Proceedings of the 9th Asian Joint Workshop on Thermophysics and Fluid Science, 27–30 November 2022, Utsunomiya, Japan: Asian Research in Thermal and ... (Springer Proceedings in Physics, 396)

This book is a collection of the best peer-reviewed papers presented at the ninth Asian joint workshop on thermophysics and fluid science organized in Utsunomiya, Japan, in November 2022. The book is a valuable addition to the conference series started in the year 2006, with contents that include the research outputs from Asian countries―India, China, Japan, and the Republic of Korea. Some of the papers are collaborative efforts by academicians from these countries. The book provides an overview of recent research in the fields of fluid and thermal engineering. The chapters in the book deal with research problems on aerodynamics, propulsion, transonic and supersonic flows, aero-acoustics, fluid dynamics, thermodynamics, combustion, heat and mass transfer, and turbomachinery. Analytical, experimental, and numerical approaches are employed in the chapters. This volume will benefit academicians, researchers, and students working on research problems in thermal and fluid sciences. Foreword Preface Contents Editors and Contributors 1 Effect of Multi-Layered Piezo Ceramic Actuator on Transonic Flow 1.1 Introduction 1.2 Experimental Apparatus and Method 1.2.1 Wind Tunnel Facility 1.3 Equations 1.4 Results and Discussion 1.4.1 Shock Wave Positions 1.4.2 Pressure Fluctuation and Frequency Analysis 1.5 Conclusion and Future Work References 2 Numerical Simulation for Prediction of Secondary Droplets by Water Droplet Impingement on Thin Water Film Using E-MPS Method 2.1 Introduction 2.2 Numerical Method 2.3 Numerical Condition 2.4 Numerical Results and Discussion 2.4.1 Vertical Impact 2.4.2 Oblique Impact 2.5 Concluding Remarks References 3 Experimental Observation of Collision Process Between Converging Shock Wave and Supersonic Jet 3.1 Introduction 3.2 Experimental Method 3.3 Results and Discussion 3.4 Conclusion References 4 Reduction of Aerodynamic Noise Radiated from Multicopter 4.1 Introduction 4.2 Experimental Apparatus and Procedure 4.2.1 Field Experiment 4.2.2 Experimental Apparatus 4.3 Results and Discussion 4.4 Conclusions References 5 Hydrodynamics of a Partially Slipping Circular Cylinder in a Uniform Flow 5.1 Introduction 5.2 Numerical Methodology 5.2.1 Governing Equations and Modelling 5.2.2 Validation 5.3 Results and Discussion 5.3.1 Flow Separation Over Asymmetric- Partially Spanned Slip-On Cylinder Surface 5.3.2 Effects on Coefficient of Lift 5.3.3 Effects on Coefficient of Drag 5.3.4 Discussions on Flow Instabilities 5.4 Conclusion and Future Work References 6 Effects of Salinity on Carbon Dioxide Microbubble Dissolution into Water 6.1 Introduction 6.2 Experiments 6.3 Results and Discussion 6.4 Conclusions References 7 Numerical Analysis of High-Speed Flow Around a Double-Delta Wing 7.1 Intoroduction 7.2 Numerical Model and Computational Methods 7.3 Results and Discussion 7.4 Conclusions References 8 Investigation of Cavitation Evolution Through a Butterfly Valve Model at Different Valve Opening Degrees 8.1 Introduction 8.2 Computation Model and Numerical Validation 8.2.1 Computation Domain and Boundary Conditions 8.2.2 Numerical Methods 8.2.3 Validation 8.3 Conclusions and Discussion 8.3.1 Cavitation Distribution 8.3.2 Characteristics of Cavitation Evolution 8.3.3 Correlation Between Cavitation and Vortex 8.4 Conclusion References 9 Numerical Investigation of Cavitating Flow Around a Hydrofoil Considering Advection–Diffusion and Precipitation of Dissolved Gas in Liquid 9.1 Introduction 9.2 Numerical Methods 9.2.1 Governing Equations with Cavitation Model 9.2.2 Computational Setup 9.3 Results and Discussion 9.4 Conclusion References 10 A Brief Review on the Advances of Passive Strut Combustors 10.1 Introduction 10.2 Three Strut Configurations 10.3 Shock-Inducing Passive Struts 10.4 Pressure-Inducing Passive Struts 10.5 Conclusion References 11 Relation Between Cellular Structure of Underexpanded Radial Jet and Curvature Effect of Slit Nozzle 11.1 Introduction 11.2 Computational Model for Underexpanded Radial Jet 11.3 Results and Discussion 11.3.1 Cellular Structure of Radial Jet 11.3.2 The Oscillation of Radial Jet 11.4 Conclusion References 12 Investigation of Flow and Fuel/Air Mixing in a Heavy-Duty Gas Turbine DLN Combustor Using Laser Diagnostics and Numerical Simulation 12.1 Introduction 12.2 Method 12.3 Results and Discussion 12.4 Conclusion References 13 Measurement of Fluid Friction Acting on Flat Plate 13.1 Introduction 13.2 Oil Film Interferometry 13.3 Experimental Equipment and Methods 13.3.1 Experimental Equipment 13.3.2 Experimental Equipment 13.4 Results of Experiments 13.5 Conclusion References 14 Application of Pressure-Sensitive Paint Measurement Technology in Pressure Measurement of Cascade Blade Surface 14.1 Introduction 14.2 Experimental Subjects 14.2.1 Test Linear Cascade 14.3 Experimental Method 14.3.1 Linear Cascade Tunnel and Measurement System 14.3.2 PSP Measurement System and Paint 14.4 Experimental Scheme 14.4.1 Optical Arrangement Layout 14.4.2 Experimental Conditions and Parameter Settings 14.5 Results and Discussion 14.5.1 Original PSP Image Analysis 14.5.2 PSP Versus Pressure Tap Data 14.5.3 Impact of Incidence on Cascade Flow 14.5.4 Impact of Mach Number on Cascade Flow 14.6 Conclusion and Future Work References 15 A Study on Underexpanded Radial Jet Impinging on Cylindrical Inner Wall 15.1 Introduction 15.2 Experimental Considerations 15.2.1 Piping System and Visualization 15.2.2 Strain Measurement and Experimental Device 15.3 Visualization 15.4 Strain 15.4.1 FFT Analysis 15.4.2 Phase Difference Analysis 15.5 Conclusions References 16 Fluctuation of Force Acting on Flat Plate by Underexpanded-Jet Impingement 16.1 Introduction 16.2 Experimental Considerations 16.3 Experimental Results and Discussion 16.3.1 Dominant Frequency 16.3.2 Jet Oscillation Measurements 16.4 Conclusions References 17 Pressure Pulse Wave Model for Continuous Arterial Blood Pressure Approximation 17.1 Introduction 17.2 Methods 17.2.1 Feature Extraction 17.2.2 Multi-variable Linear Regression Model 17.3 Result 17.4 Conclusion References 18 Development of Virtual Optical Waveguide: Effect of Flatness Ratio of Open Elliptical on High-Pressure Area by 3D Numerical Calculation 18.1 Introduction 18.2 Numerical Procedure and Boundary Conditions 18.3 Result and Discussion 18.3.1 Modeling Initial Pressure by 3D Gaussian Distribution 18.3.2 Effect of Flatness Ratio on Shock Wave Propagation 18.4 Conclusion References 19 Experimental Investigation on Self-propulsion of Leidenfrost Droplets on Narrow Ratchet Surfaces 19.1 Introduction 19.2 Theory 19.3 Methodology 19.4 Results and Discussions 19.5 Conclusions and Future Scope References 20 Low-Dimensional Dynamic Representation of Unsteady Flow Using Convolutional Neural Network 20.1 Introduction 20.2 Method 20.2.1 Training Data 20.2.2 Problem Setting of Training and Reconstruction 20.2.3 Deep Learning Model 20.3 Results 20.4 Conclusion References 21 Active Wake Control of a Bluff Body Using Incompressible Numerical Simulations 21.1 Introduction 21.2 Literature 21.3 Methodology 21.3.1 Flow Domain 21.3.2 Mesh 21.3.3 Initial and Boundary Conditions 21.3.4 Numerical Scheme 21.4 Validation 21.5 Results and Discussion 21.5.1 Vorticity Contours 21.5.2 Dynamic Mode Decomposition (DMD) 21.6 Conclusion References 22 Effect of Bowed Stator Blade on Aerodynamic Performance of Low-Speed Single-Stage Axial Compressor 22.1 Introduction 22.2 Test Compressors 22.3 Computational Method and Condition 22.4 Results and Discussion 22.4.1 Overall Performances 22.4.2 Flow Field and Loss Generation 22.5 Conclusions References 23 Effects of Model Shape of Hemispheric-Head Cyclone Separator on Collection Performance 23.1 Introduction 23.2 Numerical Analysis 23.2.1 Test Model 23.2.2 Numerical Procedures 23.3 Results and Discussion 23.3.1 Effect of Inlet Pipe Diameter 23.3.2 Effect of Inlet Pipe Diameter 23.3.3 Effect of Inlet Tube Height 23.3.4 Effect of Conical Length 23.3.5 Composite Model 23.4 Conclusion References 24 Wind Tunnel Experiments on Interaction Between Three Vertical-Axis Wind Turbines Arranged in Tandem 24.1 Introduction 24.2 Methods 24.2.1 Configuration of Flow Field 24.2.2 Tandem Layouts of a Trio of Vertical-Axis Wind Turbines 24.3 Results and Discussion 24.3.1 Rotational Speeds of a Trio of VAWTs in Tandem Layouts 24.3.2 Power of a Trio of VAWTs in Tandem Layouts 24.4 Conclusions References 25 Comparative Study of the Reanalysis and Instrument Data for Wind Energy Potential Assessment of Southwest Region in India 25.1 Introduction 25.2 Methods and Materials 25.2.1 ERA5 25.2.2 MERRA-2 25.2.3 Instrument Data 25.2.4 Location of the Study 25.3 Results and Discussion 25.3.1 Wind Data 25.3.2 Wind Rose Diagram 25.3.3 Hourly Wind Distribution—Reanalysis Versus Instrument 25.4 Conclusion and Future Work References 26 Proposal of Design Method for Large Tidal Current Turbine Incorporating Cavitation Occurrence 26.1 Introduction 26.2 Turbine Design Method 26.2.1 BEM Theory 26.2.2 Incorporation of Cavitation Limits into BEM Theory 26.2.3 CFD Method for Cavitation Limits 26.3 Designed Turbines and Comparison Performances 26.4 Conclusion and Future Work References 27 Analysis of Parabolic Trough Collector Performance Enhancement Using Nanofluids 27.1 Introduction 27.2 Numerical/Experimental Studies 27.3 Model Description 27.4 Governing Equations 27.5 Results 27.6 Conclusion and Future Work References 28 Thermal In-Orbit Performance and Evaluation of Multi-Staged Passive Radiant Cooler with Sun-Shield Configuration Variation 28.1 Introduction 28.2 Thermal Performance Evaluation of Multi-Staged Passive Radiant Cooler 28.2.1 Numerical Model and Solution Methodology 28.2.2 In-Orbit Performance Benchmark 28.3 Influence of Sun-Shield Opening Angle and Improved Design 28.3.1 Radiant Cooler Operation with Sun-Shield Opening Angle Variation. 28.3.2 Un-Symmetrical Sun-Shield Design 28.3.3 Do-Decagon Sun-Shield Design 28.4 Conclusion and Future Work References 29 Influence of Structural Parameters of Catalyst Support on Hydrogen Production Performance of Diesel Reforming 29.1 Introduction 29.2 Establishment of Numerical Models 29.2.1 Physical and Mathematical Models 29.2.2 Kinetic Equations 29.2.3 Mesh-Independent Validation 29.3 Experimental Study on Hydrogen Production by Steam Reforming 29.3.1 Design of Experimental Platform 29.3.2 Analysis of Hydrogen Production Experiment Results 29.4 Analysis of Results Based on Numerical Simulations 29.4.1 Experimental Verification 29.4.2 Analysis of Hydrogen Production Performance of Honeycomb Ceramic Carriers with Different Mesh Size 29.4.3 Analysis of Hydrogen Production Performance of Honeycomb Ceramic Carriers with Different Structural Parameters 29.5 Conclusion References 30 Gasifier for Plastic Waste Using High-Temperature Superheated Steam 30.1 Introduction 30.2 Experimental Method 30.3 Results and Discussion 30.3.1 Relationship Between Superheated Steam Temperature and Composition of Generated Gas 30.3.2 Relationship Between Sample Feed Rate, Generated Gas Amount, and Carbon Conversion Rate 30.3.3 Relationship Between S/C and Composition of Generated Gas 30.3.4 Generated Gas Energy 30.4 Conclusions and Future Work Reference 31 Energy Efficient Drive for a Single-Phase Induction Motor Based on THD 31.1 Introduction 31.2 Types of One Phase Induction Motor Drives 31.2.1 One Phase AC-AC Chopper Drives 31.2.2 One Phase PWM Inverter with Full Bridge Rectifier Drives 31.2.3 Single Phase PWM Inverter with Half Bridge Rectifier Drives 31.3 Results 31.4 Conclusion References 32 Aerospike Nozzles for Reusable Launch Vehicles: Prospects and Possibilities 32.1 Introduction 32.2 Flow-Field in Full Length and Truncated Plugs 32.3 Effects of Base Bleed on Improving the Thrust 32.4 Aerospike Engines During Retro-Propulsion 32.5 Conclusion References