Related Experiment Video
Updated: Aug 17, 2026

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
Published on: June 1, 2016
Flame temperature and location measurements of sooting premixed Bunsen flames by rainbow schlieren deflectometry
Alfonso F Ibarreta1, Chih-Jen Sung
1Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA. afi@po.cwru.edu
Abstract:
Rainbow schlieren deflectometry (RSD) provides a simple and nonintrusive way of determining the temperature field of axisymmetric flames. This technique is specially suited for the detection of large temperature gradients, such as those near the flame location. We explore the feasibility and accuracy of using RSD to obtain the flame location and thermal structure of premixed Bunsen flames for varying fuel types, equivalence ratios, and soot loadings. Uncertainty analysis is also carried out to provide various ways to reduce RSD experimental error. The RSD technique is demonstrated to give useful data even for moderately and heavily sooting flames.
Related Concept Videos
Flame Photometry: Overview
Flame Photometry: Lab
Atomic Spectroscopy: Effects of Temperature
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature from...
Gas Chromatography: Types of Detectors-II
Atomic Absorption Spectroscopy: Atomization Methods

