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

Table 2

Grid size independence validation of bluff body burner.

Grid size/mm	𝑇out/K	Rate of change/%	𝑉40	Rate of change/%	Grid amount
3.0	851.07	—	23.28	—	782198
2.5	865.31	1.67%	24.97	7.26%	1365165
2.2	842.63	2.62%	25.49	2.08%	1965144
2.0	835.51	0.84%	25.23	1.02%	2496055
1.7	830.24	0.63%	25.46	0.91%	3325334
1.4	834.97	0.57%	25.31	0.59%	4047064
1.1	831.26	0.44%	25.17	0.55%	5693193