The effect of sinusoidal wall on hydrogen jet mixing rate considering supersonic flow

The efficiency of the scramjet is highly associated with the rate of the mixing through the combustion tank. In current article, simulation approach was used to inspect the effect of the sinusoidal wall on hydrogen mixing cross-flow jet. The key focus of current paper is to exhibit the role of various sinusoidal profiles on the flow structure and streamline pattern of the mainstream and fuel jet. To simulate the flow feature, a 3D model was chosen and Navier-stocks equations were solved with energy and species mass transport equations to evaluate the mixing rate of hydrogen jet. Hydrogen gas is injected through the nozzle in the downstream of the sinusoidal wave. The impact of total jet pressure on the flow feature is exclusively studied. Also, the mixing zones of the various models are compared. Attained results display that the appearance of the wavy wall augments the mixing rate when the frequency of the sinusoidal wave is high enough. Our findings also reveal that using extended surface has less effect in high pressure condition. The comparison of the mixing rate shows that the presence of sinusoidal wavy wall with frequency of 1200 increases the mixing rate more than 25% than simple flat surface. (C) 2019 Elsevier Ltd. All rights reserved.