Investigation of Mixing and Flow Characteristics in a Dual-Mode Combustor

Abstract

A numerical study is conducted to investigate the mixing, combustion, and flow characteristics of a dual-mode scramjet-combustor configuration. A three-dimensional model for the combustors has been used. Numerical results are obtained using a finite volume CFD code with unstructured grids. Hydrogen fuel is injected through a single unswept wall-mounted ramp parallel to the airstream. The effects of the combustor length and the equivalence ratio are studied. Results show that improved combustion efficiency is obtained by increasing the length of the combustor. Also, the change in the equivalence ratio by 10 % slightly affects the combustion efficiency near the end of the combustor duct.