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Preliminary research on center body of adjusting plate second throat in transonic wind tunnel
Received date: 2017-04-17
Revised date: 2017-08-02
Online published: 2017-10-27
To meet the demand of the development of a new generation of aircraft projects, we need to improve the simulation precision of wind tunnel tests. The second throat, as the precision control system for the Mach number, can reduce the Mach number fluctuation and improve the stability of the test data. At present, from the perspective of structural configurations, the second throat can be divided into activity plugging block type, the choke finger and the adjusting plate type. In this paper, we study the adjusting plate second throat with the center body, and the effect of different types of the center body on the performance of the second throat. First, we analyze the aerodynamic performance of the second throat with different center body using numerical simulation method. Second,we design and process four types of the second throat for validation test in the pilot wind tunnel. The numerical simulation and test results show that the second throat with the extended board center body can perform the best in terms of the total pressure loss and flow control, and this program is adopted in the newly built large continuous wind tunnel.
Key words： second throat; center body; transonic wind tunnel; CFD simulation; test verification
CUI Xiaochun , MENG Fanmin , LI Qingli , ZHANG Ren , LI Xinglong . Preliminary research on center body of adjusting plate second throat in transonic wind tunnel[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017 , 38(11) : 121327 -121327 . DOI: 10.7527/S1000-6893.2017.121327
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