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On bypass transition in separation bubbles: a review
Propulsion and Power Research ( IF 5.3 ) Pub Date : 2019-01-14 , DOI: 10.1016/j.jppr.2018.12.004
Zhiyin Yang

Transition from laminar flow to turbulent flow is of great practical interest as it occurs in many engineering flows and often plays a critical role in aerodynamics and heat transfer performance of those flow devices. There could be many routes through transition, depending on flow configuration, geometry and the way in which transition is initiated by a wide range of possible background disturbances such as free-stream turbulence, pressure gradient, acoustic noise, wall roughness and obstructions, periodic unsteady disturbance and so on. This paper presents a brief overview of wall bounded flow transition in general and focuses more on the transition process in the free shear layer of separation bubbles, demonstrating that at elevated free-stream turbulent intensity the so called bypass transition could occur in geometrically induced separation bubbles where the separation point is fixed.



中文翻译:

分离气泡中的旁路过渡:综述

从层流到湍流的转换具有很大的实际意义,因为它发生在许多工程流中,并且通常在这些流动装置的空气动力学和传热性能中起关键作用。过渡过程可能有很多路线,具体取决于流动配置,几何形状以及过渡过程的方式,过渡过程是由各种可能的背景干扰(例如自由流湍流,压力梯度,声噪声,壁面粗糙度和障碍物,周期性不稳定)引发的干扰等。本文简要概述了壁边界流动的过渡过程,并着重于分离气泡的自由剪切层中的过渡过程,

更新日期:2019-01-14
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