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轴流泵叶轮内空化流动的数值计算（Numerical Calculation of Cavitating Flow in Impeller of Axial-flow Pump）
轴流泵叶轮内空化流动的数值轴流泵 叶轮 空化流动 数值计算
2010/12/28
首先通过轴流式模型泵外特性试验，确定了汽蚀性能曲线。基于完整空化模型和混合流体两相流模型，对轴流式模型泵设计工况下叶轮内空化流动进行全流道数值计算。选择空化开始发生、临界汽蚀点以及空化严重时3个工况比较分析叶轮内空化流动的发展情况。计算获得了不同汽蚀余量时叶片背面静压、空泡体积组分分布和不同轴截面上的空泡体积组分分布。计算结果表明空化最初发生在叶片背面进口靠近轮缘的局部低压区；在临界汽蚀点处，空化...
流固耦合作用对离心泵内部流场影响的数值计算（Numerical Calculation for Effect of Fluid-structure Interaction on Flow Field in Centrifugal Pump）
流固耦合 离心泵 流场 数值计算
2009/12/28
采用双向同步求解的方法对离心泵内流场和叶轮结构响应进行联合求解，研究了叶轮流固耦合作用对离心泵内部流场的影响。流场模拟基于Reynolds时均化N-S方程和标准k-ε两方程湍流模型，采用多重坐标系法；结构响应基于弹性体结构动力学方程。并将计算所得的流道网格变形、流场静压和速度的分布以及径向力等结果与非流固耦合计算的流场进行对比分析。分析结果表明，流固耦合作用使得流体和固体区域计算网格发生微小变形，...
Numerical Calculation of the Flow Inside Pump Impellers Using 3D Euler Equations
Centrifugal Pump 3D Euler Equations Finite-Volume Technique Impeller Performance
2009/10/14
The flow pattern inside an impeller should be determined for maximum eciency and performance. The e ects of the design parameters on the pump performance can be determined using numerical calculation...
The Experiment and Numerical Calculation of Propeller Performance with Surface Roughness Effects
Propeller Performance Surface Roughness Boundary Layer
2009/5/18
As well known, propeller and hull of ship are fouled and their surface are roughened due to various causes such as adhesion of sea-lives, painting degradation, cavitation erosion etc. The surface roug...
A Numerical Calculation of the Circulation in the North Atlantic Ocean
North Atlantic Ocean Numerical Calculation
2009/4/3
A series of numerical experiments are carried out to simulate the three-dimensional circulation in the North Atlantic Ocean and to examine the dynamics therein. The calculations are partly diagnostic ...
On Coastal Trapped Waves：Analysis and Numerical Calculation by Inverse Iteration
Coastal Trapped Waves Numerical Calculation Inverse Iteration
2009/2/23
Waves of sub-inertial frequency in a continuously stratified ocean and trapped over a continental shelf and slope are considered. They form one infinite discrete sequence of modes with frequencies dec...