Accession Number:

ADA254295

Title:

Shock Enhancement and Control of Hypersonic Combustion

Descriptive Note:

Annual technical rept. 1 Apr 91-31 Mar 92,

Corporate Author:

CALIFORNIA INST OF TECH PASADENA

Personal Author(s):

Report Date:

1992-06-18

Pagination or Media Count:

21.0

Abstract:

Experiments concerning the details of combustion in large vortices in the Caltech Unsteady Combustion Facility, using simultaneous measurements of pressure, shadowgraphy, and chemiluminescence are now about 50 complete. The detail of these results document a very different ignition mechanism and combustion pattern than previous experiments have suggested. Shock tube studies of shock enhanced mixing of helium into air, utilizing the Rayleigh scattering technique have been completed. Because of their greater sensitivity in the low concentration range, these measurements are significantly more accurate than those obtained with laser induced fluorescence and demonstrate that mixing is considerably more rapid and more complete than reported previously. Preliminary results have been obtained from experiments on the interaction of shock induced mixing with shear layers in the GALCIT M 2.5 supersonic wind tunnel.

Subject Categories:

  • Inorganic Chemistry
  • Fluid Mechanics
  • Optics
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE