Implementation variations of adiabatic steady PPDF flamelet model in turbulent H₂/air non-premixed combustion simulation

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• 作者：Qiong Li^a ; Peiyu Zhang^b ; Ying Feng^c ; Peiyong Wang^c ; ^{peiyong.wang@xmu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：PPDF flamelet model ; Turbulent diffusion flames ; Scalar dissipation rate ; Lewis number effect ; Opposed jet flame
• 刊名：Case Studies in Thermal Engineering
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：6
• 期：Complete
• 页码：204-211
• 全文大小：1122 K

文摘

Implementation of the adiabatic steady PPDF flamelet model involves a lot of variations including different scalar dissipation rate calculation methods and different mass diffusion models of the opposed jet flame. Four different look-up tables have been generated with the combinations of two different scalar dissipation rate calculation methods and two different mass diffusion models of the opposed jet flame. Simulation of a turbulent non-premixed H₂ jet flame is used to discriminate the accuracy of different implementation methods by comparison with experimental data. It is observed that the turbulent flamelets are very close to their equilibrium states and the simulation result is not sensitive to the choice of dissipation rate calculation method. However, the choice of mass diffusion model has significant influence on the simulation result and excluding the Lewis number effect should be enforced for the opposed jet flame simulation.