Shock-Wave/Rail-Fasteners Interaction for Two Rocket Sleds in the Supersonic Flow Regime  

作　　者：Bin Wang Jing Zheng Yuanyuan Yu Runmin Lv Changyue Xu 

机构地区：[1]Key Laboratory of Aircraft Environment Control and Life Support,MIIT,Nanjing University of Aeronautics and Astronautics,Nanjing,210016,China [2]AVIC Aerospace Life-Support Industries,Ltd.,Xiangyang,441003,China

出　　处：《Fluid Dynamics & Materials Processing》2020年第4期675-684,共10页流体力学与材料加工（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11572154 and 11202100);Aeronautical Science Foundation of China(Grant No.2017ZD10002);the Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘　　要：Rocket sleds belong to a category of large-scale test platforms running on the ground.The applications can be found in many fields,such as aerospace engineering,conventional weapons,and civil high-tech products.In the present work,shock-wave/rail-fasteners interaction is investigated numerically when the rocket sled is in supersonic flow conditions.Two typical rocket sled models are considered,i.e.,an anti-D shaped version of the rocket sled and an axisymmetric slender-body variant.The dynamics for Mach number 2 have been simulated in the framework of a dynamic mesh method.The emerging shock waves can be categorized as head-shock,tailing-shock and reflected-shock.An unsteady large-scale vortex and related shock dynamics have been found for the anti-D shaped rocket sled.However,a quasi-steady flow state exists for the slender-body shaped rocket sled.It indicates that the axisymmetric geometry is more suitable for the effective production of rocket sleds.With the help of power spectral density analysis,we have also determined the characteristic frequencies related to shock-wave/rail-fasteners interaction.Furthermore,a harmonic phenomenon has been revealed,which is intimately related to a shock wave reflection mechanism.

关 键 词：Rocket sled shock wave dynamic mesh method ground effect 

分 类 号：O35[理学—流体力学]