增程型无人机液体燃料贮箱结构设计与仿真

Structure Design and Simulation of Liquid Fuel Tank for Extended Range UAV

针对现实的飞行环境和绝热要求,对增程型无人机机载液体燃料贮箱的结构进行了创新设计。首次提出一种多段式斜坡内壁液体燃料贮箱,与普通结构贮箱从理论计算和仿真两方面对比说明新型结构的优异性能。建立增程型无人机机载液体燃料贮箱的整体传热模型,并对模型进行理论计算和仿真分析。研究和分析结果表明:新结构贮箱的液体燃料日蒸发率为0.464%,比目前同规格普通低温液氢容器的日蒸发率低30%~42%。

According to the realistic flight environment and thermal insulation requirements, the structure of the liquid fuel storage tank on board the extended range UAV was innovated. A multi-stage sloped inner wall liquid fuel tank is proposed for the first time. The excellent performance of the new structure is demonstrated by comparing with the conventional structure tank from both the oretical calculation and simulation. The whole heat transfer model of liquid fuel tank of extended range UAV is established, and the model is calculated and simulated. The results of research and analysis show that the daily evaporation rate of liquid fuel in the new tank is 0.464%, which is 30%~42% lower than that in the conventional cryogenic liquid hydrogen tank of the same specifications.