Accession Number:

ADA282941

Title:

Interaction of Chemistry, Turbulence, and Shock Waves in Hypervelocity Flow

Descriptive Note:

Annual technical rept. 15 May 1993-14 May 1994

Corporate Author:

CALIFORNIA INST OF TECH PASADENA GRADUATE AERONAUTICAL LABS

Report Date:

1994-05-01

Pagination or Media Count:

68.0

Abstract:

Significant progress was made during the first year of an interdisciplinary experimental, numerical and theoretical program to extend the state of knowledge and understanding of the effects of chemical reactions in hypervelocity flows. The program addressed the key problems in aerothermochiemistry that arise from interactions between the three strongly nonlinear effects Compressibility vorticity and chemistry. Important new results included Experimental data on the effect of enthalpy on transition in hypervelocity flow. First visualization of high-enthalpy turbulent boundary layer structure New data on hypervelocity flow over spheres, confirming computations and new theory Progress on methods of parallel computation of shock-vortex interaction. New computations of three-dimensional leeward reacting flow Development and tests of a greatly improved low-cost, thermocouple heat transfer gauge Upgrade of the supersonic shear-layer facility to all-hyperbolic operation. Exploration of this regime with a new Rayleigh scattering method Test of the validity of vibration-dissociation coupling models from shock tunnel data Successful application of new parallelized algorithm of the extended Schwinger multi-channel method to computation of electron-molecule collision cross-sections and Prediction and realization of a new non-intrusive diagnostic method, laser-induced thermal acoustics, for accurate measurement of sound speed and bulk viscosity. Chemical reaction, Shock wave, Vorticity, Hypervelocity, Shock-vortex interaction, Heat transfer gauges, Laser scattering, Laser-induced thermal acoustics, Vibration-dissociation coupling

Subject Categories:

  • Aerodynamics
  • Physical Chemistry
  • Fluid Mechanics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE