Wave Rotor Research Group-IUPUI Prediction And Design Of Fuel-Air Mixing in a Combustion Wave Rotor Using Two-Dimensional Unsteady Moving Mesh Flow Computation Arnab Banerjee Mechanical Engineering IUPUI MSME Thesis Presentation Advisor: Prof. Razi Nalim November 27, 2005
Prediction And Design Of Fuel-Air Mixing in a Combustion Wave Rotor Using Two-Dimensional Unsteady Moving Mesh Flow Computation. Arnab Banerjee Mechanical Engineering IUPUI MSME Thesis Presentation Advisor: Prof. Razi Nalim November 27, 2005. - PowerPoint PPT Presentation
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Wave Rotor Research Group-IUPUI
Prediction And Design Of Fuel-Air Mixing in a Combustion Wave Rotor Using Two-Dimensional
Unsteady Moving Mesh Flow Computation
Arnab BanerjeeMechanical Engineering
IUPUI
MSME Thesis PresentationAdvisor: Prof. Razi Nalim
November 27, 2005
Wave Rotor Research Group-IUPUI
Objectives of the present work
• Develop a methodology to study multidimensional effects of wave rotors and apply to NASA four-port pressure exchanger using commercial CFD code
• Predict the fuel-air mixing in an internal combustion wave rotor (ICWR)
• Determine key parameters that affect the fuel-air distribution in a wave rotor and improve understanding to obtain desired fuel distribution
Wave Rotor Research Group-IUPUI
Introduction
• Wave Rotor: A device for energy exchange efficiently within fluids of differing densities by utilizing unsteady wave motion
• Two configurations studied here– NASA four-port pressure exchanger– Internal combustion wave rotor (ICWR)
Wave Rotor Research Group-IUPUI
NASA four-port pressure exchanger
Inlet from the Burner
Inlet from the compressor
Exits to Turbine and Burner
Schematic of a gas turbine topped by a four-port wave rotor
Partially cut away 3D view
• Turbine inlet pressure is 15% -20% more than compressor exit pressure ideally
• Increased overall engine thermal efficiency and specific work
Wave Rotor Research Group-IUPUI
Internal Combustion Wave Rotor (ICWR)
Wave Rotor
Compressor Turbine
Schematic of ICWR
• Constant Volume Combustion
Wave Rotor Research Group-IUPUI
2D & 3D view of wave rotor
Wave Rotor Research Group-IUPUI
Pre- and Post- Processing Package
• Developed in-house by Khalid (2004-05)• Hexagonal unstructured grid• Parametric geometry and grid
– Grid and geometry stored in small portable files– Variable port/rotor channel counts and shape– Tailored grid clustering
• Imports and exports STAR-CD files• 3D and “unwrapped” simultaneous view• Runs easily on laptops (windows)
Wave Rotor Research Group-IUPUI
Results of two grid packages
Star-Design IUPUI in-house code
Wave Rotor Research Group-IUPUI
Past 1-D simulations
Paxson and Nalim 1-D code (1997) Berrak and Nalim Detonation 1-D code (2004)
Wave Rotor Research Group-IUPUI
Past 2-D simulations
Welch (1997) NASA 4-port
Kerem & Nalim (2002) single channel
Piechna et.al (2004) wave rotor
Wave Rotor Research Group-IUPUI
Solution Methodology
• Arbitrary Sliding Interface
• MARS (Monotone Advection Reconstruction Scheme) – 2nd order accurate