Mixing enhancement of multi hydrogen jets through the cavity flameholder with extended pylon
© 2020 IAA The cavity flameholder is the most efficient way for the mixing of the fuel through the supersonic combustion tank. In current article, the impact of the extended strut in the upstream of the chamber flame holder on the mixing efficiency of fuel is comprehensively scrutinized. The present work investigated the hydrogen distribution of the multi-jets in different directions. CFD method is applied for the simulation of the multi-fuel jet at the supersonic free stream with Ma = 4. The effects of free-stream Ma and length of the extended strut on the fuel distribution are also demonstrated. The structure of the fuel jets and air stream entrain to the cavity in various conditions are studied. According to our results, the mixing zone of counter multi jets is larger than co multi-jets. Our outcomes reveal that the extension of the strut to half of the cavity declines the power of the main circulation, and subsequently, the mixing zone is limited. Furthermore, increasing the free-stream Mach intensifies the wake behind the strut, and this enriches the fuel mixing inside the cavity.