Feature-Parameter-Criterion for Predicting Lean Blowout Limit of Gas Turbine Combustor and Bluff Body Burner

Table 1

Grid size independence validation of annular combustor.

Grid size/mm	𝑇out/K	Rate of change/%	𝜂	Rate of change/%	Grid amount
4	1373.23	—	0.97	—	2100314
3.7	1486.62	8.26%	0.985	1.55%	2447927
3.5	1374.54	7.54%	0.97	1.52%	2890137
3.3	1457.32	6.02%	0.982	1.24%	3143522
3.1	1399.51	3.97%	0.993	1.12%	3325334
2.9	1372.03	1.96%	0.985	0.81%	3605722
2.6	1360.02	0.88%	0.978	0.71%	3891140
2.3	1371.92	0.87%	0.984	0.61%	4020562
2.1	1380.54	0.63%	0.987	0.30%	4415871