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	Analysis of the gasification performance of a staged entrained flow gasifier by presumed PDF model
	Wu Yu-xin ; Zhang Jian-sheng ; Yue Guang-xi ; Lu Jun-fu
	2010-10-12 ; 2010-10-12
关键词	Practical Theoretical or Mathematical/ coal gasification stochastic processes/ gasification performance staged entrained flow gasifier presumed PDF model turbulence equations dispersed phase model stochastic tracking method coal particle gasification process/ A8630Q Chemical energy conversion A0250 Probability theory, stochastic processes, and statistics B8210 Energy resources B0240Z Other topics in statistics
中文摘要	In order to study the character of the flow field and the gasification performance of staged gasification technology, numerical simulation for a staged entrained flow coal gasifier located in Shanxi province was conducted based on Fluent. Body fitted hexahedron mesh was used to minimize the numerical diffusion due to mesh quality. Realizable k- epsiv model was adopted to make a closure for turbulence equations, dispersed phase model (DPM) and stochastic tracking method (STM) were used to describe the coal particle gasification process and to predict the turbulent disturbance effects on particle motion. A combustion table was built by presumed PDF model to describe the relationship between mixture fraction and the scalars of temperature, species, et al. In addition, User Defined Functions was used to modify the heterogeneous char gasification reaction model in Fluent. The analysis of the flow field and the contours of temperature of the staged entrained flow coal gasifier show that the engulfment and the counter flow aroused by the secondary injection strengthen the mixing process in the staged gasifier. This had a positive effect on the improvement of coal conversion rate.
语种	中文
出版者	Chinese Society for Electrical Engineering ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79894]
专题	清华大学
推荐引用方式 GB/T 7714	Wu Yu-xin,Zhang Jian-sheng,Yue Guang-xi,et al. Analysis of the gasification performance of a staged entrained flow gasifier by presumed PDF model[J],2010, 2010.
APA	Wu Yu-xin,Zhang Jian-sheng,Yue Guang-xi,&Lu Jun-fu.(2010).Analysis of the gasification performance of a staged entrained flow gasifier by presumed PDF model..
MLA	Wu Yu-xin,et al."Analysis of the gasification performance of a staged entrained flow gasifier by presumed PDF model".(2010).

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