Abstract
The present paper proposes an improved colour-modelled CH* and C2* measurement using a digital colour camera. A complete measurement description has been given. As an important part of the method, the camera sensor spectral response has been obtained through the optical calibration process. With this spectral response, an improved model that pivots on the relationship between image colour and flame chemiluminescence has been established, and its accuracy has been evaluated by determining CH*/C2* ratios of the premixed propane (C3H8) flames at different equivalence ratios (Φ = 0.93 − 1.53). The two sets of results rendered by the improved and the conventional methods have been compared rigorously.
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