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NUMERICAL MODELING OF SUPERSONIC COMBUSTION OF HYDROGEN IN THE WAKE REGION OF A STRUT

机译:竖管尾流区氢超音速燃烧的数值模拟

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摘要

Numerical modeling of combustion of a sonic hydrogen stream injected into a supersonic stream of air using a strut is presented. Results are obtained by numerically solving unsteady, compressible, turbulent Navier-Stokes equations, using Unstructured Finite Volume Method (UFVM) incorporating RNG based k-ε two equation model and time integration using three stage Runge Kutta method. Reaction is modeled using an eight step H_2-air chemistry. The developed numerical procedure is based on the implicit treatment of chemical source terms by preconditioning and solved along with unsteady turbulent Navier Stokes equations explicitly. Code is validated against a standard wall jet experimental data and is successfully used to model the reacting flow field resulting due to combustion of hydrogen in the wake region of strut placed in heated supersonic air stream.
机译:提出了使用支柱将注入到超声速空气流中的声氢流燃烧的数值模型。通过使用结合基于RNG的k-ε两个方程模型的非结构有限体积法(UFVM)和使用三阶段Runge Kutta方法的时间积分,通过数值求解不稳定,可压缩,湍流的Navier-Stokes方程获得结果。使用八步H_2-空气化学模型对反应进行建模。所开发的数值程序基于通过预处理对化学物源项进行隐式处理,并与不稳定的Navier Stokes方程一起显式求解。该代码已针对标准壁射流实验数据进行了验证,并成功用于对由于放置在加热的超音速气流中的支柱尾流区域中氢的燃烧而产生的反应流场进行建模。

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