浮空平台用于区域空间无线接入探讨

目前的地面蜂窝通信系统已暴露不少弱点,本文提出了基于浮空平台的无线接入系统用于区域空间无线通信的解决方案,既开辟了信息资源,解决人口密集地区增加移动通信用户的问题,又可解决农村和受灾地区通信线路的困难。     

Curvature Effect on Compressible Turbulent Flow over a Wavy Wall

A fully developed compressible turbulent flow in a channel with a lower wavy wall and a upper plane wall is studied using large eddy simulation. We mainly attempt to deal with the curvature effect on compressible turbulent flow over the wavy wall. Some typical quantities including the mean turbulence statistics, dilatation and baroclinic terms in the enstrophy equation, turbulent kinetic energy budgets and the near-wall turbulent structures are analysed. The results obtained in this study provide physical insight into the understanding of the effects of curvature and compressibility on wall-bounded compressible turbulent flow.