The critical layers of waves in parallel shear flow are generally classified into three kinds: viscosity critical layer, nonlinear critical layer, and non-steady critical layer.
平行切变流的临界层一般分为三类：粘性临界层、非线性临界层和非定常临界层。
The modeling for three-dimensional incompressible viscous non-isothermal steady flow was presented by using penalty finite element method.
针对幂律型流体，建立了稳态三维粘性不可压缩流体非等温流动的有限元模型。
The non-steady flow in pressure water-carriage system have quite influence on the stability and safety of operation of hydropower station, so it is paid more attention.
这两者各具特点，但又有机地联系在一起。水电站有压输水系统非恒定流对水电站的稳定及安全运行有很大影响，所以对其研究也倍受人们重视。
Then from the expression of gas well deliverability in pseudo-steady state flow, there can have the expression of gas PI with and without high speed non-Darcy percolation.
同时还对拟稳定流动气井产能公式进行推导，推导出考虑高速非达西渗流、不考虑高速非达西渗流的采气指数的表达式。
From the standpoint of coupling of non-steady flow with elastic blade vibration, studied was the forced response of blades, which is of major significance for the high-cycle fatigue of blades.
从非定常流动和弹性叶片振动相耦合的角度来研究叶片的强迫响应，对于叶片的高周疲劳具有重要意义。
It is indicated that the flow field over a backward facing step possesses simultaneously the characteristic of non-steady flow and steady flow.
后向台阶流的流场同时具有非定常性和定常性的特性。
Numerical simulation of three-dimensional, steady, isentropic, non-symmetrical flow in rocket nozzles is completed using a bicharacteristic method.
利用特征线方法数值模拟了双圆弧和抛物线两种特型喷管中的三维非对称定常等熵的超音速流场。
Study the gas dynamic characteristic based on non-steady flow theory of gas.
首先本文运用非定常气流流动理论来研究热风炉管内气柱的动力特性。
Secondly, in conditions of non-steady flow, azinuthal velocity and shear stress distribution were deduced according to function approximation method.
在非稳流下，采用函数拟合法，得出流体切向速度随半径变化的表达式及流体所受切向剪切力和分布曲线。
A three dimensional mathematical model for calculating the steady flow of multiple non buoyant turbulent jets in a cross flowing is present in this paper.
采用作者给出的三维紊流模型，结合混合有限分析法及交错网格对浅水型河道中扩散器垂向排放的流动进行了数值计算。
Most of wter flow in open-channel or in river belongs to steady non-uniform flow. The surface profiles are caused by changes of channel section. It is very important to analyze its computations.
人工渠道中的水流绝大多数是非均匀流，分析计算其水面曲线的变化规律是确定明渠边墙高度及回水淹没范围的重要依据，因此在工程实践中具有十分重要的意义。
The paper takes the correlated non-steady-flow inrush water calculation formula as the basic formula, and has the well field regulating calculation in the form of tables.
将地下水非稳定流涌水量计算解析式作为基本公式，列表进行水源地调节计算。
The characteristic method was used in simulating computation of non steady gas flow process in the exhaust system of model 15a petrol engine.
针对15A型二冲程汽油机排气系统的流动过程进行了模拟计算，对计算中某些边界条件的计算方法进行了探讨。
The analysis shows that Darcy flow in steady fluid flow is only a special case of non-Darcy flow.
分析结果表明，稳定流动时，达西流只是非达西流的一个特例。
The topping field of an earth-rock dam is divided into one-dimensional steady spatially varied flow field and two-dimensional Non-Darcy seepage flow field.
本文将土石堰过流场区分为一维恒定变量流场和二维恒定非达西渗流场；
In chapter three, horizontal well non-darcy steady flow productivity formula for two different reservoir 'conditions were derived.
第三章中推导了两种不同储层条件下的水平井非达西稳态渗流方程。
In chapter three, horizontal well non-darcy steady flow productivity formula for two different reservoir 'conditions were derived.
第三章中推导了两种不同储层条件下的水平井非达西稳态渗流方程。
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