摘要
The two-dimensional Reynolds-Averaged Navier–Stokes (RANS) equations coupled with the two equation Shear stress transport k–ω turbulence model as well as the finite-rate/eddy–dissipation reaction model have been employed to numerically simulate the flow field structures in a typical two-strut based scramjet combustor. Here all the computations have been performed by using ANSYS 14-FLUENT code. Additionally, validation has been completed for the single strut scramjet engine by comparing its outcome with the open, experimental data. The computational results show reasonable agreement with the experimental schlieren image, and the velocity, pressure and temperature variation graph available in the open literature. The introduction of two-strut improves the combustion and mixing efficiency of the combustor appreciably when compared with single strut engine. Further, investigations have been carried out on the effect of different strut + wall injector on the combustion as well mixing performance of two-strut scramjet combustor. The obtained results show that the combination of two-strut + wall 1 + wall 2 injectors provide better air–H2 mixing as they lead to a higher penetration depth out of the other strut + wall injection techniques. Thus the combustion as well as mixing efficiency of two-strut + wall 1 + wall 2 injection technique is found to be higher as compared to remaining strut + wall injection techniques but lower than that of the two-strut injection.
摘要译文
ort k鈥湍流模型以及有限速度/涡流 - 反向释放反应模型已被用于数值模拟典型的两支架基于喷气式燃烧器的流场结构这里所有的计算都是通过使用ANSYS 14-FLUENT代码进行的。另外，通过将其结果与开放式，实验数据计算结果与实验图像吻合，速度，压力和温度变化图在开放式文献中可用与单支柱发动机相比，双支柱的引入提高了燃烧器的燃烧和混合效率。此外，对不同支柱+壁式喷射器对燃烧的影响以及双支柱喷气式燃烧器的混合性能进行了调查结果表明，双支柱+壁1 +壁2注射器的组合提供了更好的空气混合，因为它们导致了另一个支柱+壁注射技术中较高的穿透深度发现双柱+壁1 +壁2注射技术的混合效率比剩余支柱+壁注射技术高，但低于双支柱注射液的混合效率
Gautam Choubey; K.M. Pandey. Effect of different strut + wall injection techniques on the performance of two-strut scramjet combustor[J]. International Journal of Hydrogen Energy, 2017,42(18): 13259–13275