Calibration of the Versatile Platform and the Supersonic Integrated Section in CAAA

Abstract

Advancement on the improvement of transonic-supersonic flow field quality and compatibility for complicated testing facility was conducted in FD-12 Tri-sonic wind tunnel of China Academy of Aerospace Aerodynamics (CAAA). A newly-built transonic test section was supposed to be versatile and will promote the flight testing ability while obtaining testing data with higher accuracy. This versatile platform based on a modular structure could be used for different complicated flight testing by replacing the inner core while the shell and sustentation are shared. Furthermore, new supersonic test sections incorporating nozzle were built to eliminate the assembly step difference. New nozzle curves were designed and manufactured with test section wall divergence angle. The flow field quality will be improved by eliminating the residual shock waves which were caused by nozzle curves design methods and the steps from assembling for nozzle and test section. Flow field calibration test had been conducted to check the flow field uniformity in these new transonic and supersonic test sections. The calibration result showed that the flow field quality had achieved the classic requirement absolutely or proximally. Both the versatile section and incorporated supersonic section had been used in flight testing and more and more test technologies were developed.