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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (5): 122434-122434.doi: 10.7527/S1000-6893.2018.22434

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Effect of propeller slipstream on wake field of a nacelle/wing configuration

DENG Lei1, DUAN Zhuoyi2, QIAN Ruizhan2, XU Ruifei2, GAO Yongwei1   

  1. 1. National Key Laboratory of Science and Technology on Aerodynamic Design and Research, Northwestern Polytechnical University, Xi'an 710072, China;
    2. AVIC The First Aircraft Institute, Xi'an 710089, China
  • Received:2018-06-11 Revised:2018-07-06 Online:2019-05-15 Published:2018-07-27

Abstract: The slipstream of propeller greatly influences the flows on wings and wakes due to high swirl velocities, and thus alters the performance of the wing and the aircraft. In this paper, the effects of propeller slipstream on the wake flow are investigated using wind tunnel test. The experimental model includes a 6-bladed propeller, a nacelle and a wing with high lift device at the sweep angle of 4°, and two configurations of flap deflection or retraction are tested. The thrust coefficient and advance ratio of two configurations at real flight are simulated at the same time. By comparing the flow velocities and directions at the wake with and without propeller slipstream, the development and influence of slipstream on wake flow are analyzed, and the slipstream effects including accelerating effect, downwash effect and sidewash effect are investigated. The test results show that, under the influence off slipstream, the flow parameters in far wake show complex variation on horizontal and vertical directions; and a clear distinction of the slipstream effects is shown under flap-deflection and retraction configurations.

Key words: propeller, slipstream, nacelle, wing, wake measurement, wind tunnel test

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