Accession Number:

ADA248558

Title:

Shock Enhancement and Control of Hypersonic Combustion

Descriptive Note:

Annual technical rept. 1 Apr 1990-30 Mar 1991,

Corporate Author:

CALIFORNIA INST OF TECH PASADENA

Personal Author(s):

Report Date:

1991-11-26

Pagination or Media Count:

17.0

Abstract:

Shock tube studies of shock enhanced mixing of helium into air were reported utilizing the Rayleigh scattering technique. Because-of-their greater sensitivity in the low concentration range, these measurements were believed to be more accurate than those obtained with laser induced fluorescence. The result indicated that mixing was more rapid and more complete than reported previously. Preliminary work on the consequence of multiple shocks has been promising. Work began on the interaction of shock induced mixing with shear layers in the GALCIT M 2.5 supersonic wind tunnel. Experiments concerning the details of combustion in large vortices in the Caltech Unsteady Combustion Facility progressed very well using simultaneous measurements of pressure, shadowgraphy, and chemiluminescence. These results reveal a very different ignition mechanism and combustion pattern than had been anticipated.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE