Abstract

An excitation-detection laser-induced fluorescence (LIF) scheme is proposed for the measurement of the NO rotational temperature and density. It is based on the simultaneous excitation of three NO ro-vibronic transitions from only two - one low and one high - J-rotational levels, with the laser set at a suitable fixed wavelength. The procedure does not require the measurement of the excitation spectrum but only of a well-resolved small spectral region of the fluorescence spectrum. The temperature and the density measurements are based on a reference NO LIF spectrum obtained at a known pressure and temperature that is used as a standard. This method is easy and not time consuming. It has been applied to a gas-dynamic expansion.

Quantification of the evaporative cooling in an ethanol spray created by a gasoline direct-injection system measured by multiline NO-LIF gas-temperature imaging

Helmut Kronemayer, Kemal Omerbegovic, and Christof Schulz
Appl. Opt. 46(34) 8322-8327 (2007)

Quantitative temperature measurements in high-pressure flames with multiline NO-LIF thermometry

Tonghun Lee, Wolfgang G. Bessler, Helmut Kronemayer, Christof Schulz, and Jay B. Jeffries
Appl. Opt. 44(31) 6718-6728 (2005)

Two-photon excitation of nitric oxide fluorescence as a temperature indicator in unsteady gasdynamic processes

R. L. McKenzie and K. P. Gross
Appl. Opt. 20(12) 2153-2165 (1981)

Development of high-resolution N₂ coherent anti-Stokes Raman scattering for measuring pressure, temperature, and density in high-speed gas flows

Mark A. Woodmansee, Robert P. Lucht, and J. Craig Dutton
Appl. Opt. 39(33) 6243-6256 (2000)

Rotational Raman Interferometric Technique to Measure Gas Temperatures

R. L. Armstrong
Appl. Opt. 14(2) 383-387 (1975)