太阳能烟囱内非稳态自然对流温度边界层分析

山东大学学报(工学版) ›› 2009, Vol. 39 ›› Issue (6): 150-153.

太阳能烟囱内非稳态自然对流温度边界层分析

何云,苏新武,孙祝,徐永丽

山西大同大学物理与电子科学学院，山西大同 037009

收稿日期:2008-12-10 出版日期:2009-12-16 发布日期:2009-12-16
作者简介:何云(1977-),男,山西朔州人,讲师,硕士,研究方向为太阳能光热利用、计算流体力学. E-mail:heyun-418@yahoo.com.cn
基金资助:
山西大同大学校级科研资助项目(2009Q1)

Analysis of the temperature boundarylayer of unsteady natural convection in a solar chimney

Physics and Electronic Science School, Shanxi Datong University, Datong 037009, China

Received:2008-12-10 Online:2009-12-16 Published:2009-12-16

摘要/Abstract

摘要：

太阳能烟囱内空气流动主要以自然对流边界层流动为主,由于受系统运行控制参数和结构参数的限制,边界层的发展不能象大空间那样自由展开;通过直接数值模拟讨论温度边界层发展的影响因素,结果表明当边界层能够自由展开并且到达稳态时,温度边界层厚度与(y/Ra)^1/5满足定量关系;当边界层不能自由展开时,边界层厚度与w,Ra的大小有关.

关键词: 太阳能烟囱;自然对流;直接数值模拟;温度边界层

Abstract:

The flow in a solar chimney was dominated by natural convectionboundarylayer flow. Because of the restrictions of the operational parameters and thestructural parameters, the development of the boundary layer is different from freespace. The effects of temperature boundary layer thickness were discussed by direct numerical simulation. The results showed that the boundary layer thikness could meet with certain quantitative relations with  (y/Ra)^1/5 when the boundary layer can freely develop and reach the steadystate stage, and the boundary layer thickness were relative to　w, Ra　when the boundary layer could not be freely carried out.

Key words: solar chimney; natural convection; direct numerical simulation; temperature boundarylayer

何云苏新武孙祝徐永丽. 太阳能烟囱内非稳态自然对流温度边界层分析[J]. 山东大学学报(工学版), 2009, 39(6): 150-153.

HE Yun, SU Xin-Wu, SUN Chu, XU Yong-Li. Analysis of the temperature boundarylayer of unsteady natural convection in a solar chimney[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2009, 39(6): 150-153.

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