飞机燃油箱地面冷却惰化数值仿真  

3D Simulation of Ground Cooling Inerting of Aircraft Fuel Tanks

作　　者：王立群 范菊莉[1] 刘冠男 刘祎 潘俊[2] 冯诗愚[1] WANG Liqun;FAN Juli;LIU Guannan;LIU Yi;PAN Jun;FENG Shiyu(Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China;Nanjing Engineering Institute of Aircraft Systems,Nanjing Jiangsu 211106,China)

机构地区：[1]南京航空航天大学,江苏南京210016 [2]南京机电液压工程研究中心,江苏南京211106

出　　处：《海军航空大学学报》2022年第3期242-248,共7页Journal of Naval Aviation University

基　　金：国家自然科学基金委员会-中国民用航空局民航联合研究基金(U1933121);南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20200110);中央高校基本科研业务费专项资金;江苏高校优势学科建设工程。

摘　　要：通过COMSOL软件对飞机燃油箱地面冷却惰化进行了3D仿真,得到了燃油温度、气相空间温度、燃油蒸汽体积分数随时间变化的情况;研究了抽气流量、蒸发温度、内热源功率、外界空气流速对冷却惰化的影响。结果表明:内热源功率过大时,燃油蒸汽体积分数高于可燃体积分数下限,将不能惰化;增大抽气流量以及降低蒸发温度,可以更快地降低气相空间温度,惰化效果更好;外界空气流速越大,气动加热热量越大,油箱气相空间温度越高,但外界空气流速较大时,系统仍能惰化。3D simulation of ground cooling inerting of aircraft fuel tank is carried out by COMSOL software,the fuel temperature,gas-phase temperature and the volume fraction of fuel vapor with time are obtained,the influences of extraction flow rate,evaporation temperature,internal heat source power and external air velocity on cooling inerting are studied.The results show that the volume fraction of fuel vapor is higher than the lower flammable limit when the power of the internal heat source is too large,and the fuel vapor cannot be inerted;the increasing of the pumping flow rate and decreasing of the evaporation temperature can reduce the gas-phase temperature faster,and the inerting effect is better;the higher the external air velocity is,the greater the pneumatic heating heat is,the higher the tank gas phase temperature is,and inerting of system can still be realized when the external air velocity is larger.

关 键 词：冷却惰化 燃油蒸发 飞机燃油箱 气相空间温度 三维油箱仿真 

分 类 号：V228[航空宇航科学与技术—飞行器设计] TQ021.4[化学工程]