HEAT TRANSFER DURING GAS THROTTLING IN THE DOUBLE PLENUM CHAMBER OF A SHORT-DURATION WIND TUNNEL
S.A. Akinin, A.V. Starov, I.S. Tsyryul’nikov
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences (ITAM SB RAS), Novosibirsk, Russia
Keywords: numerical simulation, short-duration operation, throttling, heat loss, thermal insulation material, ceramics
Abstract
Three-dimensional unsteady numerical simulations of conjugate heat transfer in the gas-dynamic path of a short-duration wind tunnel are performed to assess the effect of heat losses on the airflow parameters. The contributions of individual path components to the stagnation temperature drop are analyzed, and the influence of the thermophysical properties of the throttling unit material is investigated. The results demonstrate the decisive role of the throttling unit material in heat losses and substantiate the need for thermally insulating throttling elements to maximize the reproducible stagnation parameters of the airflow.
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