The functioning of a removable elongated nozzle in the Hypersonic Aerodynamic Shock Tube

Presents the results of calculation and experimental research of an elongated nozzle block hypersonic aerodynamic shock tube of the laboratory of radiation gas dynamics IPMech RAS. The standard hypersonic conical nozzle was converted into an elongated nozzle with the form of the removable nozzle. The quasi-stationary gas flow through a new elongated nozzle block and the formation of a near-to-nozzle field of gas-dynamic parameters in a jet in a vacuum chamber are calculated. The braking pressures of the hypersonic flow at different distances from the nozzle section in the normal operation modes of the unit are experimentally measured. The calculated and experimentally measured braking pressures at the outlet of the elongated nozzle were compared, which showed a satisfactory match.