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 simula-tion 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 rela-tion 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.
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