Accession Number:

AD0761500

Title:

An Application of Laser-Raman-Spectroscopy to Thermochemical Measurements in an Arc-Heated Wind Tunnel Flow

Descriptive Note:

Final rept.

Corporate Author:

TECHNOLOGY INC DAYTON OH

Personal Author(s):

Report Date:

1972-12-01

Pagination or Media Count:

94.0

Abstract:

Laser Raman Scattering LRS has been investigated as a possible approach toward providing a nonperturbing flow calibration method for arc-heated wind tunnel facilities. Such a calibration is needed to evaluate the chemical and thermodynamic properties of the high temperature air flow which cannot be accurately determined using standard probe techniques. Theoretical calculations showed that the number densities and vibrational temperatures of nitrogen, oxygen, and nitric oxide could be obtained using the Raman spectroscopic method. Exploratory experimental LRS results obtained in the Air Force Flight Dynamics Laboratory 50-Megawatt Reentry Nose Tip RENT Facility showed that it is indeed feasible to apply LRS to arch-tunnel flow diagnostics.

Subject Categories:

  • Fluid Mechanics
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE