Second-order moment turbulence-chemistry models for simulating NOx formation in gas combustion

For simulating NOx formation in combustion presently used turbulence-chemis try models either cannot or are inconvenient to simulate finite reaction ra te, or need extremely large computation time and storage, difficult to be u sed in engineering complex flows. Hence, different second-order moment (SOM ) turbulence-chemistry models are proposed. The SOM models can well simulat e CH4-O-2 turbulent combustion and NOx formation, verified by experiments. The results indicate that the SOM models may be economic and reasonable for predicting NOx formation in combustion. (C) 2000 Elsevier Science Ltd. All rights reserved.