INVESTIGATION OF THE STRUCTURE AND CHARACTERISTICS OF A NONSTATIONARY SUPERSONIC GAS JET PRODUCED BY A PULSE GENERATOR

The initiation of a shock wave in the gas space of a pulse generator, the exit of this wave from the generator nozzle, and the formation of a nonstationary gas-jet fl ow downstream of the nozzle exit section were experimentally investigated and numerically simulated as applied to the installations for the gas-pulse cleaning of heat transfer surfaces. An experimental investigation of the structure of a nonstationary underexpanded supersonic gas jet discharging from the generator nozzle into an immersed space and propagating along a side screen modeling a heat transfer surface cleaned was performed on an air stand. The shock-wave and vortex structures of such a jet were numerically investigated in detail by the method used for the simulation of large vortices.
   
Author:  K. N. Volkov, V. N. Emel′yanov, A. V. Efremov, A. I. Tsvetkov, P. S. Chernyshov
Keywords:  gas-pulse cleaning, pulse generator, shock wave, supersonic underexpanded jet, vortex-resolving simulation
Page:  1255