Numerical investigation on flow and heat transfer performance of gravity-driven granular flowing across inverted drop-shaped tube

Zhoutuo TAN; Zhigang GUO; Jian YANG; Qiuwang WANG

doi:10.11949/0438-1157.20190557

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Numerical investigation on flow and heat transfer performance of gravity-driven granular flowing across inverted drop-shaped tube

Fluid dynamics and transport phenomena | 更新时间：2020-06-24

- Numerical investigation on flow and heat transfer performance of gravity-driven granular flowing across inverted drop-shaped tube
- CIESC Journal Vol. 70, Issue S2, Pages: 94-100(2019)
- 作者机构：
  
  西安交通大学热流科学与工程教育部重点实验室，陕西西安 710049
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190557
  CLC： TQ 025.2
- Received：23 May 2019，
  
  Revised：2019-05-30，
  
  Published：05 September 2019
- 稿件说明：
移动端阅览
谈周妥, 郭志罡, 杨剑, 王秋旺. 重力驱动颗粒流横掠倒置滴形管管外流动传热特性的数值研究[J]. 化工学报, 2019, 70(S2): 94-100

TAN Zhoutuo, GUO Zhigang, YANG Jian, WANG Qiuwang. Numerical investigation on flow and heat transfer performance of gravity-driven granular flowing across inverted drop-shaped tube[J]. CIESC Journal, 2019, 70(S2): 94-100
谈周妥, 郭志罡, 杨剑, 王秋旺. 重力驱动颗粒流横掠倒置滴形管管外流动传热特性的数值研究[J]. 化工学报, 2019, 70(S2): 94-100 DOI： 10.11949/0438-1157.20190557.

TAN Zhoutuo, GUO Zhigang, YANG Jian, WANG Qiuwang. Numerical investigation on flow and heat transfer performance of gravity-driven granular flowing across inverted drop-shaped tube[J]. CIESC Journal, 2019, 70(S2): 94-100 DOI： 10.11949/0438-1157.20190557.

摘要

采用离散单元方法（DEM）模拟了重力驱动的颗粒流横掠圆管和不同椭圆度（

=1.0

1.5

2.0

2.5）的滴形管下的流动与换热情况，分析了滴形管的椭圆度对停滞区大小、管周受力以及有效传热系数的影响，并与圆管进行了对比。主要结论如下：滴形管的停滞区和空区均小于圆管，随着椭圆度增大，管顶部颗粒流速增加，流动性变好；滴形管受颗粒流的法向力和切向力均小于圆管，在椭圆度大于1.0后，增加椭圆度，两力不再减小；滴形管的有效传热系数小于圆管，且随着椭圆度增大，有效传热系数降低。

Abstract

Gravity-driven granular flowing across inverted drop-shaped tubes is investigated

with the aim to enhance flow and heat transfer performance and avoid particle stagnant. The discrete element method was used to simulate the flow and heat transfer of a gravity-driven particle flow across a circular tube and a drop-shaped tube with different ellipticities (

= 1.0

1.5

2.0

2.5) was analyzed.t The effect of ellipticity on the size of the stagnation zone

the normal and tangential force on the pipe

and the effective heat transfer coefficient was compared with the circular tube. The main conclusions are as follows: compared with circular tube

granular flow drop-shaped tubes perform better in flow and stagnation avoidance. The stagnation area and the void area of the drop-shaped tube are smaller than the circular tube. As the ellipticity increases

the particle flow velocity at the top of the tube increases

and the flow upward the tube becomes better. The drop-shaped tube is subjected to the normal force and the tangential force of the granular flow and both are smaller than the circular tube. After the ellipticity is more than 1.0

the ellipticity is increased

and the two forces are no longer reduced. The effective heat transfer coefficient of the drop-shaped tube is smaller than that of the circular tube

and the effective heat transfer coefficient decreases as the ellipticity increases.

关键词

Keywords

references

Zhang H , Wang H , Zhu X , et al . A review of waste heat recovery technologies towards molten slag in steel industry [J]. Applied Energy , 2013 , 112 ( 4 ): 956 - 966 .

郑斌 , 刘永启 , 李瑞阳 , 等 . 高温煅烧石油焦排料过程余热回收 [J]. 化工进展 , 2015 , 34 ( 6 ): 1539 - 1543 .

Zheng B , Liu Y Q , Li R Y , et al . Experimental investigation on waste heat reutilization of calcined petroleum coke [J]. Chemical Industry and Engineering Progress , 2015 , 34 ( 6 ): 1539 - 1543 .

Liu J , Yu Q , Peng J , et al . Thermal energy recovery from high-temperature blast furnace slag particles [J]. International Communications in Heat & Mass Transfer , 2015 , 69 : 23 - 28 .

Baumann T , Zunft S . Development and performance assessment of a moving bed heat exchanger for solar central receiver power plants [C]// Solarpaces International Symposium on Concentrated Solar Power and Chemical Energy Technologies . 2014 : 748 - 757 .

Al-Ansary H , El-Leathy A , Al-Suhaibani Z , et al . Experimental study of a sand–air heat exchanger for use with a high-temperature solar gas turbine system [J]. Journal of Solar Energy Engineering , 2012 , 134 ( 4 ): 041017 .

Chen J , Akiyama T , Nogami H , et al . Modeling of solid flow in moving beds [J]. Transactions of the Iron & Steel Institute of Japan , 1993 , 33 ( 6 ): 664 - 671 .

Almendros-Ibáñez J A , Soria-Verdugo A , Ruiz-Rivas U , et al . Solid conduction effects and design criteria in moving bed heat exchangers [J]. Applied Thermal Engineering , 2011 , 31 ( 6 ): 1200 - 1207 .

Bartsch P , Baumann T , Zunft S . Granular flow field in moving bed heat exchangers: a continuous model approach [J]. Energy Procedia , 2016 , 99 : 72 - 79 .

陈中 , 李庆领 . 横掠滴形管的局部及平均换热 [J]. 武汉工程大学学报 , 1997 , 19 ( 3 ): 1 - 4 .

Chen Z , Li Q L . Local and average heat transfer of cross drop-shaped tube [J]. Journal of Wuhan Institute of Chemical Technology , 1997 , 19 ( 3 ): 1 - 4 .

刘安源 , 刘石 . 流化床内颗粒碰撞传热的理论研究 [J]. 中国电机工程学报 , 2003 , 23 ( 3 ): 161 - 165 .

Liu A Y , Liu S . Theoretical study on impact heat transfer between particles in fluidized bed [J]. Proceedings of the CSEE , 2003 , 23 ( 3 ): 161 - 165 .

武锦涛 , 陈纪忠 , 阳永荣 . 移动床中颗粒接触传热的数学模型 [J]. 化工学报 , 2006 , 57 ( 4 ): 719 - 725 .

Wu J T , Chen J Z , Yang Y R . Model of contact heat transfer in granular moving bed [J]. Journal of Chemical Industry and Engineering (China) , 2006 , 57 ( 4 ): 719 - 725 .

卜昌盛 , 陈晓平 , 刘道银 , 等 . 基于颗粒尺度的离散颗粒传热模型 [J]. 化工学报 , 2012 , 63 ( 3 ): 698 - 704 .

Bu C S , Chen X P , Liu D Y , et al . Heat transfer model for particles with discrete element method [J]. CIESC Journal , 2012 , 63 ( 3 ): 698 - 704 .

Vargas W L , Mccarthy J J . Heat conduction in granular materials [J]. MRS Proceedings , 2000 , 627 ( 5 ): 1052 - 1059 .

Collier A P , Hayhurst A N , Richardson J L , et al . The heat transfer coefficient between a particle and a bed (packed or fluidised) of much larger particles [J]. Chemical Engineering Science , 2004 , 59 ( 21 ): 4613 - 4620 .

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