Numerical Simulation of flows about deforming or moving bodies and its engineering application

变形或移动体流动的数值模拟及其工程应用

• 批准号: 07305043
• 负责人: MIYATA Hideaki
• 金额: $ 2.69万
• 依托单位: THE UNIVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07305043/
• 关键词: finite-volume method; moving boundary; hydrofoil; ship motion; grid deformation; 有限差分法; 気泡流; ナビエ・ストークス式

A major part of bodies placed in a flow or moving in fluid is either deformed by external forces and active control or make arbitrary 3D motions. Such a problem has been mostly solved by experimentally evaluating the parameters for the equations of motion, which requires a large amount of effort and time. In the present study the solution of the equations of motions is combined with the time-marching, finite-volume solution for the Navier-Stokes equation. The moving or deformation of the body boundary is treated by two techniques, one is the moving grid technique and the other is the external force technique by coordinate transformation. For the case of the control flap problem of the hydrofoils the moving grid system is developed and for the ship in steady circulating motion the motions are represented by the acceleration terms for the Navier-Stokes equation. Validation is made by comparing with the experimental results and the availability of the present methods for various problems is discussed.

放置在流体中或在流体中运动的物体的主要部分要么受到外力和主动控制而变形，要么做出任意的三维运动。这类问题大多是通过实验计算运动方程的参数来解决的，这需要耗费大量的精力和时间。在本研究中，运动方程的解与Navier-Stokes方程的时间推进有限体积解相结合。物体边界的移动或变形采用两种技术处理，一种是移动网格技术，另一种是通过坐标变换的外力技术。对于水翼船的控制襟翼问题，提出了运动网格系统，对于处于稳定循环运动的船舶，运动用加速度项表示，用Navier-Stokes方程表示。通过与实验结果的比较，对所提方法进行了验证，并讨论了所提方法对各种问题的有效性。

项目成果

Takafumi, Kawamura Hideaki, Miyata et. al: "CFD simulation of the Flow around Planing Craft and Tandem Hydrofoils" Proc. 3rd Intern. Conf. Fast Sea Transportation. 1181-1192 (1995)

Takafumi、Kawamura Hideaki、Miyata 等。

大森拓也,藤野,宮田,他: "肥大船の操縦運動中に流場に関する研究(第三報)" 日本造船学会論文集. 179. 125-138 (1996)

Takuy​​a Omori、Fujino、Miyata 等人：“大型船舶操纵运动过程中的流场研究（第三份报告）” 日本造船学会汇刊 179. 125-138 (1996)。

川島英幹,宮田秀明: "変形格子を使った有限体積法によるタンデム水中翼のシミュレーション" 日本造船学会論文集. 179. 11-19 (1996)

Hideki Kawashima、Hideaki Miyata：“使用变形网格通过有限体积法模拟串联水翼”日本造船学会汇刊 179. 11-19 (1996)。

内山幸樹・宮田秀明: "壁面近傍の気泡運動の3次元非定常数値シミュレーション" 第9回 数値流体力学シンポジウム. 353-354 (1995)

Koki Uchiyama 和 Hideaki Miyata：“壁附近气泡运动的三维非定常数值模拟”第九届计算流体动力学研讨会 353-354（1995 年）。

Takuya, Omori Masataka, Fujino Hideaki, Miyata et. al: "A Study on Flow Field Around Full Ship Forms in Maneuvering Motion (3rd Report : Flow Field Around Ship's Hull in Steady Turning Condition)" Journal of the society of neval architects of Japan. Vol.

Takuy​​a、大森正孝、藤野英明、宫田等