unsteady flow

One dimensional unsteady flow induced by a high speed train entering a tunnel was numerically studied using the method of characteristics.

为了给我国的高速铁路设计提供理论依据，采用特征线法对高速列车进入隧道引起的一维非定常流动进行了数值研究。

According to the unsteady flow of the metal, the VOF method which is widely used in the Computational Fluid Dynamics is induced into the catch of the metal free surface. The flowing trend of the metal free surface is simulated factually and good surface finish is obtained.

针对材料的非稳态流动，将计算流体领域广泛应用的VOF方法引入铝型材挤压过程中的金属流动前沿的动态捕捉中来，真实地模拟了金属前沿流动趋势，得到了良好的表面质量。

Secondly, the model of 2-D overtopping unsteady flow based on finite volume method ( FVM) is presented the weir formula is used here to realize the coupling calculating of three step method and FVM. the generating algorithm of the data structure of grid is developed.

根据简化有限体积法建立了二维漫顶非恒定流模型，提出了漫顶条件下三级解法和有限体积法耦合的计算方法，提出网格数据结构的生成算法。

The unsteady calculation adopts the Non Linear Harmonic ( NLH) function, to be aimed at blades preliminary designed, to analyze the aerodynamic performance and possible loss of the LSBs, and analyze the influence of the unsteady flow on LSBs based on the results.

非定常计算采用非线性谐函数方法，针对初步成型的叶片，分析其气动性能及可能的损失，并基于流场结果分析非定常流动对末级叶片的影响。

The study shows that the film resistance temperature probe features high frequency response, fine linearity, high sensitivity and ease to use, so it has a bright prospect in application to unsteady flow measurements.

实践表明，薄膜热电阻温度探针以其高频响、良好的线性度、高灵敏度和简单实用，在非定常流温度测量中有良好的应用前景。

Aimed at four kinds of practical cases in the field hydraulic tests, their respective formulas have been deduced based on unsteady well flow theory and the principle of superposition of potential functions.

针对野外水力试验常遇到的四种实际情况，根据非稳定井流理论和势函数叠加原理导出了它们各自的求参公式。

The experimental results indicate that under 10 ° attack angle, there exists an unsteady flow and large separation area near suction side of the cascade.

实验结果表明，在10°左右攻角下，叶栅流道中存在很强的非定常流动，叶片吸力面附近存在大面积分离；

Muzzle flow field is unsteady multiphase flow field with strong wave interrupt and exquisite chemical reaction.

膛口流场是一种非定常、多相并带有强激波间断和剧烈化学反应的复杂流场.

The author provides a computation pattern of the celerity of wave crest and wave trough ( Vc, Vt), and the influenced distance of unsteady flow ( S).

提出水位变化幅度（△H），波峰、波谷传递速度（V峰、V谷），以及不稳定流波及其距离（S）的计算模式。

Measurement of Velocity-time Relation in Unsteady Flow by using Plasma Tracers Formed from Sequential Pulse Laser

用序列脉冲激光等离子体示踪方法测量非定常流的速度&时间变化

Frequency Analysis of Three Dimensional Compressor Cascade Unsteady Flow Mechanism Research

三维扩压叶栅非定常流动机理研究的频谱分析

It describes unsteady flow toward a discharging well in an extensive aquifer.

它描述位于广阔含水层中的抽水井的非稳定流.

The application of hot wire anemometer in turbojet components unsteady flow measurement

论热线风速仪在涡喷部件非定常流测量中的应用

When a Flow Compressible [ For Both Steady and Unsteady Flow ]?

什麽时候流动是可压缩的 [ 对稳态和非稳态流而言 ]?

According to Bernoulli Equation of unsteady flow, the hydraulic calculation model of multi-source pipe network based on graph theory in slowly transient state is established, which can provide more information of hydraulic elements in slowly transient state.

根据非恒定流伯努利方程，建立的基于图论的多水源慢变流管网水力计算模型，可以提供更多的慢变流情况下的水力要素信息。

Based on Bernoulli equation of unsteady flow, a random walk model is presented for numerical simulation of unsteady flow in river networks in regional planning.

从非恒定流能量方程出发，建立随机游动模型，用蒙特卡罗方法数值模拟区域规划中的河网水流运动。

The problem of unsteady separated flow of rapidly pitching airfoil with oscillating motion is computationally studied.

对带振荡的快速上仰翼型的非定常分离流问题进行了计算研究.

A method for measuring two-dimensional unsteady flow velocity with x-hot-wire probes

用X热线探针测量二元非定常流速度的方法

Database software of shiplock ′ s filling and emptying system and real-time simulation of unsteady flow in approach channel

船闸输水系统数据库软件与引航道非恒定流实时模拟

Research on Navigation of Long Tailwater Channel Affected by Unsteady Flow

电站非恒定流对长尾水渠通航的影响

Experimental and Numerical Study on the clocking effect of static blade in a low-speed compressor unsteady flow behavior of near-stall states in low-speed compressor under different distortions

低速压气机中静叶Clocking效应的二维和三维数值模拟与实验结果验证不同进口畸变下低速压气机近失速状态非定常特征

Analysis of unsteady flow through a single fissure

单裂隙非稳定流分析

Upon this premise, the temperature response of semi-infinite coal wall and the heat conductivity of coal wall are studied, and it is concluded that the front coal wall temperature and thermal flow change periodically in unsteady state simple harmonic mode with time.

以此为前提，研究了煤壁的半无限体温度响应及煤壁导热传递，并得出气化炉前方煤壁温度及热流随时间发生周期性非稳态简谐式变化的结论。

By taking advantage of PIV ( Particle Image Velocimetry) technique, the unsteady flow fields around different ribs are captured, which reveals the nonlinear evolution processes of vortices.

用粒子图像测速仪（PIV）设备对不同高度下肋板的非定常绕流场进行了全场测试，揭示了肋板尾流场旋涡随时间推进所经历的非线性演化过程。

On the basis of three-dimensional equations of motion and the equation of continuity of the incompressible unsteady flow, the three dimensional velocity distribution and variation of tidal levels with.

本文根据不可压缩三维非定常流的动量方程和连续方程，求解了宽浅型明渠中三维流速分布和水位随时间的变化规律。

When is a Flow Compressible [ For Both Steady and Unsteady Flow ]?

什么时候流动是可压缩的 [ 对定常和非定常流来说 ]?

Unsteady flow in centrifugal impeller has been measured by mean of PIV.

利用激光成像速度仪(PIV) 测量了旋转离心叶轮内部的非定常流场.

Model test study on unsteady flow around the bridge pier

桥渡非恒定流水工模型试验研究

In the second part an unsteady thermal flow of upper-convected Maxwell fluid is studied.

本文的第二部份研究了上随体Maxwell流体管内热流动.对于注入模腔流动。

A platinum-film resistance temperature probe for unsteady flow measurements

非定常流测量用薄膜热电阻温度探针的性能研究