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An asymptotic approach to transition

机译：渐近过渡方法

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摘要

A unified theory of large-sized three-dimensional disturbances set up is aimed at developing a dynamical system of transition embracing incompressible fluid as well as subsonic and transonic flows. In appropriately scaled and normalised variables, incompressible and subsonic pulsations obey the same evolution equation for the instantaneous displacement thickness alone. The dynamical system for three-dimensional transonic non-linear waves involves the self-induced pressure as an additional desired function. The notion of the inviscid/inviscid interaction between the upper potential region and an adjustment sublayer at the bottom underlies the theory. In accord with available observational data, the coexistense of organised motion and irregular disturbances is the main conclusion to be drawn from the new asymptotic approach.
机译：建立大型三维扰动的统一理论旨在开发一个包含不可压缩流体以及亚音速和跨音速流的过渡动力系统。在适当缩放和归一化的变量中，不可压缩和亚音速脉动仅针对瞬时位移厚度服从相同的演化方程。三维跨音速非线性波的动力系统将自感应压力作为附加的所需功能。高电位区域和底部的调整子层之间的无粘性/无粘性相互作用的概念奠定了该理论的基础。根据现有的观测数据，有组织运动和不规则干扰的共存是从新渐近方法得出的主要结论。

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