非定常前侧缘分离流的研究

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1995, Vol. 16 ›› Issue (6): 641-646.

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ANALYSIS OF UNSTEADY LEADING/SIDE-EDGE SEPARATED FLOW

Ji Zhou¹, Yin Xieyuan²

1. Department of Mechanics,University of Science and Technology,Hefei,230026;2. Center of Aerodynam ics Design and Research, North western Polytechnical University, Xi’an, 710072

Received:1994-03-07 Revised:1994-09-16 Online:1995-12-25 Published:1995-12-25

Abstract

Abstract: With unsteady vortex lattice method(VLM),impulsive starting and up ward ramp motion at constant angular rate are calculated for delta and rectangular wings. The results include unsteady pattern of leading/side edge vortex rollup and aerodynamic characteristics. Effects of the aspect ratio and angle of attack are analysed. Simulation results show that the upward ramp motion can significantly restrain the vortex breakdown and increase the lift coefficient.Present results are in convincing accordance with available experiments.

Key words: vortex lattice method, unsteady flow, deltawings, trapped vortices

CLC Number:

Ji Zhou;Yin Xieyuan. ANALYSIS OF UNSTEADY LEADING/SIDE-EDGE SEPARATED FLOW[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1995, 16(6): 641-646.

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ANALYSIS OF UNSTEADY LEADING/SIDE-EDGE SEPARATED FLOW

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