Accession Number:

ADA522512

Title:

Progress in Applying Tunable Diode Laser Absorption Spectroscopy to Scramjet Isolators and Combustors

Descriptive Note:

Final rept. 1 Sep 2006- 10 May 2010

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION SCIENCES BRANCH

Report Date:

2010-05-01

Pagination or Media Count:

37.0

Abstract:

Development of advanced propulsion systems of interest to the Air Force requires study of the harsh physical environments associated with reacting flows characterized by extremes in temperature and pressure and composition in the case of plasmas. Such environments are difficult to study in detail with methods that make use of physical intrusion into the local environment. Such difficulties motivate the use of noncontact means of study such as optical approaches. By taking advantage of impressive advances in diode laser and associated technology, tunable diode laser absorption spectroscopy TDLAS has become a widespread tool for optical diagnostics in reacting flows. Measurements of target species concentration, temperature, pressure, and velocity have been demonstrated in a wide variety of environments by several research groups. Commercialization of niche measurement instruments based on TDLAS has been achieved. The current maturity of the technique enables its application to hypersonic flow paths -- scramjet engines in particular. In this report we summarize our progress in applying TDLAS to scramjet isolators and combustors.

Subject Categories:

  • Lasers and Masers
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE