THEORETICAL VALIDATION OF THE SOM COMBUSTION MODEL USING DNS OF TURBULENT REACTING FLOWS
The direct numerical simulation of incompressible turbulent reacting channel flows was carried out using a spectral method. The instantaneous results show the turbulence structure and the near-wall strip structures of concentration and temperature fluctuations. The DNS statistical results give the budget of the terms in the scalar correlation equations, showing that the production and dissipation terms are most important. The DNS statistical data are used to validate the closure models in the second-order moment (SOM) combustion models in RANS modeling. It is found that the simulated values of diffusion and production terms are in agreement with the DNS data in most flow regions, except in the near-wall region, where the near-wall modification should be made, and the closure model for the dissipation term needs further improvement. The algebraic second-order moment (ASOM) combustion model is well validated by DNS.
direct numerical simulation incompressible reacting flows second-order moment combustion model
Fang WANG Chunxiao XU Lixing ZHOU
Department of Thermal Engineering, Beihang University, Beijing, China Department of Engineering Mechanics, Tsinghua University, Beijing, China
国际会议
第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)
武汉
英文
258-261
2007-12-01（万方平台首次上网日期，不代表论文的发表时间）