Based on the theory of the phase transition, gas dynamics, this dissertation set up the mechanical model of high speed natural gas flow with phase transition in Laval nozzle.
依据相变理论、气体动力学理论建立了描述有相变喷管中天然气高速流动的数学模型。
Air-absorbing equation has been set up by analysis of air absorbing principle at nozzle joint gap in the continuous casting process, the computing results are in accord with experiment analysis.
通过对连铸水口接缝吸气原理的分析。建立了水口接缝吸气方程，计算结果与试验分析基本吻合。
The drift of droplets in spraying diluted 2,4-D butyl ester emulsion by Yun-5 aircraft mounted the GP-81 nozzle has been studied, and a mathematical model has also been set up in this paper.
通过田间试验研究，探索了装配GP—81喷头的运五型飞机喷洒2，4—D丁酯乳油稀释液的雾滴漂移状况，建立了有关数学模型。
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