亚声速二喉道中心体构型研究

doi:10.7527/S1000-6893.2017.121327

Abstract

Abstract: In order to meet the demand of the development of new generation of fighter jets and large aircraft project and improve the level of wind tunnel test simulation of refinement, we need to upgrade the existing transonic wind tunnel. As the key technology of enhancing the ability of transonic wind tunnel, the second throat can control the Mach number precisely. At present, from the structural configurations, the second throat can be divided into activity plugging block type, the choke finger and the adjusting plate type. To the adjusting plate second throat with the center body, we studied different types of the center body affect the performance of the second throat. First we studied the aerodynamic performances of the second throat with different center body using numerical simulation method. Then we designed and processed four types of the second throat for validation test in the pilot wind tunnel. Finally, through the numerical simulation and experiment results, we concluded that the second throat with extended board center body per-formed best in terms of the total pressure loss and flow control, and adopted this project in the newly built large continuous wind tunnel.

Key words: second throat, center body, transonic wind tunnel, CFD simulation, experimental verification

CLC Number:

V211.754

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Research of the center body in the subsonic second throat

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