Development of a method for determining flow parameters in impulse wind tunnels
Yu.V. Gromyko, I.S. Tsyryulnikov, A.A. Maslov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Keywords: high-enthalpy short-duration facility, calculation of flow parameters, method of two thermocouples, velocity, PIV method
Abstract
Known approaches to the determination of flow parameters in the test section of impulse wind tunnels are analyzed, and ways towards their improvement are outlined. An algorithm for calculating flow parameters in short-duration supersonic high-enthalpy wind tunnels using the experimental values of pressure in the prechamber, the total pressure behind the normal shock, and the flow velocity and stagnation temperature as a function of time, is developed. It is shown that the results of measurements and calculations using the developed algorithm for determining flow parameters fairly well comply with the calculations of flow parameters based on the gas-dynamic relations taking into account the losses of heat in the working path of the wind tunnel.
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