Accession Number : AD0282729

Title :   ELECTRIC SHOCK TUBE FOR HIGH VELOCITY SIMULATION

Corporate Author : AVCO EVERETT RESEARCH LAB EVERETT MASS

Personal Author(s) : CAMM,JOHN C. ; ROSE,PETER H.

Report Date : JUL 1962

Pagination or Media Count : 1

Abstract : Shock tubes were developed capable of producing a gas sample of known conditions at velocities as high as 43,000 ft/sec. The driver of these shock tubes employs a capacitor bank which discharges electrical energy into helium, heating the helium to temperatures of 10,000 - 20,000 K, and raising the pressure to 10,000 - 20,000 psi. The high pressure bursts the scribed diaphragm and the resulting shock wave propagates into the test gas. Extensive diagnostic techniques were employed in the resulting hot gas samples. The growth of this sample was observed optically, and correlations were achieved with theoretical calculations. The observed radiation was compared with and can be used to extend the known radiative properties of high-temperature air. Time-resolved luminous pictures and spectra were also taken to show the purity of the test gas. The speed and attenuation of the shock front were measured. The observed operation of this shock tube was compared to theoretical predictions, and although no precise correlation can be made, the driver gas energy transfer and losses in the shock tube boundary layer can be accounted for. (Author)

Descriptors :   *ELECTRIC DISCHARGES, *FLUID FLOW, *SHOCK TUBES, BOUNDARY LAYER, CAPACITORS, ENERGY, GASES, GROWTH(PHYSIOLOGY), HELIUM, SAMPLING, TEMPERATURE, VELOCITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE