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STUDY ON DEVELOPMENT OF THE DIGITAL IMAGE-PRESSURE MEASUREMENT TECHNOLOGY OF UNSTEADY FLOW AND THE STRUCTURE OF SHOCK WAVES BY CFD

基于CFD的非定常流数字图像压力测量技术及激波结构研究

基本信息

批准号：
16560163
负责人：
KOJIMA Tadatoma
金额：
$ 2.18万
依托单位：
KINKI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560163/
关键词：
Unsteady Flow Digital Image Processing Pressure Measurements Flow visualization Jet Noise Self exited Vibration CFD Shock Wave 超音速噴流可視化画像計測流体関連振動

项目摘要

For the purpose of the development of non-regular pressure measurement technology on supersonic flow, the development of visualization image measurement technology by the application of the digital camera, and for study on the flow phenomenon of unsteady flows, the oscillating phenomenon of shock waves by the application of CFD, the part of research has been done. Especially, in order to solve the study on digital visualization image processing establishment system and the digital images in flow field, the shock wave structure in a supersonic jet flow and the self-excited oscillation were was subjected to be done by the application of CFD. Furthermore, for that make it understood about the relation between generation source of the noise and the self-excited oscillation flow with shock wave, the analyses on the frequency of pressure vibration and digital noise were done through the application of digital visualization image measurement technology, non-regular pressure measurement technology, and a certain amount research was able to be obtained. As a result, the structure of the Coanda effect was clarified by the experiment and its behavior was clarified by the numerical analysis. Moreover numerical analysis of the propagation of shock waves was carried out using several different silencer models with internal structures of comparatively simple numerical analysis.

本文以发展超声速流场非规则压力测量技术为目的，以数码相机为应用手段，发展可视化图像测量技术为目的，以CFD为应用手段，研究非定常流场的流动现象、激波振荡现象为目的，开展了这部分的研究工作。特别是为了解决数字可视化图像处理系统的建立和流场数字图像的研究，应用CFD技术对超声速射流中的激波结构和自激振荡进行了研究。此外，为了了解噪声的产生源与带激波的自激振荡流动之间的关系，应用数字可视化图像测量技术、非规则测压技术对压力振动频率和数字噪声进行了分析，取得了一定的研究成果。结果表明，柯恩达效应的结构是由实验澄清，其行为是由数值分析澄清。此外，数值分析的冲击波的传播进行了使用几种不同的消声器模型与内部结构的比较简单的数值分析。

项目成果

期刊论文数量（29）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

ジェット騒音に及ぼす擬似衝撃波の自励振動の影響について

赝激波自激振动对喷气噪声的影响

DOI：
发表时间：
2004
期刊：
近畿大学工学部研究報告 No.38
影响因子：
0
作者：
鈴木;戸田;山本;Goichi Matsui;松井剛一ほか2名;Akihiro SHINOZUKA;Hongbing MA;篠塚晃裕;篠塚晃裕;Tadatomo KOJIMA;KOJIMA.T;児島忠倫他;児島忠倫他
通讯作者：
児島忠倫他

衝撃波の振動現象と騒音との関連性

冲击波振动现象与噪声的关系