导航

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (5): 122497-122497.doi: 10.7527/S1000-6893.2018.22497

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Experiment on nonlinear flow near perforated wall with slanted holes in transonic wind tunnel

LIU Guangyuan1,2, ZHANG Lin2, CHEN Dehua1,2, LIN Xuedong2, JIA Zhiliang2   

  1. 1. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China;
    2. High Speed Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China
  • Received:2018-06-29 Revised:2018-10-24 Online:2019-05-15 Published:2018-12-06
  • Supported by:
    National Natural Science Foundation of China (11802328); State Key Laboratory of Aerodynamics Foundation (SKLA2017-3-2); FengLei Youth Innovation Fund of CARDC (FLYIF20160014)

Abstract: To analyze the characteristics of the flow near the transonic perforated wall with slanted holes and to evaluate the nonlinear relationship of flow angle and pressure coefficient, an experiment on flow characteristics is conducted in the 0.6 m transonic and supersonic wind tunnel using seven-hole probe. The differential resistance of flow in perforated wall region, as well as the influence of Mach number and model lift are analyzed using distributions of flow angle and pressure coefficient. Finally, based on the experimental results, a differential method for calculating the porosity parameter of perforated wall with slanted holes is developed and compared with the classical methods. The results indicate that the flow near perforated wall with slanted holes has significant differential resistance and nonlinearity. In the range of negative pressure difference, the flow near the wall is still dominated by outflow. At high subsonic speeds, the perforated wall flow characteristics tend to be solid in the model area for the empty tunnel condition. With the model installed, perforated wall flow tends to enhance the inflow as the lift increases in the opposite area of lift surface, and the perforated wall flow characteristics tend to be open boundaries.

Key words: perforated wall with slanted holes, flow characteristics, nonlinearity, differential resistance, seven-hole probe, transonic wind tunnel

CLC Number: