dependency of Heat and Mass Transfer
5 Conclusion
References
Experimental Investigation of Mixed Convection in Horizontal Channel Flow in Combination with Cylindrical Roughness Elements
Abstract
1 Introduction
2 Experimental Setup
3 Results
4 Conclusions
References
Comparison of Two Unstable Flow States in Turbulent Mixed Convection
1 Introduction
2 Experimental Set-Up
2.1 Convection Sample
2.2 Temperature Measurements
2.3 Particle Image Velocimetry Set-Up
3 Results and Discussion
3.1 State Characterization Using Temperature Signals
3.2 Stereoscopic PIV Results
4 Conclusion
References
Measurement of the Heat Flux During a Drop Impact onto a Hot Dry Solid Surface Using Infrared Thermal Imaging
1 Introduction
2 Experimental Methods
2.1 Experimental Setup
2.2 Estimation of Contact Temperature and Heat Flux
3 Results and Discussion
3.1 Hydrodynamic and Thermal Effects in Impacting Drops
3.2 Results of the Heat Flux Measurements
4 Summary and Conclusions
References
Numerical Simulation/Aerodynamics
Prediction Capabilities of Two Reynolds Stress Turbulence Models for a Turbulent Wake Subjected to Adverse Pressure Gradient
1 Introduction
2 Test Case and Validation Data
3 RANS Approach
3.1 Numerical Set-Up
3.2 Turbulence Modeling
4 RANS Results
4.1 Meanflow Velocity and Reynolds Stresses
4.2 Equilibrium and Scaling
4.3 Balance Within the Turbulence Kinetic Energy Equation
4.4 Reynolds Stresses
5 Conclusion
References
Multidisciplinary Simulation for Gust Load Alleviation Control Surface Analysis
Abstract
1 Introduction
2 Numerical Methods
2.1 CFD Computational Models
2.2 Structure and Coupling Model
2.3 Process Chain
3 Numerical Results
3.1 General Description of the Gust Characteristic
3.2 Influence of Aileron Deflections
4 Summary and Outlook
Acknowledgment
References
Scrutinizing Conventional and Eddy-Resolving Unsteady RANS Approaches in Computing the Flow and Aeroacoustics Past a Tandem Cylinder
1 Introduction
2 Tandem Cylinder: Case Description
3 Computational Methodology
3.1 Conventional and Eddy-Resolving URANS RSM Models
3.2 Computational Details
3.3 Computational Aeroacoustics Method
4 Results and Discussion
5 Conclusion
References
Towards Higher-Precision Maneuver and Gust Loads Computations of Aircraft: Status of Related Features in the CFD-Based Multidisciplinary Simulation Environment FlowSimulator
1 Introduction
2 Numerical Approach
2.1 Software Integration Framework
2.2 CFD-Flight Mechanics Coupling
2.3 Modeling of Atmospheric Effects
2.4 Modeling of Movables
2.5 Mesh Deformation
2.6 CFD-CSM Coupling
2.7 Trimming
2.8 CFD-CSM-flight Mechanics Coupling
3 Summary and Perspective
References
Boundary Condition Based Actuator Line Model to Simulate the Aerodynamic Interactions at Wingtip Mounted Propellers
1 Introduction
2 Implementation
2.1 Calculation of the Line Positions on the Disk
2.2 Calculation of the Line Loads
2.3 Distribution of the Forces
2.4 Insertion of the Forces into the Flow Field
3 Validation
3.1 Isolated Propeller Simulation (CONF 1)
3.2 Installed Propeller Simulation (CONF 2 and CONF WTP)
3.3 Influence of Model Parameters
3.4 Calculation Time
4 Conclusion
References
Numerical Simulation of Laminar Separation on an Airfoil in Small-Scale Freestream Turbulence
1 Introduction
2 Setup
3 Results
4 Conclusions
References
Capability of RANS Simulations to Reproduce Flat Plate Boundary Layer Interaction with Suction and Oscillatory Blowing
1 Introduction
2 SaOB Actuator and Experimental Setup
3 Computational Approach
4 Results
5 Conclusions
References
Experimental Aerodynamics/Experimental Simulation and Test Techniques
Unsteady Multi-hole Probe Measurements of the Near Wake of a Circular Cylinder at Sub-critical Reynolds Numbers
1 Introduction
2 Measurement Methods
2.1 Unsteady Pressure Probe
2.2 Hot-Wire Probe
3 Experimental Setup
4 Cylinder Wake Measurements: Results and Discussion
4.1 Wake Centerline
4.2 Cross-Stream Profiles
4.3 Velocity Spectra
5 Conclusion
References
Low Aspect Ratio Wing Under Large-Scale Turbulent Inflow Conditions at Low Reynolds Numbers
1 Introduction
2 Experimental Setup
3 Results and Analyses
3.1 Flow Field at Centerline
3.2 Lift and Drag
3.3 Tip Vortex Analysis
4 Conclusion
References
Experimental and Numerical Investigation of 3-D Corner Separation in a Channel Flow with Adverse Pressure Gradient
1 Introduction
2 Experimental Procedure
2.1 Wind Tunnel Facility and Operation Conditions
2.2 Particle Image Velocimetry
2.3 Accuracy Estimation for Velocity and Turbulence Statistics
2.4 Consistency of Turbulence Statistics Near the Flat Wall in Comparison with DNS
3 Numerical Method
4 Mean Flow Field and Comparison of Turbulence Models
5 Conclusions and Outlook
References
Visualization of Near-Wall Structures of an Isolated Cylindrical Roughness Element in a Laminar Boundary Layer Without Pressure Gradient
1 Introduction
2 Experimental Setup
3 Results
3.1 Average Results
3.2 Dynamic Results
4 Conclusions and Outlook
References
Analysis of Model Mount Configurations with Regard to Force Measurements with Transient Inflow
Abstract
1 Introduction
2 Description of the Experimental Setup
2.1 Mechanical Dimensioning of the Model Mount
2.2 Description of the Aerodynamic Test Setup
3 Evaluation of the Two Model Mount Configurations
3.1 Flow Visualizations with Tufts
3.2 Side Force Analysis Under Different Incidence Angles for the Tail Sting
3.3 Side Force Analysis at Different Incidence Angles for the Cross-Stream Rod
4 Conclusion
Acknowledgment
References
The Reynolds-Number Effect on the Steady and Unsteady Aerodynamic Loading on Smooth and Slightly-Rough Square-Section Cylinders with Rounded Corners
1 Introduction
2 Experimental Investigation
3 Results and Discussion
3.1 Influence of Angle of Incidence of the Freestream Velocity Vector
3.2 Effect of a Change in Corner Radius on the Aerodynamic Behaviour of the Cylinder
3.3 Surface Roughness Effects
4 Conclusions
References
Investigation of 3D Coherent Structures in Turbulent Boundary Layers at High Reynolds Numbers Using MultiPulse-STB
1 Introduction
2 Experimental Arrangement
3 Example Results and Discussion
4 Conclusions
References
Experimental Investigationpg of the Influence of Permeabilitypg on Finite Wing Lift and Drag
1 Introduction
2 Analytical Approach
3 Experimental Setup
4 Results
5 Conclusion and Outlook
References
Aeroacoustics
Influence of Flow on Noise Shielding
1 Introduction
2 Test Case Description
3 Numerical Approach
4 Validation of Numerical Approach Against Experiments
5 Evaluation
6 Conclusion
References
Emulation of Sound Pressure Level Spectra Based on Numerical Data
1 Introduction
2 Hybrid Simulation Approach
3 Catalogue of Aeroacoustic Data
4 Emulation Method
5 Representation of Local Conditions
6 Results
7 Summary and Outlook
References
Progress in Helicopter Noise Prediction
1 Introduction
2 Approach
2.1 Method
2.2 Configuration
2.3 Processing
3 Results
3.1 Preparation
3.2 Evaluation
4 Conclusion
References
Design and Construction of a CROR-Model with Aeroacustic Investigation at Different Flight Conditions
1 Introduction
2 Experimental Setup
2.1 Design and Construction of the Model
2.2 Measurement Instrumentation
3 Results
3.1 Measuring Procedure
3.2 Pressure and Acoustics at Different Flight Conditions
4 Conclusion and Outlook
References
Prediction of Trailing-Edge Noise for Separated Turbulent Boundary Layers
1 Introduction
2 Experimental Setup
3 Result
4 Regression Model of the Coherency Spectra
5 Error Analysis
6 Conclusion
References
Vehicle Aerodynamics
Preliminary Investigations on Aerodynamic Vehicle Optimization Using the Adjoint Method with Adjoint Turbulence
Abstract
1 Introduction
2 Equations of State
3 Derivation of the Adjoint Equation System
4 Application
5 Conclusion
References
Aerodynamic Characterisation of a Compact Car Overtaking a Heavy Vehicle*-14pt
1 Introduction
2 Experimental Methods
2.1 Test Site
2.2 Test Vehicles and Measurement Equipment
3 Results
3.1 Characteristic Manoeuvre
3.2 Selected Manoeuvres
4 Conclusions
References
Wind Energy
Computational Study Using DDES with Higher Order Scheme Modeling to Predict Darrieus VAWT Noise Mechanisms
1 Introduction
2 Computational Methods
2.1 CFD and CAA Modeling
2.2 Spatial Discretization
3 Numerical Results
3.1 Turbulence Modeling Approaches
3.2 Darrieus VAWT Noise Mechanisms
4 Conclusion
References
Preliminary Performance Assessment of a Twin-Rotor Horizontal Axis Wind Turbine Using Fast Aerodynamic Methods
1 Introduction
2 Test Case
3 Numerical Methods and Computational Setup
4 Results
4.1 Single Isolated Rotor
4.2 Twin-Rotor
5 Conclusion and Outlook
References
Potential Hazards of Wind Turbine Wake Vortices for Ultra-Light Sports Rotorcraft
Abstract
1 Introduction
2 Technical Approach
3 Results
4 Conclusions
References
Biofluidmechanics
Aerodynamic Investigation of the Free Flapping Flight of a Saker Falcon
1 Introduction
2 Measurement Setup
3 Aerodynamic Analysis
4 Conclusion
References
Analysis of the Effects of MARME Treatment on Respiratory Flow Using the Lattice-Boltzmann Method
1 Introduction
2 Numerical Method
2.1 Geometry Acquisition and Grid Generation
2.2 The Thermal Lattice-Boltzmann Method
3 Results
4 Conclusion and Outlook
References
Author Index

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