空化形成机理和比尺效应  

Summary of cavitation formation mechanism and scale effect

作　　者：杨庆[1] 张建民[1] 戴光清[1] 王海云[1] 

机构地区：[1]四川大学高速水力学国家重点实验室,四川成都610065

出　　处：《水力发电》2004年第4期56-59,共4页Water Power

基　　金：国家自然科学基金资助(NO :50209010)

摘　　要：高速水流容易发生空化,为进一步研究空化的形成机理和影响因素。对空化形成机理和液体粘性、表面张力、气核状况等影响因素的最新研究成果进行了综合分析。水流空化试验中存在比尺效应,指出并建立了空化比尺效应的经验公式。对空化机理的研究还有待进一步深入。The cavitation easily occurred in high-speed flow. In order to further study the formation mechanism and affecting factors of cavitation, therecent advances in cavitation researchs are reviewed, such as liquid viscous, surface tension, nuclear boundary conditions and pressure gradient which lead to incipient cavitation number. Because of scale effect in cavitation experiments, some experiential equations to correct scale effect on cavitation are stablished.But the study on the change mechanism should be made deeply.

关 键 词：空化 比尺效应 初生空化数 高速水流 

分 类 号：TV131.32[水利工程—水力学及河流动力学] TV136