在确定管路节流流量时,节流面积是一个重要的参数。对于一个简单的锐边节流通道来说,它的节流面积就是一个简单的圆形面积。但是对于针阀或锥阀,它的节流面积就不那么容易确定。事实上,关于节流面积,在文献资料中通常有着三个不同的提法。但是这三个提法都不能计算出某一特定条件下真正的最小面积,因而导致在流量计算中产生误差。 The throttling area is an important parameter in determining the throttling flow in the line. For a simple sharp-edged throttle passage, its throttle area is a simple circular area. But for the needle valve or cone valve, its throttle area is not so easy to determine. In fact, there are usually three different references in the literature regarding the throttle area. However, none of these three formulations calculate the true minimum area under a particular condition, resulting in errors in the flow calculation.