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首页> 外文期刊>International Journal of Heat and Fluid Flow >VLES study of a jet impinging onto a heated wall
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VLES study of a jet impinging onto a heated wall

机译：VLES研究射流撞击加热的墙壁

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摘要

A flow configuration representing a jet issuing from a channel-shaped nozzle, at a moderate Reynolds number corresponding to Re-m = 9120, and impinging perpendicularly onto a heated wall is studied computationally within a time-accurate VLES (Very Large Eddy Simulation) framework. The presently obtained VLES-results are analyzed along with the available reference database provided by Hattori and Nagano (2004) by means of Direct Numerical Simulations (DNS). In addition, the RANS (Reynolds averaged Navier-Stokes) computations employing an elliptic-relaxation-based eddy-viscosity model, representing the constituent of the present VLES modeling scheme, are performed for the sake of a comparative assessment. Prior to the impinging jet flow, the VLES model is validated by computing convective heat transfer in a plane channel at friction-velocity-based Reynolds numbers Re-tau = 180 and for which the DNS database is made available by Kawamura et al. (1998) and Abe et al. (2012). Reasonable to very good agreement with the DNS database concerning the mean flow and thermal field properties and associated turbulence quantities is achieved.
机译：在时间精确的VLES（超大型涡模拟）框架内，通过计算研究了代表从通道形喷嘴喷出的射流的流形，该流形的雷诺数对应于Re-m = 9120，并垂直冲击到加热的壁上。通过直接数值模拟（DNS），分析了当前获得的VLES结果以及Hattori和Nagano（2004）提供的参考数据库。另外，为了进行比较评估，执行了代表基于当前VLES建模方案的基于椭圆松弛的涡流粘度模型的RANS（雷诺平均Navier-Stokes）计算。在撞击射流之前，通过计算平面通道中基于摩擦速度的雷诺数Re-tau = 180的对流传热来验证VLES模型，并且Kawamura等人可以使用该数据库获得DNS数据库。 （1998）和Abe等。 （2012）。与DNS数据库就平均流场和热场性质以及相关的湍流量达成了合理的非常好的协议。

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