Numerical study on partition of axial fuelcooling case on electric fuel pump
                                                              WEI Renfeng1,  WANG Bin1,2,3, YE Zhifeng1,2,3
(1.College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016, China; 2.Jiangsu Province Key Laboratory of Aerospace Power System,Nanjing 210016, China; 3.Key Laboratory of Aeroengine Thermal Environment and Structure, Ministry of Industry and Information Technology, Nanjing 210016, China)

Abstract: Aiming at fuel cooling effects and reliability of electric fuel pumps, axial fuel cooling case structure for the pump was analyzed from aspects of temperature rise, evenness degree of fuel temperature and pressure drop along the cooling flow path. Fluid solid coupling numerical simulation was carried out for designing the number and layout of the axial partitions in the cooling case. A kind of varyingdistance cooling case was proposed and compared with the equidistant case. Influences of partition number from 8 to 32 on velocity, Reynolds number, pressure drop and temperature field distribution of fuel in the case were investigated, using equidistant and varyingdistance cooling cases respectively. The results indicate that 18partition cooling case creates heat emission saturation with regards to the pump of 8 kW rated power and 10% thermal loss. More than 18 partitions cannot lead to remarkable improvement on heat emission capacity but increasing pressure drop across the case and more even temperature distribution on the wall.

Key words: electric fuel pump; axial fuel cooling case; partition; heat emission capacity