Research on Application of Lagrangian Direct Numerical Simulation to the Unsteady Incomprssible Viscous Flow with Moving boundary.

拉格朗日直接数值模拟在动边界非定常不可压缩粘性流中的应用研究。

• 批准号: 07455083
• 负责人: KAMEMOTO Kyoji
• 金额: $ 4.48万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455083/
• 关键词: Moving Boundary; Unsteady Incompressible Viscous Flow; Lagrangian Direct Numerical Simulation; Vortex Method; Flow Induced Vibration Problems; Oscillating Body; Lock-in; 渦法; 振動円柱; 振動物体曳航水槽; 振動角柱; 振動物体曵航水槽

In this research, the advanced vortex method was extended to the analysis of unsteady incompressible viscous flow around oscilating or moving boundaries by introducing the moving boundary condition. The validity of the calculation technique presented here was examined by the simulation of flow around a forced oscillating circular cylinder. The calculation results, such as unsteady fluid force acting on the cylinder and typical flow patterns, vortex structures in the wake and lock-in phenomena were in good agreement with those of experiments. The simulation technique was also applied to the analysis of flow around an freely oscillating circular cylinder, an oscillating airfoil, and unsteady characteristics of flows through a centrifugal-pump impeller. It is confirmed that the advanced vortex method with moving boundary condition is one of the efficient tool of the research on flow around moving boundary and flow induced vbration problems.The flow around a forced oscillating circular cylinder was investigated experimentally in a water tank. The typical flow patterns, vortex structures were visualized and unsteady fluid forces were measured.

在这项研究中，通过引入移动边界条件，将高级涡流方法扩展到对振动或移动边界周围不稳定不稳定的粘性流的分析。通过在强迫振荡的圆柱体周围进行流动的模拟来检查此处介绍的计算技术的有效性。计算结果，例如作用在圆柱体上的不稳定流体力和典型的流动模式，唤醒中的涡流结构和锁定现象与实验的旋转结构非常吻合。模拟技术还应用于自由振荡的圆柱体周围的流动分析，振荡的机翼以及通过离心泵叶轮的流动的不稳定特性。可以证实，具有移动边界条件的高级涡流方法是移动边界周围流动和流动诱导的VBRATION问题研究的有效工具之一。在水箱中，通过实验研究了强迫振荡的圆形圆柱体周围的流动。典型的流动模式，涡流结构可视化并测量不稳定的流体力。

项目成果

K.Kamemoto, et al.: "On the extensive applicability of vortex methods to prediction of flow-induced vibration problems." Flow-Induced Vibration.205-213 (1995)

K.Kamemoto 等人：“论涡流方法在预测流引起的振动问题方面的广泛适用性。”

K.Kamemoto, et al.: "On the extensive applicability of vortex methods to prediction of flow-induced vibration problems." Flow-Induced Vibration. 205-213 (1995)

K.Kamemoto 等人：“论涡流方法在预测流引起的振动问题方面的广泛适用性。”

K.Kamemoto, et al.: "Analysis of Unsteady Characteristics of Flows through A Centrifugal-Pump Impeller by an Advanced Vortex Method." Hydraulic Machinery and Cavitation. 729-738 (1996)

K.Kamemoto 等人：“采用先进涡流法分析离心泵叶轮流动的不稳定特性。”