摘要
初生空化数由韦伯数W和空泡相对膨胀速度M所组成。在分析了中、德联合对比试验数据的基础上,发现W和M的关系呈一条对数直线。由模型试验得到直线方程后,再根据原型的空化数决定韦伯数,从直线上求得M值,有了W和M,就可得原型的初生空化数,从而判断在原型水流中是否发生空化。
The incipient cavitation number consists of Weber's number W and M- relative velocity of cavitation bubble explosion. On the base of the comparative test data of Germany and China, a straight line of logorithm relationship is established. Once the equation of straight line from the model test is known, according to cavitation number in prototype the W can be calculated and the M can be found on the straight line, thus from the W and M the incipient cavitation number in prototype is obtained and can be judged if the cavitation occurs in flow.
