基于CFD的轻质燃油舱吸入口流动特性仿真研究

The flow characteristics research on the suction port of light fuel tank pipeline based on CFD simulation

为研究轻质燃油舱中的日用舱和储油舱油舱吸入口流动特性,本文通过CFD仿真建立了日用舱和储油舱喇叭口、上斜口及增大储油舱集油槽后的吸入口有限元模型,模拟储油舱向日用舱进行油料调拨及使用日用舱向目标进行油料加注时油舱吸口周围的流动特性,采用湍流模型模拟实际流动状态。通过改变流动域、边界条件等设置,对不同油舱的不同吸入口形式进行CFD仿真,得到系列速度流线规律。仿真结果表明:1)同样布置情况下,采用上斜45°吸口相比于喇叭口吸口对集油舱内部扰动影响较小;2)吸入口相对于舱底、舱壁的布置位置对集油槽内流体扰动情况影响较大,在设计中需特别关注。

In order to study the flow characteristics of the fuel tank intake ports of the day tank and the storage tank in the light fuel tank,in this paper,the finite element models of the intake ports of the day tank and the storage tank with flared and upward sloped ports and enlarged fuel tank collector tanks were established by CFD simulation to simulate the flow characteristics around the tank intake ports of the storage tank when transferring the fuel to the day tank and refueling targets using the day tank,and the turbulence model is adopted to simulate the actual flow conditions.The turbulence model is used to simulate the actual flow state.By changing the flow domain and boundary conditions,CFD simulations are carried out for different suction ports of different fuel tanks,and series of velocity streamlines and cloud diagrams are obtained.The simulation results show that:1)under the same arrangement,the use of upward slanting 45°suction port has less influence on the internal disturbance of the oil collecting tank compared with the flared suction port;2)the position of the suction port in relation to the bilge and the bulkhead has a greater influence on the fluid disturbance in the oil collecting tank,which needs to be paid special attention to in the design.