LIU Feng-hua. Test on aerodynamic performance of high-speed train in cryogenic wind tunnel[J]. Journal of Traffic and Transportation Engineering, 2018, 18(6): 93-100. doi: 10.19818/j.cnki.1671-1637.2018.06.010
Citation: LIU Feng-hua. Test on aerodynamic performance of high-speed train in cryogenic wind tunnel[J]. Journal of Traffic and Transportation Engineering, 2018, 18(6): 93-100. doi: 10.19818/j.cnki.1671-1637.2018.06.010

Test on aerodynamic performance of high-speed train in cryogenic wind tunnel

doi: 10.19818/j.cnki.1671-1637.2018.06.010
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  • Author Bio:

    LIU Feng-hua(1979-), female, senior engineer, liufenghua@cccar.com.cn

  • Received Date: 2018-06-21
  • Publish Date: 2018-12-25
  • The aerodynamic performances of China high-speed train HST, France high-speed train TGV and Germany high-speed train ICE3 were compared by testing them in a cryogenic wind tunnel.Based on the EN 14067 and TSI standards, the drag, lift and rolling moment of these trains under different yaw angles were tested on aluminum material models.Particle image velocimetry (PIV) was used to measure the flow field around the train, and the interaction mechanism and aerodynamic phenomenon between high-speed train and air were obtained.The calculation fluid dynamic (CFD) method was used to simulate the actual operation of high-speed trains, and the results were compared with those obtained from the cryogenic wind tunnel test.Research result indicates that under the yaw angle of 0°-10°, the order of absolute value of train drag coefficient from large to small is HST, ICE3 and TGV.When the yaw angle is 0°, the drag coefficients of the three kinds of trains are 0.223, 0.166 and 0.140, respectively.Under the yawangle of 0°-5°, the order of absolute value of train lift coefficient from large to small is TGV, ICE3 and HST, and their values are all close to 0. The lift forces of ICE3 and HST are positive and are pointed to the rail surface, the lift force of TGV is negative and the train receives an upward force.Under the yaw angle of 0°-5°, the order of absolute value of train rolling moment coefficient from large to small is TGV, HST and ICE3.When the yaw angle is 0°, the rolling moment coefficients of the three kinds of trains are 0.021, 0.019, and 0.011, respectively.Flow separation occurs at the transition of the head curved surface for the double-layer design of the HST high-speed train head.It increases the train friction and pressure drag and causes the drag coefficient of HST high-speed train to be larger than that of TGV and ICE3, but the drag coefficient is within the limit of 0.25 of the technical requirements for high-speed train head design, and the performances of lift force and rolling moment are superior.It makes the train have good stability.It can meet the aerodynamic engineering requirements of head design for high-speed train.

     

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