Abstract
ABSTRACT An experiment is described for the direct measurement of laminar burning velocity within an opticallyaccessed cylindrical combustion chamber. The laminar burning velocity was determined directly as thedifference between the flame propagation speed and the unburned gas velocity immediately ahead of theflame front. Particle Image Velocimetry (Ply) has been applied to measure the unburned gas velocity field.The local flame speed and flame front position were determined from a pair of ionisation probes inconjunction with the simultaneous NV measurement. The laminar burning velocity of propane-air mixtures initially at atmospheric condition for different equivalence ratios ranging from 0.7 - 1 .4 are presented. Closeagreement with other measurements and predicted results was found. Keywords: Particle Image Velocimetry, flame, flame speed, laminar burning velocity, unburned gasvelocity 1 . INTRODUCTION Laminar burning velocity is one of the most important characteristics for analysing and predicting thecombustion process. Andrews and Bradley 1
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