文献类型：期刊文献

英文题名：3D numerical study of particle flow behavior in the impinging zone of an Opposed Multi-Burner gasifier

作者：Li, Chao[1];Dai, Zhenghua[1];Li, Weifeng[1];Xu, Jianliang[1];Wang, Fuchen[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat, Shanghai 200237, Peoples R China

年份：2012

卷号：225

起止页码：118

外文期刊名：POWDER TECHNOLOGY

收录：;EI(收录号：20122115048868);WOS:【SCI-EXPANDED(收录号:WOS:000305380400015)】；

基金：This work is supported by the National High Technology Research and Development Program of China (no. 2008AA050301), the National Basic Research Program of China (no. 2010CB227000) and the Fundamental Research Funds for the Ministry of Education (no. WB1014037). Thanks are due to our colleagues Prof. Haifeng Liu and Dr. Zhigang Sun for providing experimental data in model validation. We also wish to acknowledge Prof. Jie Wang for his revision of this paper.

语种：英文

外文关键词：Coal gasifier; Impinging flow; Hard-sphere model; DSMC method; Particle flow behavior

摘要：A3D model of the impinging zone of a commercial scale Opposed Multi-Burner (OMB) gasifier is established in this article, in which the gas flow and particle motion are simulated by the Eulerian-Lagrangian approach, and the gas turbulence is calculated using the realizable k-epsilon model. The particle collision is determined by the Direct Simulation Monte Carlo (DSMC) method and the modified Nanbu method, with the presumption that the particle is hard sphere. The model is validated with reference to the experimental result obtained on a laboratory device equipped with two opposed jets. The model reveals the concentration and mean velocity profiles of particles in the impinging zone. It is quantitatively observed that particles move at an accelerated speed from the jet and then at a rapidly decelerated speed near to the central impinging zone; particles are concentrated in the central impinging zone due to collision. (C) 2012 Elsevier B.V. All rights reserved.