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This paper presents a flame-height correlation for laminar totransition-to-turbulent regime diffusion flames. Flame-height measurements areobtained by means of numerical and experimental studies in which three highdefinition cameras were employed to take frontal, lateral and 45{\deg} angledimages simultaneously. The images were analysed using an image-processingalgorithm to determine the flame-height through indirect measurement. To locatean overall chemical-flame-length, numerical simulations were conducted with theunsteady Reynolds-Averaged Navier-Stokes technique. The eddy-dissipation modelwas also implemented to calculate chemical reaction rate. The experiments showthat this proposed correlation has an adjustment variation of luminousflame-height for the laminar regime of 16.9%, which indicates that, without theuse of the intermittent buoyant flame-height correlation, it globally bestrepresents the flame-height in this regime. For the laminar andtransition-to-turbulence regime the adjustment variations are 5.54% compared tothe most accepted flame-height correlations, thus providing an acceptably goodfitting. The numerical results show that the proposed range for thechemical-flame-length is located between the luminous and flickering flame zonecompared to the experimental flame images. These results agree with thechemical length zone reported in the literature. Therefore, the correlation canbe used for laminar and transition-to-turbulent combustion regimes.

Luminous Flame Height Correlation Based on Fuel Mass Flow for a Laminar to Transition-to-Turbulent Regime Diffusion Flame