摘要
应用半球形轴对称头体做了一系列空化噪声实验，得到半球形头体在不同空化数及不同压力下的空化噪声谱．结果表明：头体的空化噪声总声级随空化数而变化，但噪声谱形具有明显的相似形．针对这种相似性，应用无量纲分析方法对噪声谱进行处理，提出了一个噪声声级与空化数的假设，将不同工况下的噪声谱归结到一条曲线上去．该曲线可以作为头体空化噪声谱的特征谱。
Cavitation noise of some kinds of hemisphere headforms was studied. Measurements of the different flow pattern's noise spectra of hemisphere headforms show that the total noise changes with the cavitation number, but there are many similarities among these shapes of the noise spectra. According to the similar form of the experimental noise spectra of axis symmetric headform, a relation between the total noise level and cavitation number was assumed and the noise spectra obtained in different experimental cases were merged into a characteristic one by means of dimensional method, which may be useful for the prediction of noise level in practice.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1999年第10期1210-1212,共3页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金
关键词
无量纲分析
噪声谱
轴对称头体
空化
non dimensional analysis
noise spectra
hemisphere headforms
