泄水建筑物若干体型初生空化数的合理取值

 在泄水建筑物高速水流防空蚀水力设计中，通常用水流空化数与初生空化数对比，判别该部位(或体型)是否发生空化。关于体型的初生空化数，一般应通过减压试验确定，而在初步设计优选体型过程中，通常就需知其初生空化数。在前人研究成果基础上，通过综合分析，提出若干体型初生空化数，可供当工程不具备进 行减压试验情况下，设计和科研人员参考。

Rational determination of incipient cavitation numbers for some configurations in hydraulic strutucres

To compare the values between the flow cavitation number and incipient cavitation number for discriminating whether the cavitation will occur at some position or configuration is usually adopted in the cavitation free design of spillways with high velocity flow. The incipient cavitation number should be generally determined by the model test in vacuum tank. But even in the preliminary design stage, the incipient cavitation number must be known to optimize the configuration.On the basis of previous studies, through synthetic analysis, the incipient cavitation numbers of some configurations are proposed. These data may be used in engineering and research works, especially, when there is no possibility to conduct model test in vaccum tank.