民机风洞试验半模垫板高度对气动特性的影响

doi:10.7527/S1000-6893.2016.0229

Abstract

Abstract:

Half model simulation, as a method to get higher test Reynolds number, is widely used in the design of large commercial transport aircrafts. This paper reviews the pros and cons of the half model simulation, and then studies the peniche simulation which is widely accepted. The mechanism of the effect of the peniche height on aerodynamic characteristics is studied. CFD simulation is found to agree well with the experimental result. The boundary layer thickness of the middle of the wind tunnel test section can be better simulated by using velocity distribution inlet condition, and the simulation results are more close to the experimental results. With the increase of peniche height, lift coefficient increases, drag coefficient decreases and pitching moment coefficient increases. The upwash induced by peniche in the coming flow in front of the wing increases the local angle of attack by 5% and dynamic pressure by 1% along the full span, thus making the pressure distribution more negative. Different from the traditional concepts that the upwash induced by peniche can only affect the inboard wing, results show that the peniche effects extend to the whole span. The prime factor is the increase of the local angle of attack. The effects of peniche heights vary with the spanwise location, having more impacts on the inboard wing. The results can be better used in the half model wind tunnel test with certain engineering practicability.

Key words: half model, wind tunnel test, peniche, boundary layer, aerodynamic characteristics

CLC Number:

V211.753

WANG Jiming, LIU Yipeng. Effects of half model peniche height on civil aircraft aerodynamic characteristics in wind tunnel test[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(5): 120429-120429.

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Effects of half model peniche height on civil aircraft aerodynamic characteristics in wind tunnel test

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