Aerodynamic characteristics of vertical recovery of rocket sub-stage and influence of engine nozzle

JIA Hongyin; ZHANG Peihong; ZHAO Wei; ZHOU Guiyu; WU Xiaojun

doi:10.7527/S1000-6893.2020.23995

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2021 , Vol. 42 >Issue 2: 623995 - 623995

DOI: https://doi.org/10.7527/S1000-6893.2020.23995

Special Topic of Aerodynamic Design of Advanced Space Transportation Sytem

Aerodynamic characteristics of vertical recovery of rocket sub-stage and influence of engine nozzle

JIA Hongyin ,
ZHANG Peihong ,
ZHAO Wei ,
ZHOU Guiyu ,
WU Xiaojun

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Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China

Received date: 2020-03-21

Revised date: 2020-07-13

Online published: 2020-08-03

Supported by

National Numerical Wind tunnel Projetct; National Key R&D Technology Project(18-H863-03-ZT-001)

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Abstract

The vertical recovery reusable launch vehicle is an important direction in the development of launch vehicles. The vertical reentry process with a large slenderness ratio is a typical irregular flow around the blunt body, with aerodynamic characteristics significantly different from those of traditional low drag streamline body vehicles. In this paper, the basic aerodynamic characteristics of the vertical recovery configuration and the flow around the irregular blunt body based on the grid fins were studied by means of wind tunnel tests and numerical simulation analyses. The influence quantities of the exposed nozzles and grid fins on the vertical recovery aerodynamic characteristics of the rocket sub-stage were obtained, and the vertical recovery layout design suggestions were given. The results indicate that the shoulder region will generate large separation flow at a small angle of attack when the rocket sub-stage reenters into the air. A strong separation vortex structure will be induced on the left and right sides of the nozzles, which will interact with the tail of the rocket and the large separation flow produced by the shoulder. The resistance of the vertical recovery configuration will always be at a high level with the supersonic speed, and the movement of the pressure center will be large with different Mach numbers. The exposed nozzle of the rocket engine will produce a large disturbing static instability moment when flying backward, with its magnitude basically the same as the static stability control moment provided by the gird fins. Attention should be paid to the design of the vertical recovery scheme of the rocket sub-stage.

Key words： rocket vertical recovery; irregular blunt body; grid fins; aerodynamic layout; aerodynamic characteristics

Cite this article

JIA Hongyin , ZHANG Peihong , ZHAO Wei , ZHOU Guiyu , WU Xiaojun . Aerodynamic characteristics of vertical recovery of rocket sub-stage and influence of engine nozzle[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021 , 42(2) : 623995 -623995 . DOI: 10.7527/S1000-6893.2020.23995

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