Lean Blowout Detection Techniques for Partially Premixed Flames in a Dump Combustor - Novel Combustion Concepts for Sustainable Energy Development - page 213

Fig. 12 Variation of γ with Φ / Φ LBO for different air flow rates: a Q air = 70 LPM, b 80 LPM, and
c 85 LPM (Chaudhari et al. 2013 )

this technique is that the characterization of the fl flame dynamics itself in terms of

this metric does not involve any a priori de nition of threshold.

For calculating , very few computations are required so the real-time require-

γ

ment is satis ed. Time can be reduced by processing a single image instead of

taking average of four images. This has also been tested and found satisfactory. The
LBO warning will be initiated on the set threshold ( c thresh ), and the active control
system will take appropriate action for enhancing the stabilization of

flame in
combustor so that the incipient blowout could be avoided and LBO limit can be
extended.
From the above results, it is observed that the proposed

fl

fl flame color-based LBO

detection technique works consistently over the various degrees of air/fuel