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小小星ABC

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[求助] 关于水蒸气流速计算,,求大神可以帮助小弟

老师做了喷气嘴,在有限的实验条件下,我测定了氮气压力从0.1mpa到0.5mpa下喷气口出口处对应的流速,怎么利用氮气压力下的流速数据转化成125摄氏度下水蒸气在相同压力下的流速呢??有木有相关的公式???或有木有好的方法直接测得高压水蒸气的流速的?求大神解答,先谢谢啦,,急需
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