Validation of the RANS-SOM Combustion Model Using Direct Numerical Simulation of Incompressible Turbulent Reacting Flows

›› 2008, Vol. 16 ›› Issue (5): 679-685.

• TRANSPORT PHENOMENA & FLUID MECHANICS • Previous Articles Next Articles

Validation of the RANS-SOM Combustion Model Using Direct Numerical Simulation of Incompressible Turbulent Reacting Flows

WANG Fang¹, XU Chunxiao², ZHOU Lixing²

1. Department of Thermal Engineering, Beihang University, Beijing 100083, China;
2. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

Received:2007-10-22 Revised:2008-06-23 Online:2008-10-28 Published:2008-10-28
Supported by:
the National Natural Science Foundation of China(50606026,50736006).

Validation of the RANS-SOM Combustion Model Using Direct Numerical Simulation of Incompressible Turbulent Reacting Flows

王方¹, 许春晓², 周力行²

1. Department of Thermal Engineering, Beihang University, Beijing 100083, China;
2. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

通讯作者: ZHOU Lixing,E-mail:zhoulx@mail.tsinghua.edu.cn
基金资助:
the National Natural Science Foundation of China(50606026,50736006).

Abstract

Abstract: The second-order moment combustion model,proposed by the authors is validated using the direct numerical simulation(DNS)of incompressible turbulent reacting channel flows.The instantaneous DNS results show the near-wall strip structures of concentration and temperature fluctuations.The DNS statistical results give the budget of the terms in the correlation equations,showing that the production and dissipation terms are most important.The DNS statistical data are used to validate the closure model in RANS second-order moment(SOM) combustion model.It is found that the simulated 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.

Key words: second-order moment combustion model, direct numerical simulation, incompressible reacting flows

摘要： The second-order moment combustion model,proposed by the authors is validated using the direct numerical simulation(DNS)of incompressible turbulent reacting channel flows.The instantaneous DNS results show the near-wall strip structures of concentration and temperature fluctuations.The DNS statistical results give the budget of the terms in the correlation equations,showing that the production and dissipation terms are most important.The DNS statistical data are used to validate the closure model in RANS second-order moment(SOM) combustion model.It is found that the simulated 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.

关键词: second-order moment combustion model, direct numerical simulation, incompressible reacting flows

WANG Fang, XU Chunxiao, ZHOU Lixing. Validation of the RANS-SOM Combustion Model Using Direct Numerical Simulation of Incompressible Turbulent Reacting Flows[J]. , 2008, 16(5): 679-685.

王方, 许春晓, 周力行. Validation of the RANS-SOM Combustion Model Using Direct Numerical Simulation of Incompressible Turbulent Reacting Flows[J]. , 2008, 16(5): 679-685.

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Validation of the RANS-SOM Combustion Model Using Direct Numerical Simulation of Incompressible Turbulent Reacting Flows

Validation of the RANS-SOM Combustion Model Using Direct Numerical Simulation of Incompressible Turbulent Reacting Flows

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