Three-dimensional numerical simulation of a transverse hydrogen jet blowing into a duct with a supersonic flow of air (warmed by a fire heater) has been carried out. The study is based on experimental data obtained at the ONERA-LAERTE facility. The RANS equations for the reacting gas were solved, closed by the SST model and various kinetic mechanisms of hydrogen combustion in air. The channel wall roughness was taken into account in this model. The dependence of the flow characteristics on such physical factors as the shape of the fuel injector channel, the effective roughness height, and various methods of describing molecular diffusion has been studied. It has been established that the equivalent diameter of a grain of sand has a significant influence on the longitudinal pressure distribution in the duct. The influence of chemical kinetics on the flow structure in separation zones within the duct is demonstrated.

已经对用超音速空气流（由火焰加热器加热）吹入管道的横向氢气射流进行了三维数值模拟。该研究基于 ONERA-LAERTE 设施获得的实验数据。通过 SST 模型和氢气在空气中燃烧的各种动力学机制求解并封闭了反应气体的 RANS 方程。该模型考虑了通道壁粗糙度。已经研究了流动特性对诸如燃料喷射器通道的形状、有效粗糙度高度以及描述分子扩散的各种方法等物理因素的依赖性。已经确定，沙粒的当量直径对管道中的纵向压力分布具有显着影响。演示了化学动力学对管道内分离区域的流动结构的影响。