Proceedings of the
International Conference on Mechanical Engineering 2009
(ICME2009) 26- 28 December 2009, Dhaka, Bangladesh

ICME09-FM-32

NUMERICAL STUDY ON MIXING FLOW FIELD WITH
DIFFERENT ANGLES INTO A SUPERSONIC FLOW

Rafiqul Hoque1, Mohammad Ali2 and Quamrul Islam2
1Institute of Information and Communication Technology, BUET, Dhaka, Bangladesh
2Department of Mechanical Engineering, BUET, Dhaka, Bangladesh

ABSTRACT

This paper investigates the performance of fuel combustion with the help of computer based simulation system. The simulation is carried out using huge volume of data analysis. A numerical study on mixing of hydrogen injected into a supersonic air stream has been performed by solving Two-Dimensional full Navier-Stokes equations. An explicit Harten-Yee Non-MUSCL Modified-flux-type TVD scheme has been used to solve the system of equations, and a zero-equation algebraic turbulence model to calculate the eddy iscosity coefficient. The main objectives of this study are to increase the mixing efficiency and the flame holding capability of a supersonic combustor. The performance of combustor has been investigated by varying the injection angle, keeping constant the backward-facing step height and other calculation parameters. The investigation shows that, small and large injecting angles increase the flame holding capability but mixing efficiency is poor. For moderate injecting angle, the configuration might act as a good flame holder and become efficient in mixing.
 

Keywords: Navier-Stokes Equations, Flame, Mixing Efficiency, Mach no.

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