顶流

结果表明：高原上空H2O混合比在对流层上层随高度迅速减少，在对流层顶和平流层底达到极小值，平流层里水汽混合比随高度增加。

The results show that the H2O mixing ratio decreases with height in upper troposphere quickly reaches a minimum near the tropopause and the bottom of stratosphere ; and then it increases .

论文通过对溃堤机理的研究，采用Fread提出的宽顶堰流公式来计算堤防决口口门过流量。

The break-dam flux is calculated by Fread formula based on analysis of the mechanism of break-dam .

压气机非定常叶顶间隙流的数值模拟研究

Investigation on unsteady tip clearance flow in a compressor by numerical simulations

宽顶堰流的边界元法计算

BEM Applied to the Calculation of Flow over Broad-Crested Weirs

解释叶顶间隙流产生非定常波动的物理机制；

Part four discusses the originating mechanism of unsteady tip clearance flow .

用临界淹没法计算宽顶堰流

Critical Submerged Method Applied to the Computation of Flow over Broad crested Weirs

周向弯曲叶片叶顶泄漏流随流量变化特性数值研究

Numerical analysis on tip leakage flow of circumferential skewed blades according to flow rates

高水头船闸反弧形阀门门顶缝隙流特性及其应用

Characteristics and applications of top gap slit flow at reversed tainter valve on lock with high lift

结果表明，叶顶泄漏流造成了主流通道内流体的非定常流动。

The results show that the unsteady of main stream is caused by the tip leakage flow .

对叶轮内流动模拟，说明了叶顶泄漏流对主流的作用，以及叶轮内部壁角涡的形成与发展。

Simulated flow inside impeller illustrates the tip clearance and corner vortex developing and mixing with main flow through passage .

喷气不仅改变了叶顶泄漏流的起始触发位置，还影响到其形成后的形态和运行轨迹；

Not only the initiation position but also the trajectory of tip leakage flow is influenced by the air injection .

在进行溃口计算过程中，本文采用无坎宽顶堰流公式来进行计算；

During the computation of dike burst , this thesis used the formula of the broad-crested weir without bank to fulfill it .

探索利用叶顶间隙流非定常特征提高压气机性能的可能性。

Part five explores the possibility of the improvement of the compressor performance by taking advantage of the unsteady tip clearance flow .

研究叶顶间隙流的非定常流动特征和某些几何和气动参数改变对这种流动特征的影响；

Part three concentrates on the unsteady tip clearance flow behavior , and the effects of some geometric and aerodynamic parameters on such behavior are evaluated .

近年来，人们发现压气机叶顶间隙流并非始终处于定常状态，在某些流动条件下，它会产生明显的非定常波动，并影响压气机的总性能。

Recently , the unsteady characteristics of tip clearance flow , which appears in some flow conditions , was discovered and its influence to the compressor performance was recognized .

受喷射气流的影响，叶顶泄漏流进行自发非定常波动的动态平衡被破坏，建立起新的周期性非定常波动；

Under the influence of injected flow , the dynamic balance that drives the self-induced unsteady tip leakage flow is destroyed and a new forced-induced periodic fluctuation of tip leakage flow establishes .

结果发现，叶顶间隙流、叶片背部间隙流及轮盘背部间隙流相互作用，动叶通道内存在复杂的间隙二次流结构。

It is found that the tip clearance flow , blade backface clearance flow and backface cavity clearance flow interact with each other and the secondary flow structure in the blade passage is complicated .

采用边界层理论和临界水深理论，实现了流线形宽顶堰流的水力计算，此方法为宽顶堰流流量的计算开辟了一条新途径。

Using boundary layer and critical depth of flow theories , the hydraulic calculations are carries out for streamlined broad-crested weir . The method open a new way in the calculation of the broad-crested weir .

叶顶间隙流对压气机性能和稳定性都有着重要影响，对其机理的研究和认识，进而实现对其控制，对于提高航空发动机及其它燃气轮机的气动性能和稳定性具有重要意义。

To improve the performance and reliability of aero-engine and other gas turbines , it is of great importance that the mechanism of the compressor tip clearance flow is well understood , and furthermore , successful control of it realized .

对淹没宽顶堰泄流能力计算公式的探讨

A Calculating Formula for Spillway Capacity of Drowned Wide Crest Weirs

具有叶顶间隙轴流叶栅流动数值模拟

Numerical Study of the Flow in Axial Cascade with Tip Clearance

无坎宽顶堰堰流流量系数的探讨

Discussion on weir flow coefficient for broad-crest ridge-free weirs

带叶顶间隙轴流转子三维流动的数值模拟

Numerical Study of the Three-Dimensional Flow in the Axial Flow Rotor with Tip Clearance

高炉无料钟炉顶布料料流轨迹检测与三维图像重建

Measurement of charging trajectory in bell-less top burden of blast furnace and 3-D image reconstruction

高炉无钟炉顶按料流宽度布料新方法

The new methods of burden distribution with width burden in a bell-less top blast furnace

用高速摄影法测定了钢包水模型浸入式顶吹气粉流的最大穿透深度、扩张角及气泡流／射流转变行为。

The maximum penetration depth , expension angle and transition behavior of bubbling-jetting of immersion top-blow gas-particle flow in a ladle water model are measured with photography at high speed .

跨音速轴流压气机叶顶间隙泄漏流对微喷气的非定常响应机制和扩稳效果研究

UNSTEADY RESPONSE OF TIP LEAKAGE FLOW TO DISCRETE MICRO TIP INJECTION IN A TRANSONIC AXIAL COMPRESSOR AND ITS EFFECT ON STABILITY ENHANCEMENT A Numerical Simulation Consideration an Exhaust Gas Turbine Stage Cascade with Tip Clearance

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。

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 .

磁层顶边界层剪切流引起的MHD波模转化

Wave transformation induced by shear flow in the magnetopause boundary layer

磁层顶边界区剪切流MHD不稳定性的数值模拟研究III.大振幅MHD波

Simulation study of the MHD instabilities caused by the sheared flow at the boundarylayer of the magnetosphere