论文部分内容阅读
随着高水头大单宽流量泄水建筑物的兴建,出现了高速水流中的空化及空蚀问题.特别是由于某些建筑物因空地而产生了严重破坏,更加引起了人们对这一问题的重视.一般工程界都认为,严格控制泄水建筑物过水表面的不平整度是防止空化现象产生从而减免空蚀破坏的有效办法,流速越高,对过水表面不平整度的要求也越高.这样一来,对工程的施工工艺提出了很高的要求,因而,造价增加,这对一般工程,特别是中、小型工程是难以达到的.
With the construction of high-head large single-width discharge structures, cavitation and cavitation in high-speed water currents have emerged, especially as some buildings have been severely damaged due to open space, The problem of attention.General engineering circles agree that strict control of the surface of the building over the water drainage roughness is to prevent cavitation and thus reduce the cavitation damage effective method, the higher the flow rate, the water surface roughness As a result, high requirements are imposed on the construction process of the project, and therefore, the cost is increased, which is hard to achieve for general projects, especially for medium and small-scale projects.