Aerodynamics of ducted re-entry vehicles  

作　　者：C.ANBU SERENE RAJ M.NARASIMHAVARADHAN N.VAISHNAVI S.ARUNVINTHAN A.AL ARJANI S.NADARAJA PILLAI 

机构地区：[1]Turbulence&Flow Control Lab,School of Mechanical Engineering,SASTRA Deemed University,Tamil Nadu 613401,India [2]College of Engineering,Prince Sattam Bin Abdelaziz University(PSAU),Alkharj 11942,Saudi Arabia

出　　处：《Chinese Journal of Aeronautics》2020年第7期1837-1849,共13页中国航空学报（英文版）

基　　金：supported by Research and Modernization Fund;SASTRA University(No.R&M/0035/So ME008/2015-17)。

摘　　要：Ballistic parameter plays a major role in determining the re-entry trajectory.Lower ballistic coefficient offers an optimal re-entry,wherein the vehicle decelerates higher up in the atmosphere thereby decreasing the imposed aerothermal loads.The current computational study proposes an add-on,to the existing Orion-based re-entry vehicle:a duct circumventing the capsule from the shoulder to the base,to improve the aerocapture ability of the re-entry vehicle.The design cases are categorised based on a non-dimensional parameter termed the Annular Area Ratio(AAR).Dragand ballistic coefficient of the Ducted Re-entry Vehicles(DRVs)at various Mach numbers are evaluated and compared with those of the baseline model.The results show that the proposed design increases the drag for all the AARs considered in the subsonic regime.In the supersonic regime,ducted models of higher AAR are more promising with the increase in Mach number.DRVs also exhibit lower ballistic coefficients than their baseline counterparts.

关 键 词：Aerocapture Annular area ratio(AAR) Ballistic coefficient CFD RE-ENTRY 

分 类 号：V411[航空宇航科学与技术—航空宇航推进理论与工程]