本文旨在用三维非定常流模型计算气缸内的空气流动。
In this paper, 3-dimensional unsteady flow model for calculating gas flow in cylinder is introduced.
对扑翼的非定常流场，传统的定常涡格法已不再适用。
For the strongly unsteady characteristic of the flow field of flapping-wing, the traditional vortex lattice method is not more effective.
计算结果表明，振荡叶栅非定常流场的压力响应在叶栅前缘较大。
The results show that the unsteady pressure response is large in the oscillating cascade leading edge.
本文提出了用小扰动欧拉振幅方程求解振动叶栅非定常流场的方法。
In this paper, the Euler amplitude equation is developed to obtain the unsteady flow field in vibrating cascades.
本文采用数值方法对叶轮机基元非定常流和排间匹配进行深入研究。
Numerical studies about cascade unsteady flow and the edge-matching technique are presented in this paper.
通过数值模拟，对一个低压压气机转子的非定常流场进行结构分析和频谱分析。
Based on the numerical simulation method, frequency spectrum analysis and structure analysis were conducted for the three dimensional unsteady flow inside the compressor rotor.
最后，非定常流的结果进一步表明，逆流喷管是一种较高效率的射流式矢量喷管。
Lastly, the results of unsteady flow point out, counterflow thrust vectoring nozzle is a efficiency fluidic vectoring nozzle.
准确数值模拟机翼动态失速时非定常流场主要有湍流模型和数值算法两方面的难点。
The numerical simulation of the unsteady flow field around an oscillating airfoil is difficult because of the complexity of turbulence models and numerical methods.
采用定常流和非定常流计算方法研究了各种动静叶稠度组合对轴流压缩机性能的影响。
In this paper, the effects of solidity of rotor-stator cascades on axial-flow compressor performance are investigated with steady and unsteady flow calculation.
利用非定常流函数涡量方程数值模拟圆柱突然起动尾流涡旋的形成及周期性脱落过程。
The unsteady equations of stream and vorticity functions were used for numerical simulation on the process of the vortex formation and periodic shedding from an impulsively started circular cylinder.
从非定常流场计算出发系统的研究了嗡鸣发生的机理以及扰流片对嗡鸣起抑制作用的机理；
Through solving the unsteady flow fields of an airfoil-flap, the mechanism of buzz is intensively studied.
非定常流中流速分布及湍流中欧拉空间关联函数都需要同时测量各空间点的速度作为时间的函数。
In unsteady flows it may be relevant to measure the spatial velocity distribution as a function of time.
计算并讨论非定常流场与气动声场计算结果，并分析此数值模型可以进一步完善的一些重要方面。
Numerical results of fluid and acoustic fields are reported and discussed. Some important issues for further development of the simulation model are discussed.
此外，通过对振荡叶栅非定常流场结构的研究，发现了叶片吸力面气流分离与叶片振动之间的耦合关系。
Through studying the structure of the unsteady flow field in vibrating cascades, the coupling relationship between flow separation on the suction surface and blade vibration is revealed.
本文基于一维非稳态多分支非定常流，建立了相应的数学模型，采用有限容积法理论对方程进行数值离散分析。
The thesis established the flow model based on one-dimensional, unsteady, compressible, Navier-Stokes equations, and discrete the governing equations using a finite-volume formulation.
采用参数多项式方法和振荡流体力学理论，求解静子叶片后的尾流场及尾流场作用下转子叶片通道内的非定常流场。
The wake flow of stator vanes and the unsteady flow in the passage of rotor blades were solved by using oscillating fluid mechanics theory and parametric polynomial method.
对尾迹干扰下的转子非定常流场进行数值模拟，与传统设计定常流动假设下均匀进气的流场对比分析了尾迹干扰的影响。
Unsteady flow in the rotor is simulated and contrast between the flow field with wake flow at the inlet and that with uniform one is presented.
为了适应非定常流场对网格品质要求较高的特点，网格生成采用了基于几何外形、模型表面曲率为基础的自适应生成及加密方法。
The unsteady flow request a higher quality in grid so in this article the Cartesian grid is generated based on geometric and the body curvature.
本文采用数值方法模拟了一个三孔探头周围与测压孔内的二维可压缩非定常流场，研究了动态效应对探头绕流和测孔压力的影响，以及相应的测量误差。
The 2D unsteady flow fields around a 3-hole probe head and in its pressureholes have been numerically simulated in order to investigate the dynamic effects on the probe measurement errors.
下游静叶干涉增加了动叶顶部间隙流的非定常波动强度和泄漏损失。
Downstream rotor-stator interaction increases the unsteady fluctuating intensities of the rotor tip clearance flow and the tip leakage loss.
试验结果表明，该试验技术对进行轴流压气机叶片排流场非定常频谱特性试验是行之有效的。
Test results have shown that the test technology is effective and suitable for test of unsteady flow frequency spectrum performance of axial compressor.
文中给出了VKI透平叶栅内的定常流结果和1.5级透平叶栅内的非定常数值结果。
Numerical results of steady flow in the VKI gas turbine cascade and unsteady flow in a 1.5 stage steam turbine are presented.
矿井火灾时期，火源巷道内高温烟流运动为三维非定常的流动及传热传质过程。
The movement of high temperature smoke in a fire road during mine fire was a three dimensional unsteady flow which is accompanied with heat and mass transfer.
通过采用外部声激励的方式，在低速轴流压气机内研究非定常尾流撞击效应对压气机流场结构以及时均气动性能的影响。
Influence of the wake impact effect on the flow field and its average performance in a low speed axial-flow compressor was investigated by using external acoustic excitations.
将笔者以前关于近磁尾赤道面附近的漂移气球模不稳定性工作推广到非赤道区和存在非定常地向流的情形。
Previous work on drift ballooning instability in the equatorial region has been extended to include a decelerated non stationary flow and to consider the off equator regions.
文中采用冲击横流比拟概念，将绕旋成体的三维、定常、分离流问题转化为二维、非定常、分离流问题来求解。
By using the impulsion flow analogy, the three dimensional, steady, separated flow problem is reduced to the two dimensional, unsteady, separated flow problem for solution.
本文介绍一种带操纵面机翼的非定常跨声速流的有限差分计算方法。
A numerical method is presented for predicting unsteady transonic aerodynamic flow about aircraft wings with control surface.
将非定常势流理论用于应急上浮运动流场分析与水动力计算。
The unsteady potential flow theory is used to analyses the flow field and hydro-dynamic calculation.
本文采用二维可压缩非定常N-S方程模拟了带有上下开槽壁的跨声速二维管风洞中超临界翼型绕流的流场。
Transonic tube wind tunnel flows over supercritical airfoils with slots on both upper and lower walls have been simulated by using compressible unsteady two dimensional Navier-Stokes equations.
本文采用二维可压缩非定常N-S方程模拟了带有上下开槽壁的跨声速二维管风洞中超临界翼型绕流的流场。
Transonic tube wind tunnel flows over supercritical airfoils with slots on both upper and lower walls have been simulated by using compressible unsteady two dimensional Navier-Stokes equations.
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