根据爆炸力学、爆炸动力学和热力学理论，建立了瓦斯爆炸流场三维动态数学模型。
A 3-d dynamic mathematical model of gas explosion flow field was built based on explosion mechanics, explosion dynamic mechanics and thermodynamics.
由于气流在喷管流动中具有复杂的三维非定常的特征，因此，建立其动态数学模型有着更为重要的工程及理论价值。
In order to obtain transient mathematical model as vectoring deflection which is very important in engineering and valuable in theory, three-dimensional and unsteady flow fields must be researched.
对运动电弧作用下脉冲t IG焊接熔池流场与热场动态变化过程建立了三维数学模型。
A three-dimensional numerical analysis model of fluid flow and heat transfer in pulsed current TIG weld pool is developed.
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