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根据拉伐尔喷嘴中气粉流的数学模型，采用四种不同的粒径分布，对喷嘴中气粉流的行为作了数值计算．计算结果表明．对于粉粒粒径不均匀的超声速气粉流，按平均粒径分布计算具有较大的误差．
According to the mathematical model of gas flow in Laval nozzle, four different particle size distributions are used to calculate the behavior of gas flow in the nozzle. calculations proves that. For the powder particle size is not uniform ultrasonic gas flow, according to the average particle size distribution has a larger error.