Rayleigh-Bénard thermal convection heat transfer characteristics with internal spherical arrays

LIU Zhuang; ZHOU Quan

doi:10.7638/kqdlxxb-2021.0416

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Rayleigh-Bénard thermal convection heat transfer characteristics with internal spherical arrays

更新时间：2026-05-28

- Rayleigh-Bénard thermal convection heat transfer characteristics with internal spherical arrays
- Vol. 40, Issue 2, Pages: 223-228(2022)
- 作者机构：
  
  上海大学上海市应用数学和力学研究所,上海,200072
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2021.0416
  CLC： O357.5
- Published：2022
- 稿件说明：
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刘壮, 周全. 内置圆球阵列的Rayleigh-Bénard热对流传热特性[J]. 空气动力学学报, 2022, 40(2): 223−228.

LIU Zhuang, ZHOU Quan. Rayleigh-Bénard thermal convection heat transfer characteristics with internal spherical arrays[J]. 2022, 40(2): 223-228.
刘壮, 周全. 内置圆球阵列的Rayleigh-Bénard热对流传热特性[J]. 空气动力学学报, 2022, 40(2): 223−228. DOI： 10.7638/kqdlxxb-2021.0416

LIU Zhuang, ZHOU Quan. Rayleigh-Bénard thermal convection heat transfer characteristics with internal spherical arrays[J]. 2022, 40(2): 223-228. DOI： 10.7638/kqdlxxb-2021.0416.

摘要

通过实验研究了内置圆球对Rayleigh-Bénard（RB）湍流热对流系统传热特性的影响。在对流槽内部加入有机玻璃圆球，通过改变圆球的直径和分布方式研究不同孔隙度

$\phi$

img text_id='M111' class='formula-img' style='display:none;' src='2021-416_M111.jpg'>

对RB系统传热的影响。Rayleigh数（

）从5×10

变化到2×10

，Prandtl数（

）固定为5.5。结果表明，当

较小时，填充圆球对RB系统的传热几乎没有影响；当

较大时，RB系统的传热得到增强，最大增幅达16%。

Abstract

In this paper

the effect of internal sphere on heat transfer characteristics of Rayleigh-Bénard (RB) thermal convection system is investigated experimentally. The effect of

$\phi$

img text_id='M112' class='formula-img' style='display:none;' src='2021-416_M112.jpg'>

porosity on heat transfer of RB system was studied by changing the diameter and distribution of the plexiglass sphere. Rayleigh number (

) changed from 5×10

to 2×10

and Prandtl number (

) was fixed at 5.5. The results show that under low

numbers

the filled spheres have almost no effect on the heat transfer of the RB system; under high

numbers

the heat transfer of the RB system is enhanced

with a maximum increase of 16%.

关键词

Keywords

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