最近临界喷嘴作为气体流量的标准计量器具得到越来越广泛的应用。喷嘴几何形状对流最系数的极重要影响和当前缺乏应用型喷嘴的标准导致了必须单个地对微型喷嘴进行标定。但是,如果不断进行实验研究,要制定这样的标准是不可能的。这种情形迫使人们研制各种 Recently, critical nozzles have become more and more widely used as standard measuring instruments for gas flow. The extremely important effect of nozzle geometry on the convection factor and the current lack of application-type nozzles have led to the need to individually calibrate the micro-nozzles. However, it is impossible to develop such a standard if we constantly conduct experimental research. This situation forces people to develop a variety of