Temperature and Density Measurements in an Engine by Pulsed Raman Spectroscopy

800137

02/01/1980

Event
1980 Automotive Engineering Congress and Exposition
Authors Abstract
Content
Measurements of temperature and nitrogen density and the fluctuations of these quantities have been made in a combusting engine. The measurements were made by applying pulsed, spontaneous laser Raman spectroscopy. This nonintrusive technique demonstrates one cubic millimeter spatial resolution and essentially instantaneous temporal resolution (10−8 second). Densities were determined by measuring the Stokes vibrational scattering of nitrogen, and the temperatures were determined by measuring the ratio of anti-Stokes to Stokes scattering. The diagnostic technique is described and its accuracy analyzed.
Temperatures and densities at two locations, over crank angles covering the compression and expansion strokes, for four equivalence ratios are presented. Typical temperature probability distributions are also presented.
Meta TagsDetails
DOI
https://doi.org/10.4271/800137
Pages
12
Citation
Smith, J., "Temperature and Density Measurements in an Engine by Pulsed Raman Spectroscopy," SAE Technical Paper 800137, 1980, https://doi.org/10.4271/800137.
Additional Details
Publisher
Published
Feb 1, 1980
Product Code
800137
Content Type
Technical Paper
Language
English