斜切反喷管粘性流场数值模

推进技术 ›› 1996, Vol. 17 ›› Issue (1): 24-28.

斜切反喷管粘性流场数值模

陈林泉,姜刚,侯晓

陕西动力机械研究所;陕西动力机械研究所;陕西动力机械研究所

发布日期:2021-08-15

NUMERICAL SIMULATION OF VISCOUS FLOWFIELD IN A SCRAFED REVERSAL NOZZLE

Shanxi Power Mechanical Inst., Xi’an, 710025;Shanxi Power Mechanical Inst., Xi’an, 710025;Shanxi Power Mechanical Inst., Xi’an, 710025

Published:2021-08-15

摘要/Abstract

摘要： 为了在级间分离期间提供反推力，许多固体火箭发动机前端都装有一组斜切反喷管，由于反喷管气动型面具有尖点，并在超音速区有台阶，喷管内存在一系列激波，并伴有流动分离现象。从雷诺平均的非定常Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程出发，利用时间相关法，采用ＭａｃＣｏｒｍａｃｋ两步显格式，结合Ｂａｌｄｗｉｎ－Ｌｏｍａｘ代数湍流模型，数值模拟了斜切反喷管流场。计算得到的壁面压强分布与风洞吹风实验测得的压强分市相当一致。

关键词: 推力反向;特型喷管;计算流体动力学;数值模拟

Abstract: any solid propellant motors use a set of scrafed reversal nozzles located on the forward of the motors to provide reversal thrust during staging. Because the gasdynamic contour of reversal nozzle is not smooth and has a step in supersonic flow region, a series of shocks and flows separation in boundary-layer exists in flowfield of reversal nozzle. The viscous flowfields in scrafed reversalnozzle are simulated based on Renolds--average unsteady Navier--Stokes equations, with time-dependent method, MacCormack explicit scheme and Baldwin-Lomax algebraical turbulent model. Thepressure distributions obtained from computation are in good agreement with experimental data.

Key words: Thrust reversal;Unconventional nozzle;Computational fluid dynamics;Numericalsimulation

陈林泉,姜刚,侯晓. 斜切反喷管粘性流场数值模[J]. 推进技术, 1996, 17(1): 24-28.