轴对称体空泡流的噪声特性与空泡界面瞬态特征  

Noise Feature of Cavitation Flows on Axisymmetric Bodies and Transient Characteristics of Cavity Interface

作　　者：顾巍[1] 何友声[1] 胡天群[2] 

机构地区：[1]上海交通大学建筑工程与力学学院,上海200030 [2]上海船舶运输科学研究所,上海200135

出　　处：《上海交通大学学报》2000年第8期1026-1030,共5页Journal of Shanghai Jiaotong University

摘　　要：在空泡流发展的各个阶段 ,空泡呈现各种不同的流动特性和界面特征 ,且空泡流噪声与其界面的流动特征具有强烈的相关性 .本试验通过对半球头和 45°锥头轴对称体空泡流噪声测量和观察 ,运用总声级分析了空泡流发展各阶段的噪声特性 ,并与高速摄影记录的相应空泡界面特征进行比较后发现 ,空泡界面瞬态特征的演化将导致空泡流噪声总声级随空泡数演化趋势的变化 。Cavitation reveals its miscellaneous patterns of flow and interface in different stages of develop- ment,which are strongly correlated with cavitation noise.By noise detection and flow pattern observation carried out on the axisymmetric bodies with hemispherical and 45 - degree conical headforms,the feature of cavitation noise in different stages was analyzed with the concept of total acoustic level.It was compared with the high- speed cinegraphically recorded patterns of cavity interface correspondingly.The results show that the evolution of interface pattern will bring about a certain trend variation in total acoustic level of cavitation noise.The transient characteristics of axisymmetric cavitation flow was conclusively discussed with the reference of two- dimensional status.

关 键 词：空泡流 轴对称体 噪声总声级 瞬态 

分 类 号：TV131.2[水利工程—水力学及河流动力学]