文献类型：期刊文献

英文题名：Investigation of NOx emission under different burner structures with the optimized combustion model

作者：Yao, Qian[1];Zhang, Yu[2];Wang, Xinjie[1];Tian, Zhou[1];Hu, Guihua[1];Du, Wenli[1]

机构：[1]East China Univ Sci & Technol, Key Lab Smart Mfg Energy Chem Proc, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Engn Res Ctr Space Engine, Shanghai Inst Space Prop, Shanghai 201112, Peoples R China

年份：2022

卷号：482

起止页码：224

外文期刊名：NEUROCOMPUTING

收录：;EI(收录号：20214911294264);WOS:【SCI-EXPANDED(收录号:WOS:000819853500009)】；

基金：This work is supported by the National Natural Science Foundation of China (Basic Science Center Program: 61988101) , National Natural Science Fund for Distinguished Young Scholars (61725301) , International (Regional) Cooperation and Exchange Project (61720106008) , the National Natural Science Foundation of China (21908058) and the Shanghai Sailing Program (19YF1412200).

语种：英文

外文关键词：Computational fluid dynamics; Burner structure; Surrogate assisted evolutionary algorithm; Turbulent combustion; NOx

摘要：As restrictions on NOx (nitrogen oxides) emission become increasingly stringent, many efforts have been put into the development of NOx control strategies. The burner structures of the heating furnace can affect NOx formation by the means of changing the flame temperature. To simulate the turbulent combustion process, the Steady Diffusion Flamelet (SDF) model is used and coupled with detailed mechanisms. It is found that some key flamelet parameters of the SDF model will greatly affect the accuracy of the simulation results. In this study, an efficient optimization procedure is proposed to optimize the combustion model parameters with the surrogate assisted evolutionary algorithm K-RVEA. The surrogate model is used to reduce the computational time of the optimization procedure. Using the optimized model parameters, the temperature field and the concentration fields obtained by the simulations are in good agreement with the measurements. Based on this, the investigation of the impact of the length of pilot wall and jet wall on NOx emission is carried out. The results show that the outlet NOx concentration reaches a local minimal value when the length of pilot wall and jet wall are equal. The length of monotonic increasing interval, where the outlet NOx concentration increases when increasing the length of the pilot wall, is 30 mm. If the length of pilot wall is relatively 30 mm longer than that of the jet wall, the outlet NOx concentration will be further reduced. The proposed optimization procedure and obtained results will benefit the improvement of the burner structure of the heating furnace. (C) 2021 Elsevier B.V. All rights reserved.