有关近空间高超声速飞行器边界层转捩和湍流的两个问题  

Two problems in the transition and turbulence for near space hypersonic flying vehicles

作　　者：周恒[1] 张涵信[2] 

机构地区：[1]天津大学力学系,天津300072 [2]中国空气动力研究与发展中心国家计算流体力学实验室,北京100191

出　　处：《空气动力学学报》2017年第2期151-155,共5页Acta Aerodynamica Sinica

摘　　要：和一般的飞行器一样,在近空间飞行器的研制中,其边界层的转捩和湍流也是需要考虑的两个重要问题。但即使是对一般的飞行器,"转捩"和"湍流"也还是两个历经百年而仍未很好解决的问题,而对近空间飞行器来说,空气动力学本身就还存在若干新的需要研究解决的基础问题,边界层的转捩和湍流就更是没有很好解决的问题。本文讨论了两个问题:1)为增强对高超声速飞行器边界层转捩预测的能力,需要开展哪些方面的研究工作及其困难;2)是否有可能当飞行器飞行高度足够大时,其边界层就不会再有湍流问题?For the research and development of near space flying vehicles, also as the same for conventional flying vehiclessuch as airplanes, the problems of transition and turbulence of the boundary layers are two important issues must be taken into consideration. However, even for conventional flying vehicles, these two problems are still not fully resolved, even though the investigations have been lasted for more than 100 years already. For near space flying vehicles, not only the related aerodynamics has its own unsolved fundamental scientific problems, let along the problems of transition and turbulence. In this paper, two related problems are focused on= 1） In order to enhance our capability of predicting the transition of the boundary layer of a hypersonic flying vehicle, what kinds of research work should we do and what difficulties we might face？ 2） Would it be possible that there would be no problem of turbulence for its boundary layer if the attitude of the flying vehicle is sufficiently high？

关 键 词：近空间飞行器 转捩 湍流 预测能力 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]