A 1-FOOT HYPERVELOCITY SHOCK TUNNEL IN WHICH HIGH-ENTHALPY, REAL-GAS AIR FLOWS CAN BE GENERATED WITH FLOW TIMES OF ABOUT 180 MILLISECONDS

摘要

A shock tunnel is described in which high-enthalpy, real-gas air flows can be generated with flow times of about l8o milliseconds. This shock tunnel is operated with a combustion-heated driver gas and consists of a combustion chamber, shock tube supersonic nozzle, test section, and vacuum tank. An essential feature of this shock tunnel is a means for achieving a constant-pressure air reservoir for the duration of the test. Air streams with velocities in excess of 14,000 feet per second have been achieved at a Mach-number of about 10. The corresponding stream total enthalpy is about 4,500 Btu/lb and the stagnation pressure is 3.25 psia.