Numerical Investigation of an Axisymmetric Model Scramjet Assisted with Cavity of Different Aft Wall Angles

An axisymmetric model scramjet assisted with cavity flameholder is numerically investigated. Three-dimensional Reynolds-averaged Navier-Stokes simulation carried out to reveal the fuel mixing and combustion characteristics. The results show reasonable agreements experimental data. analysis indicates that rectangular has some similarities shear layer in nonreacting flow field. configuration of changes hugely due significant chemical reaction heat release reacting Typically, two more configurations different aft wall angles are compared optimize cavity. When angle small, bends floor enters into stays cavity, which poor performance. With increase angle, distributes uniformly efficiency improves. In field, volume full hot products free radicals increases while interaction between main decreases angle. improved shows larger weighs than reduced flow. violent case a Therefore, proper beneficial performance cavity-assisted when designing flameholder.