critical assumptions meaning in English

关键假设

Abstract : a numerical model and experiments over pmma are used to evaluate the main assumptions used in the theoretical description of a diffusion flame established in a natural boundary layer . flow characteristics ( 2 - d boundary layer ) and surface thermal balance are identified as the critical assumptions to be evaluated . comparison of experiments , numerical results , and theoretical model serve to validate the assumptions leading to the definition of a mass transfer number but establish the need to model all three - dimensional features of the flow
文摘:对pmma进行数字模拟和试验,对描述自然边界层扩散火焰理论的假设进行评价.我们把流动特性(二维边界层)和表面热平衡作为评价的关键假设.试验、数字模拟和理论模型证实了对质量传递数值定义的假设是正确的,但研究也表明,有必要对流动特性进行三维模拟