弹道学报2025，Vol.37Issue(2)：21-30,10.DOI:10.12115/ddxb.2023.12002
喷管对水下爆轰发动机推力性能影响的数值模拟研究
Numerical Simulation Study on the Influence of Nozzle on Thrust Performance of Underwater Detonation Engine
摘要
Abstract
To study the thrust performance of underwater detonation engine(UDE),the thrust calculation method for the simplified UDE model was derived.Based on the VOF multiphase-flow model,the UDE with different nozzle-configurations using air as oxidant and gasoline vapor as fuel was numerically simulated.The thrust source of UDE and the propulsion performance of the engines under different equivalence ratios and nozzle configurations were discussed.The results show that the thrust sources of UDE mainly include three parts:internal thrust wall,annular thrust wall and nozzle wall.The thrust of internal thrust wall contributes more than 67%to total thrust,and the thrust of annular thrust wall contributes more than 16%to total thrust.The complex wave system and detonation products at the engine outlet interact with the engine wall,creating multiple peaks in the thrust curve of UDE.After installing different nozzles,the nozzles have a significant effect on the improvement of thrust performance.The convergent nozzle can enhance the intensity of the reflected shock wave of underwater detonation,but the negative thrust brought by the nozzle wall reduces the specific impulse and average thrust by 11.31%compared with the straight nozzle.The expansion nozzle weakens the transmission shock wave and reflection shock wave of underwater detonation,but the increase of the pressure area of the nozzle increases the specific impulse and average thrust by 28.09%compared with the straight nozzle,significantly improving the propulsion performance of UDE.关键词
水下爆轰发动机/激波/推力/喷管构型Key words
underwater detonation engine/shock wave/thrust/nozzle configuration分类
力学引用本文复制引用
顾津,康杨,李宁,黄孝龙,李灿,翁春生..喷管对水下爆轰发动机推力性能影响的数值模拟研究[J].弹道学报,2025,37(2):21-30,10.基金项目
国家自然科学基金青年基金项目(12302438) （12302438）
江苏省自然科学基金资助项目(BK20220919) （BK20220919）
瞬态物理重点实验室基金项目(6142604210203) （6142604210203）
