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Streamwise vorticity in viscous, compressible, steady flow about aircraft

机译:飞机周围粘性,可压缩,稳定流动的气流涡流

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摘要

Streamwise vorticity in viscous, compressible, steady flow about aircraft is analysed on the basis of the steady Reynolds-averaged Navier-Stokes equations. It is shown, that Streamwise vorticity can develop in the presence of stream-normal vorticity and can be non-negligible only inside e.g. boundary layers, shock layers, viscous (turbulent) wakes, jet exhausts and propeller slipstreams, but also along streamlines leaving such viscous and heat conduction dominated flow regions on their downstream side (e.g. downstream of shock layers). However, the actual development of Streamwise vorticity then still depends on such local flow characteristics as e.g. streamline curvature and streamline convergence or divergence. Two illustrative examples are discussed.
机译:基于稳定的雷诺平均Navier-Stokes方程,分析了飞机周围粘性,可压缩,稳定流中的气流涡流。已经表明,在沿流法向涡度的存在下可以产生沿流方向的涡旋,并且仅在例如涡流内部是不可忽略的。边界层,激波层,粘性(湍流)尾流,喷射废气和螺旋桨滑流,但也沿着流线在下游(例如激波层的下游)留下这种粘性和热传导为主的流动区域。但是,沿流方向的涡流的实际发展仍取决于诸如流线曲率和流线收敛或发散。讨论了两个说明性示例。

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