Turbulent mixing, ignition, and flame stabilization in the non-premixed supersonic hydrogen-air flow is numerically modelled in a near-wall region. Mixing algorithm based on the turbulence approach SARANS (Reynolds Averaged Navier–Stokes equations closed with Spalart–Allmaras turbulence model) with a diffusion model and a detailed kinetic model for hydrogen-air chemical reactions are employed. The system of governing equations that consists of basic conservation laws and the turbulence model equation is solved in a coupled manner with the LU–SGS–GMRES method. The model is applied to simulate the process of hydrogen injection into a M = 2.44 air flow with their subsequent mixing, ignition, and combustion in the Burrows– Kurkov chamber. The results are compared to available experimental and reference computational data. All calculations are carried out on the ‘MVS-10P’ JSCC RAS supercomputer cluster.

中文翻译：

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近壁区域氢-空气超音速混合燃烧模型

在近壁区域中，对非预混合超音速氢气流中的湍流混合，点火和火焰稳定进行了数值模拟。采用了基于湍流方法SARANS（用Spalart-Allmaras湍流模型封闭的雷诺平均Navier-Stokes方程），扩散模型和详细的氢-空气化学反应动力学模型的混合算法。用LU–SGS–GMRES方法耦合求解由基本守恒定律和湍流模型方程组成的控制方程组。该模型用于模拟氢气注入到M = 2.44气流中的过程，以及随后在Burrows–Kurkov室中进行混合，点火和燃烧的过程。将结果与可用的实验和参考计算数据进行比较。