验证用于初生空化数检测的比较法  

Verification of the comparative method for detecting cavitation inception number

作　　者：杨志明[1] 

机构地区：[1]武汉大学水利水电学院,武汉430072

出　　处：《水动力学研究与进展（A辑）》2009年第1期95-98,共4页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金资助项目(50579060)

摘　　要：该文作者在若干年前提出了用于初生空化试验的"比较法"的概念。方法的原理是:当初生空化数和消失空化数之差达到最小时,试验液体的抗拉强度就非常接近于零。由此;可以在不用专业仪器的情况下,检测不受液体抗拉强度影响的初生空化数。近年来的的研究成果证实了该"比较法"与使用检测仪器得到的成果具有相同的效果,进一步地验证和讨论了它的合理性。The author proposed a comparative method for detecting cavitation inception numbers a few years ago. Its principle is： comparing the desinent and the incipient cavitation numbers at the same oncoming flow speed, while the difference between the desinent and the incipient cavitation numbers reaches minimum, the test liquid is very close to have zero-tensile strength. Therefore in case of without professional instrument, the inception cavitation number can be detected without the influence of the tensile strength of the test liquid. Recently, the test results demonstrate that the comparative method can provide the same effectiveness as professional instrttment. It may show the rationality of the comparative method.

关 键 词：初生空化 消失空化 抗拉强度 空化比较 

分 类 号：TV131.32[水利工程—水力学及河流动力学] U472.9[机械工程—车辆工程]