颗粒注射速度对铝粉/空气两相旋转爆轰波的影响  

Effect of Particle Injection Velocity on Aluminum Powder/air Two-phase Rotating Detonation

作　　者：李世全 祝文超 孙方平 王宇辉 王健平[2] Waves LI Shiquan;ZHU Wenchao;SUN Fangping;WANG Yuhui;WANG Jianping(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;College of Engineering,Peking University,Beijing 100871,China)

机构地区：[1]北京化工大学机电工程学院,北京100029 [2]北京大学工学院,北京100871

出　　处：《兵工学报》2024年第4期1148-1157,共10页Acta Armamentarii

基　　金：国家自然科学基金项目(52076003);中央高校基本科研业务费专项项目(buctrc201913)。

摘　　要：为研究颗粒注射速度对非预混铝粉/空气旋转爆轰波传播特性的影响,通过采用离散相模型、具有有限速率动力学/扩散表面燃烧模型的一步表面反应、多步可逆气相分解反应以及考虑未完全燃烧颗粒的挥发,对注射温度为300 K的铝颗粒和来流总温为900 K的高温空气进行二维数值模拟研究。研究结果表明:由于入口附近颗粒注射速度低于空气的注射速度,空气三角区和颗粒三角区无法完全重合;当颗粒注射速度从1 m/s增加到100 m/s时,爆轰波的速度和温度先减小后增加;颗粒和空气在注入燃烧室时存在较大的温度差异,导致爆轰波不稳定传播;颗粒注射速度为70 m/s时,爆轰波的稳定性最好。The effect of particle injection velocity on the two-phase flow field of a rotating detonation engine fueled by aluminum powder and air is studied.The two-dimensional rotating detonation combustion for the aluminum particles with the injection temperature of 300 K and the high temperature air with the total inflow temperature of 900 K is simulated by using the discrete phase model,one-step surface reaction including kinetic/diffusion-limited rate surface combustion model and multiple-step gas phase decomposition reaction model and considering the devolatilization of incompletely unburned particles.Results show that the particle injection velocity near the inlet is lower than that of air,which results in an incomplete overlap between the air triangle and the particle triangle.As the particle injection velocity increases from 1 m/s to 100 m/s,the detonation velocity and temperature first decreases and then increases.There is a significant temperature difference between particles and air injected into the combustion chamber,which leads to unstable detonation wave propagation.The detonation wave has the best stability when the particle injection velocity is 70 m/s.

关 键 词：旋转爆轰波 颗粒注射速度 气固两相流 铝粉 传播特性 

分 类 号：V321.22[航空宇航科学与技术—人机与环境工程]