可逆式孔板流量计和可变式孔板流量计

Reversible Orifice Flowmeter and Changing Orifice Flowmeter

分析了可逆式孔板流量计和可变式孔板流量计的设计原理和实验结果。前者与流体流动方向无关，后者低速流的测量精度高。高速流的压头损失较小，是具有一定实用价值的新型孔板流量计。

The design element and the experiment result of reversible orifices and changing orifices low velocity flow is high.The drany wastage of high velocity flow is small. It is a new type of orifice flowmeter which has practical value.