文献类型：期刊文献

英文题名：Numerical Study of Thrust Eccentricity of Pintle Nozzle in Solid Rocket Motor with Variable Thrust

作者：Cui, Zuo Ma, Zheng Ding, Yong

第一作者：Cui, Zuo

通信作者：Cui, Z[1];Cui, Z[2]

机构：[1]Guizhou Inst Technol, Sch Aerosp Engn, Guiyang, Peoples R China;[2]Guizhou Sci & Technol Innovat Leading Talent Stn A, Guiyang, Peoples R China;[3]Guizhou Univ, Sch Mech Engn, Guiyang, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Aerosp Engn, Guiyang, Peoples R China;corresponding author), Guizhou Sci & Technol Innovat Leading Talent Stn A, Guiyang, Peoples R China.|贵州理工学院;

年份：2026

外文期刊名：INTERNATIONAL JOURNAL OF AERONAUTICAL AND SPACE SCIENCES

收录：;EI(收录号：20263221276324);Scopus(收录号：2-s2.0-105046824584);WOS:【SCI-EXPANDED(收录号:WOS:001843293900001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 12002097, No. 12262006), Guizhou Provincial Major Scientific and Technological Program (XKBF (2025) 031), and Guizhou Science and Technology Innovation Leading Talent Workstation (KXJZ (2025) 024).

语种：英文

外文关键词：Thrust eccentricity; Pintle nozzle; Valve opening; Inlet pressure; Pintle profile

摘要：Compared with conventional solid rocket motors (SRM), solid rocket motors with pintle nozzle have unique advantages in the thrust regulation and mission maneuverability. But a phenomenon that thrust vector deviates from the axis of symmetry (i.e., thrust eccentricity) is always unavoidable, which can produce lateral force and affect the precise control of aircraft. In present study, the characteristics of thrust eccentricity are explored by establishing the numerical model of pintle nozzle, and the model accuracy is validated by the experiments of cold flow. Four potential factors that affect the thrust eccentricity, including the opening valve, the inlet pressure, the inlet angle and the pintle profile, are analyzed and evaluated by the eccentricity angle. The results show that the thrust eccentricity is caused by inherent asymmetry of internal flow field, which is caused by the side-inlet configuration of pintle nozzle. The eccentricity angle is significantly increased with both the valve opening and the inlet pressure, and it can be reduced by decreasing the inlet angle of fluid flow. Furthermore, an elliptical pintle profile can minimize the thrust eccentricity effectively, when compared with the linear profile. Across all investigated conditions, the overall thrust eccentricity angle ranges from - 0.70 degrees to 2.65 degrees. The results provide references for reducing the influences of eccentricity thrust, and can be used to design the pintle nozzle in solid rocket motor with variable thrust.