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王秋旺
西安交通大学学报,2004,38(9):881~886,-0001,():
-1年11月30日
在介绍螺旋折流板管壳式换热器的结构及原理的基础上,对壳程传热强化及阻力特性的研究现状进行了总结,分析了壳侧流体的流动和换热机理,表明螺旋折流板结构是改善壳侧流动换热性能的有效措施与弓型折流板换热器相比,螺旋折流板换热器的最大特点是单位压降下的壳侧换热系数高。结合具体实例介绍了其在石油化工、能源动力及核能应用等行业中的应用前景。关于螺旋折流板换热器,还有许多问题需要进一步研究,如流动换热的机理以及影响流动换热机理的几何因素、相变情形、介质物性等。
螺旋折流板, 管壳式换热器, 壳程强化
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王秋旺, 梁红侠, 彭波涛, 罗来勤, 丰镇平
工程热物理学报,2004,25(4):688~690,-0001,():
-1年11月30日
采用高效紧凑式换热器是近年来微型燃气轮机发展取得成功的关键技术之一。本文在燃机参数给定情况下,通过对三种换热表面进行热力计算和分析,结果表明,CC原表面在紧凑式换热器中具有较强的应用潜力。此外,还就温差对压损的影响及燃气旁通量对回热度的影响进行了研究。
微型燃气轮机, 换热器, 原表面, 回热循环
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【期刊论文】Simulation of rarefied gas flow and heat transfer in microchannels
王秋旺, WANG Xian, WANG Qiuwang, TAO Wenquan & ZHENG Ping
SCIENCE IN CHINA (Series E) June 2002 Vol. 45 No.3,-0001,():
-1年11月30日
Analysis and simulation of rarefied nitrogen gas flow and heat transfer were performed with the Knusden number ranging from O.05 to 1.O, using the direct simulation of Monte Carlo (DSMC) method, The influences of the Kn number and the aspect ratio on the gas temperature and wall heat flux in the microchannels were studied parametrically. The total and local heat fluxes of the microchannel walls varying with the channel inlet velocities were also investigated in detail. It was found that the Kn number and the aspect ratio greatly influence the heat transfer performance of microchan-nels, and both the channel inlet and outlet have higher heat fluxes while the heat flux in the middle part of channels is very low. It is also found that the inlet free stream flow velocity has small affect on the wall total heat flux while it changes the distribution of local heat flux.
microchannel,, Kn number., DSMC,, fluid flow and heat transfer.,
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王秋旺
,-0001,():
-1年11月30日
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