磁流体加速技术对脉冲爆轰发动机增推影响的二维数值研究  

Two-Dimensional Numerical Study for Effects of MHD Accelerator Technology on Thrust Augmentation in Pulse Detonation Engine

作　　者：林玲[1] 翁春生[1] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,江苏南京210094

出　　处：《推进技术》2016年第5期985-991,共7页Journal of Propulsion Technology

基　　金：国家自然科学基金(11472138);中央高校基本科研业务费专项基金(30920130112007);国防预研基金(9140c300202120c30);南京理工大学研究生科研创新/实践计划项目

摘　　要：为了研究磁流体加速技术对脉冲爆轰发动机增推过程的影响,利用含磁流体运动的气液两相爆轰模型,同时采用CE/SE方法对含磁流体加速装置的脉冲爆轰发动机点火、爆轰及排气过程进行数值研究。模拟带磁流体加速器的脉冲爆轰发动机流场,揭示磁流体加速器的增推过程,分析磁流体加速器在不同磁感应强度及管长条件下对脉冲爆轰发动机推进性能的影响。计算结果表明:磁流体加速装置能够实现对脉冲爆轰发动机的推力补偿作用。磁感应强度及加速段管长增加,脉冲爆轰发动机的平均推力得到显著提高。加速段管长0.4m,磁感应强度2T时,平均推力可提高30.457%,此时推力提升率达到最大。The gas-liquid two-phase detonation model with magnetohydrodynamic was established to study how the MHD accelerator technology affects the augmentation in pulse detonation engine. The ignition , detona-tion and exhaust process of pulse detonation engine with MHD accelerator were calculated using the CE/SE meth-od. The flow field of pulse detonation engine with MHD accelerator was simulated. The mechanism of thrust aug-mentation of MHD accelerator was revealed. The effects of MHD accelerator on pulse detonation engine ＇s propul-sion performance under different magnetic flux density and length conditions were analyzed. Calculation results show that the MHD accelerator can be applied to the thrust compensation of pulse detonation engine. With the in-crease of magnetic flux density and acceleration section length,pulse detonation engine＇s average thrust increas-es remarkably. When the MHD acceleration section length is 0.4m and magnetic flux density is 2T, the average thrust increases by 30.457%,and the thrust increasing rate reaches the maximum.

关 键 词：脉冲爆轰发动机 磁流体 推力 流场 

分 类 号：V236[航空宇航科学与技术—航空宇航推进理论与工程]