高超声速流 meaning in English

hypersonic speed flow

The cell - centred finite volume algorithm , nnd finite volume algorithm and ausm + finite volume algorithm are studied for solving the euler equations , their abilities for hypersonic problem are studied especially
本文分别对格心有限体积格式、 nnd有限体积格式和ausm +有限体积格式进行了研究，在求解euler方程的基础上，研究了它们对跨音速以及高超声速流场计算问题的解决能力。
But the nnd algorithm can " t reach 2 - order precision , and the cell - centred finite volume algorithm is not suit to solve hypersonic problem . for the efficiency of the four - stage runge - kutta time - stepping scheme is low , and the robust is bad for the hypersonic problem , an implicit time - stepping scheme is adopted . this scheme can preserve the results precision and improve the computing efficiency sharply , and is an innovation for the time - stepping scheme of unstructured grid
为了解决目前传统四步龙格一库塔时间推进效率较低、计算高超声速流场时鲁棒性较差的问题，本文改进并采用了一种隐式时间推进格式，能够在保证精度要求的情况下有效的提高流场计算时的计算效率，对基于非结构网格的时间推进格式有了发展和创新。