Effect of temporal increase in equivalence ratio on combustion instability of a lean-premixed swirling hydrogen flame
M. Kawai,
J. Nagao,
A. L. Pillai
et al.
Abstract:The effect of temporal increase in the equivalence ratio on the combustion instability of a lean-premixed low-swirl hydrogen jet flame in a low-swirl combustor (LSC) is investigated in detail using a high-fidelity Large-Eddy Simulation (LES). The equivalence ratio is linearly increased from 0.3 to 0.5 over a duration of 0.4 s. The results show that the pressure oscillation amplitude in the combustor increases significantly when the equivalence ratio at the combustor inlet (ERCI) exceeds 0.42, and the maximum p… Show more
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