TsAGI scientists conduct fundamental research in the Institute’s industrial transonic tunnel
12 August 2016
The scientists of the Central AeroHydrodynamic Institute named after professor N.E. Zhukovsky (part of the National Research Center ‘Institute named after N.E.Zhukovsky‘) improved the procedure of comprehensive experimental research in a transonic wind tunnel.
The system is widely used in the manufacture of modern aircraft equipment such as the advanced airliners SSJ100, MS-21, etc. Therefore, it is vital to verify the reliability of a transonic tunnel and the quality of the output data and improve the procedure of wind tunnel testing on a regular basis. All these tasks are handled as part of the fundamental research conducted by TsAGI experts.
This time, a pointed cone was chosen as a test case with the detailed results for checking and setting up of analytical and calculation methods. The output data will allow evaluating the air flow quality through comparison of the system’s aerodynamic performance with the results obtained previously by NASA experts during a flight test experiment where a similar cone was mounted on a fighter nose part.
Different parameters such as heat and pressure distribution and oscillatory pressures on the surface and in the cavity of the cone, on the walls of the tunnel test section, airloads, etc. were measured in the transonic tunnel simultaneously. During the experiment, the Institute experts also checked the position of the laminar-to-turbulent transition of the boundary-layer air on the cone surface, i. e., variation of the air flow nature from laminar (laminated) to turbulent (chaotic).
TsAGI scientists collected large quantities of data that need to be further systematized and analyzed. The Institute experts will compare aerodynamic characteristics obtained during the transonic tunnel testing to the flight test results of the cone with similar geometry and the research in TsAGI supersonic tunnel and foreign systems.
The research work is performed under contract with the Ministry of Industry and Trade of the Russian Federation.