初生空化比尺效应的讨论和验证  

Discussion and new checking of scale effects for cavitation inception

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）》2008年第5期580-584,共5页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金资助(50579060)

摘　　要：讨论了在常规循环水洞或在减压箱中进行模型空化试验时,关于初生空化比尺效应的不同观点。指出了在(?)压箱空化试验中使用的相似律存在的缺陷。为了有效研究初生空化比尺效应,规范液体的抗拉强度为零是必要的。用最新试验成果-喷嘴的初生空化特性,再次验证了经验的初生空化比尺效应。Some different viewpoints on scale effects of cavitation inception testing in a normal water tunnel or in vacuum tank were discussed respectively. Some defects in similarity-law of cavitation model test in vacuum tank were pointed out, and it is necessary to standardize the zero-tensile-strength of liquid for cavitation inception tests effectively. The empirically evaluated relation for the scale effects were checked again by new results of cavitation inception tests using submerged nozzles.

关 键 词：空化 喷嘴 比尺效应 

分 类 号：TV131.2[水利工程—水力学及河流动力学]