Active Flow and Combustion Control 2018

Name: Active Flow and Combustion Control 2018 | Papers Contributed to the Conference "Active Flow and Combustion Control 2018", September 19-21, 2018, Berlin, Germany
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Papers Contributed to the Conference "Active Flow and Combustion Control 2018", September 19-21, 2018, Berlin, Germany

Rudibert King(Herausgeber*in)

Springer (Verlag)

1. Auflage

Erschienen am 3. September 2018

IX, 380 Seiten

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978-3-319-98177-2 (ISBN)

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Intro
Preface
Contents
Part I Active Flow Control
Sparse Model of the Lift Gains of a Circulation Control Wing with Unsteady Coanda Blowing
1 Introduction
2 Experimental Setup
2.1 Model
2.2 Facilities
2.3 High-Speed Proportional Valves
2.4 Instrumentation and Measurement Technique
2.5 Test Cases
3 Methodology
3.1 Identification of Sinusoidal Actuation
3.2 Sparse Modeling of the Lift Gains/Losses
4 Results
4.1 Steady Actuation
4.2 Unsteady Actuation
5 Conclusion
References
Unsteady Roll Moment Control Using Active Flow Control on a Delta Wing
1 Introduction
2 Experimental Setup
2.1 Model and Wind Tunnel
2.2 AFC Actuators as Control Effectors
3 Feedforward Control
4 Model Identification
4.1 Disturbance Model Identification for the Rolling Wing
4.2 Plant Model Identification with Actuation
5 Feedforward Control Results
5.1 Roll Moment Attenuation During Periodic Roll Manuevers
5.2 Roll Moment Attenuation During Pseudo-Random Roll Maneuvers
6 Conclusion
References
Implementing Rotating Stall Control in a Radial Diffuser Using Microjet Arrays
1 Introduction
2 Experimental Hardware and Methods
2.1 Model Details-Radial Diffuser and Compressor
2.2 Physical Mechanism and Implementation of Microjets in Diffuser
2.3 Measurement Techniques
3 Results
3.1 Baseline (Uncontrolled) Flow
3.2 Effect of Microjet Control
4 Conclusion
References
High Frequency Boundary Layer Actuation by Fluidic Oscillators at High Speed Test Conditions
1 Introduction
2 Experimental Setup
2.1 Actuator-Coupled Fluidic Oscillator
2.2 High Speed Cascade Wind Tunnel
2.3 Flat Plate with Pressure Gradient
3 Instrumentation and Data Acquisition
3.1 Surface Pressure Distribution
3.2 Preston Probe Measurements
3.3 Particle Image Velocimetry
3.4 Hot-Wire Boundary Layer Measurements
4 Design Aspects of the Experimental Testbed
4.1 Validation of the Experimental Testbed and Oscillator Integration
4.2 Estimation of Receptivity of the Boundary Layer
4.3 Design of the Fluidic Oscillator
5 Results and Discussion
5.1 Investigated Actuator Operating Points
5.2 High Frequency Pulsed Blowing Boundary Layer Interaction
6 Conclusions and Outlook
References
Model Predictive Control of Ginzburg-Landau Equation
1 Introduction
2 Mathematical Model and System Representation
3 Constraints and Model Predictive Control
4 GL Numerical Simulation with Constrained MPC
5 Conclusions
References
A Qualitative Comparison of Unsteady Operated Compressor Stator Cascades with Active Flow Control
1 Introduction
2 Experimental Setup
2.1 Linear Cascade Setup and Instrumentation
2.2 Annular Cascade Setup and Instrumentation
2.3 Actuator Design for Active Flow Control
3 Results
3.1 Comparative Investigations on the Steady Flow Fields
3.2 Comparative Investigations on the Unsteady Flow Fields
3.3 Comparison of Active Flow Control Results
4 Conclusion
References
Transitioning Plasma Actuators to Flight Applications
1 Introduction
2 Airfoil Risk Reduction Experiments
2.1 Airfoil Design
2.2 DBD Plasma Actuators
2.3 Airfoil Results
3 Preliminary Tail-Panel Experiments
3.1 Experimental Setup
3.2 Preliminary Results and Discussion
4 Concluding Remarks
References
Part II Combustion Control
Effect of the Switching Times on the Operating Behavior of a Shockless Explosion Combustor
1 Introduction
2 Experimental Setup
3 Investigation in the Wastegate Behavior
4 Ignition Timing Measurements
5 Conclusion and Outlook
References
Part Load Control for a Shockless Explosion Combustion Cycle
1 Introduction
2 Simulation of the Shockless Explosion Combustion
3 Part Load of SEC
4 Combustion Control
4.1 Control of the Fuel Stratification
4.2 Control of the Size of the Combustion Region
4.3 Controller Tuning
5 Results
5.1 Control of the Size of the Combustion Region
5.2 Ignition Time Control
5.3 Part Load Aspects
6 Conclusion
References
Knock Control in Shockless Explosion Combustion by Extension of Excitation Time
1 Introduction
2 Numerical Setup and Methods
3 Results
4 Conclusions
References
Reduced Order Modeling for Multi-scale Control of Low Temperature Combustion Engines
1 Introduction
2 Gasoline Controlled Auto-Ignition Model
2.1 Energy Balance
2.2 Mass Balance
2.3 Species Balance
2.4 Heat Release and Fuel Injection
2.5 Wall Heat Loss
2.6 Auxilary Equations
2.7 Model Summary
3 Simulation Results
4 Conclusions
References
Part III Constant Volume Combustion
The Influence of the Initial Temperature on DDT Characteristics in a Valveless PDC
1 Introduction
2 Experimental Setup
2.1 PDC Test Rig
2.2 Measurement Methods
3 Results and Discussion
3.1 Detonation Velocity
3.2 Detonation Cell Width
3.3 Initial Flame Acceleration
4 Conclusion
References
Types of Low Frequency Instabilities in Rotating Detonation Combustors
1 Introduction
2 Experimental Methodology
3 Results and Discussion
3.1 Acoustics-Induced LFI: Spatially Homogenous Oscillations
3.2 Detonation-Induced LFI: Spatially Non-homogenous Oscillations
3.3 Combustion-Induced LFI: Spatially Homogenous
4 Conclusion
References
Influence of Operating Conditions and Residual Burned Gas Properties on Cyclic Operation of Constant-Volume Combustion
1 Introduction
2 Experimental Setup
3 0D Numerical Setup
4 Detailed Analysis on One Operating Point
5 Influence of the Ignition Timing on the Cycle Performances
6 Influence of the Boundary Conditions on Experimental Cycle Performances
7 Conclusion
References
Part IV Data Assimilation and Model Reduction
Validation of Under-Resolved Numerical Simulations of the PDC Exhaust Flow Based on High Speed Schlieren
1 Introduction
2 Governing Equations
2.1 Summary of the Equations in Cartesian Coordinates
2.2 Axi-Symmetric Flows
3 Numerical Methods
4 Experiment: Strong Shock Exiting a Straight Tube
5 The Numerical Setup
6 Results
6.1 Comparison of High-Resolution Runs with the Experiment
6.2 Comparison of Different Coordinate Systems
6.3 Effects of Resolution
7 Conclusion
References
On the Loewner Framework for Model Reduction of Burgers' Equation
1 Introduction
2 The Loewner Framework
2.1 Linear Systems
2.2 Quadratic Bilinear Systems
3 Implementation of the Loewner Framework
4 Application to Burgers' Equation
4.1 Burgers' Equation
4.2 Numerical Results
5 Conclusions and Future Work
References
Model Reduction for a Pulsed Detonation Combuster via Shifted Proper Orthogonal Decomposition
1 Introduction
2 Optimal sPOD Approximation
3 Residual Minimization
4 Algorithm and Implementation
5 Test Case: Pulsed Detonation Combuster
6 Summary and Outlook
References
Part V Numerical Aspects in Combustion
Control of Condensed-Phase Explosive Behaviour by Means of Cavities and Solid Particles
1 Introduction
2 Mathematical Models
3 Results
3.1 Single PMMA Bead
3.2 2times2 Matrix of Air Cavities
3.3 2times2 Matrix of PMMA Beads
3.4 Combination of 2 Cavities and 2 Beads
3.5 Analysis of the Temperature Field
4 Conclusion
References
An Open and Parallel Multiresolution Framework Using Block-Based Adaptive Grids
1 Introduction
2 Code Structure
2.1 Multiresolution Algorithm
2.2 Block- and Grid Definition
2.3 Refinement/Coarsening of Blocks
2.4 Data Structure
2.5 Parallel Implementation
3 Advection Test Case
4 Navier-Stokes Test Case
5 Conclusions and Perspectives
References
A 1D Multi-Tube Code for the Shockless Explosion Combustion
1 Introduction
2 Implementation
2.1 One-Dimensional Model and Single-Tube Reference Operation
2.2 Modelling Lateral Inflow and Outflow
2.3 Reduced Chemical Model for SEC Simulations
3 Results from Numerical Tests
3.1 Plenum Radius
3.2 Length of Plenum
3.3 Positioning of SEC Tubes Along the Plenum
3.4 Interrupted Fuel Pipeline
4 Conclusion and Outlook
References
Part VI Unsteady Cooling
Experimental Study on the Alteration of Cooling Effectivity Through Excitation-Frequency Variation Within an Impingement Jet Array with Side-Wall Induced Crossflow
1 Introduction
2 Experimental Setup
3 Results
4 Conclusion
References
Effects of Wall Curvature on the Dynamics of an Impinging Jet and Resulting Heat Transfer
1 Introduction
2 Computational Details
2.1 Numerical Methods
2.2 Computational Setup
3 Results and Discussion
4 Conclusions
References
Map Estimation for Impingement Cooling with a Fast Extremum Seeking Algorithm
1 Introduction
2 Experimental Setup
3 Concept
4 Results
5 Conclusion
References
Author Index

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