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一、关于标准节流流量计是有攸久历史的流量计,至今各国已反复做了许多实验。在节流流量计方面流量系数α和气体膨胀修正系数ε要从理论上进行算出几乎是不可能的,除实验以外没有别的方法。把某节流件做成与以前试验时节流件一样的几何图形,而且流体条件在力学方面相等的状态下使用时,即使不一一做试验求出α和ε,也可以原封不动的很好的使用已经由实验求出的α和ε的值。所谓标准,就是α和ε的实验报告书。内容是α和ε的
First, on the standard throttle meter is a long history of the flowmeter, so far has repeatedly done a lot of experiments in various countries. It is almost impossible to theoretically calculate the flow coefficient α and the gas expansion correction coefficient ε with respect to the throttle flow meter, and there is no other method than the experiment. When a throttle part is made into the same geometric shape as the throttle part of the previous test, and the fluid conditions are used in a state of equal mechanics, even if α and ε are not determined experimentally, they can be intact It is good to use values of α and ε that have been experimentally determined. The so-called standard, is the experimental report of α and ε. The content is α and ε