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大涡模拟Lighthill等效声源法的空腔水动噪声预测(PDF)

《哈尔滨工程大学学报》[ISSN:1006-6977/CN:61-1281/TN]

期数:
2010年02期
页码:
182-187
栏目:
出版日期:
2010-02-25

文章信息/Info

Title:
Predicting cavity hydrodynamic noise using a hybrid large eddy simulationLighthill′s equivalent acoustic source method
文章编号:
1006-7043(2010)02-0182-06
作者:
耿冬寒1; 刘正先2
（1.天津工业大学机械电子学院, 天津300160; 2.天津大学流体力学实验室, 天津 300072)
Author(s):
GENG Donghan1;  LIU Zhengxian2
(1.School of Mechatronics, Tianjin University, Tianjin 300160, China; 2. Fluid Mechanics Laboratory, Tianjin University, Tianjin 300072, China)
关键词:
水动噪声; 大涡模拟; 等效声源; 有限元/无限元法; Lighthill声类比
分类号:
O353.1
DOI:
10.3969/j.issn.1006-7043.2010.02.009
文献标识码:
A
摘要:
为了考察空腔产生的水动噪声，对气动声学理论与研究方法进行了分析，确立了大涡模拟等效声源混合法.利用大涡模拟计算空腔非定常流动的流场结构，基于有限元/无限元法利用变分形式的Lighthill声类比方程进行声场的求解.利用该混合法考察了雷诺数为1.2×105的空腔算例频域内噪声的辐射特性，基频值的预测结果与文献基本一致，低频纯音的远场辐射具备指向性,沿上游方向辐射能量较高，高频宽带噪音的传播不具指向性.

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备注/Memo

备注/Memo:
收稿日期： 2009-03-13.
基金项目：国家863计划基金资助项目（2006AA09A312）; 国家自然科学基金资助项目（50705063）.
作者简介：耿冬寒(1981)女, 博士, 讲师,Email: fisherw@163.com.
更新日期/Last Update: 2010-03-12