扭转流换热器结构参数对流场和温度场的影响

doi:10.11949/j.issn.0438-1157.20171612

化工学报 ›› 2018, Vol. 69 ›› Issue (8): 3390-3397.DOI: 10.11949/j.issn.0438-1157.20171612

扭转流换热器结构参数对流场和温度场的影响

古新¹, 罗元坤¹, 熊晓朝¹, 王珂¹, 陶智麟²

1 郑州大学化工与能源学院, 河南省过程传热与节能重点实验室, 河南郑州 450002;
2 中国烟草总公司郑州烟草研究院, 河南郑州 450002

收稿日期:2017-12-07 修回日期:2018-05-25 出版日期:2018-08-05 发布日期:2018-08-05
通讯作者: 陶智麟
基金资助:
国家自然科学基金项目（21776263）；河南省科技攻关项目（182102310022）；河南省高等学校重点科研项目（18A470001）。

Influence of twisty flow heat exchanger's structural parameters on flow field and temperature field

GU Xin¹, LUO Yuankun¹, XIONG Xiaochao¹, WANG Ke¹, TAO Zhilin²

1 Key Laboratory of Process Heat Transfer and Energy Saving of Henan Province, Zhengzhou University, Zhengzhou 450002, Henan, China;
2 Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450002, Henan, China

Received:2017-12-07 Revised:2018-05-25 Online:2018-08-05 Published:2018-08-05
Supported by:
supported by the National Natural Science Foundation of China (21776263), the Science and Technology Research Program of Henan Province(182102310022) and the Key Research Program of Higher Education of Henan Province(18A470001).

摘要/Abstract

摘要：

建立扭转流换热器和弓形折流板换热器两种周期性全截面模型，采用计算流体力学方法对两种换热器的传热系数、阻力、综合性能进行了数值研究。分析了扭转流换热器管束支撑物类梯形导流板结构参数对换热器传热和流阻性能的影响。结果表明：导流板倾角和相邻两组导流板间距对扭转流换热器传热性能的影响显著，导流板宽度的影响次之，每组导流板的数量的影响较小。扭转流换热器优化结构，压降较弓形折流板换热器降低42.5%~46.9%，综合性能提高7.2%~14.1%。研究结果为管壳式换热器结构优化和强化传热提供了新方案。

关键词: 扭转流换热器, 计算流体力学, 传热, 数值模拟, 类梯形导流板

Abstract:

Periodic whole cross-section computation models of twisty flow heat exchanger and segmental baffle heat exchanger are established respectively. The heat transfer coefficient, flow resistance and thermal performance are studied with CFD simulation. The influence of inclination angle of trapezoidal baffles, baffles width, baffles pitch and number of baffles on the heat transfer performance in the twisty flow heat exchanger was studied. The results showed that the inclination angle of trapezoidal baffles and baffles pitch have a significant effect on heat transfer performance, the effect of baffles width is secondary, and the number of baffles have no significant effect. When the thermal performance factor TEF of twisty flow heat exchanger reaches the best, compared to segmental baffle heat exchanger, the pressure drop decrease by 42.5% to 46.9%, the TEF is improved by 7.2% to 14.1%. The results of this paper provide a new scheme of the shell and tube heat exchanger for structure optimization and heat transfer enhancement.

Key words: twisty flow heat exchanger, CFD, heat transfer, numerical simulation, trapezoidal baffles

中图分类号:

TK124

古新, 罗元坤, 熊晓朝, 王珂, 陶智麟. 扭转流换热器结构参数对流场和温度场的影响[J]. 化工学报, 2018, 69(8): 3390-3397.

GU Xin, LUO Yuankun, XIONG Xiaochao, WANG Ke, TAO Zhilin. Influence of twisty flow heat exchanger's structural parameters on flow field and temperature field[J]. CIESC Journal, 2018, 69(8): 3390-3397.

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扭转流换热器结构参数对流场和温度场的影响

Influence of twisty flow heat exchanger's structural parameters on flow field and temperature field

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