节流面积是确定管路节流量的重要参数。对于简单的锐缘节流孔来说,节流面积是个简单的圆面积。但是,对针阀或提动阀来说,节流面积就不那么容易确定。事实上,虽然文献中对节流面积一般有三种不同的规定,但内中没有一种规定适合计算实际最小节流面积,因而造成了流量计算的误差。 Throttling area is an important parameter to determine the amount of pipe throttling. For simple sharp orifice, throttle area is a simple circular area. However, throttle or poppet valves, throttle area is not so easy to determine. In fact, although there are generally three different regulations governing the area of ​​throttling in the literature, none of these provisions apply to the calculation of the actual minimum throttling area, resulting in errors in the calculation of the flow rate.