Oscillatory heat transfer characteristics of supercritical water in parallel channels

LIANG Ziyu; WAN Li; LI Juan; ZHOU Xihong; YANG Dong

doi:10.11949/j.issn.0438-1157.20181491

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Oscillatory heat transfer characteristics of supercritical water in parallel channels

Fluid dynamics and transport phenomena | 更新时间：2026-07-24

- Oscillatory heat transfer characteristics of supercritical water in parallel channels
- CIESC Journal Vol. 70, Issue 7, Pages: 2488-2495(2019)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室，陕西西安 710049
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181491
  CLC： TK 124
- Received：19 December 2018，
  
  Revised：2019-04-08，
  
  Online First：24 July 2026，
  
  Published：05 July 2019
- 稿件说明：
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梁梓宇, 万李, 李娟, 周熙宏, 杨冬. 并联双通道内超临界水的脉动传热特性[J]. 化工学报, 2019, 70(7): 2488-2495

LIANG Ziyu, WAN Li, LI Juan, ZHOU Xihong, YANG Dong. Oscillatory heat transfer characteristics of supercritical water in parallel channels[J]. CIESC Journal, 2019, 70(7): 2488-2495
梁梓宇, 万李, 李娟, 周熙宏, 杨冬. 并联双通道内超临界水的脉动传热特性[J]. 化工学报, 2019, 70(7): 2488-2495 DOI： 10.11949/j.issn.0438-1157.20181491.

LIANG Ziyu, WAN Li, LI Juan, ZHOU Xihong, YANG Dong. Oscillatory heat transfer characteristics of supercritical water in parallel channels[J]. CIESC Journal, 2019, 70(7): 2488-2495 DOI： 10.11949/j.issn.0438-1157.20181491.

摘要

在压力26~30 MPa，时均质量流速420 kg·m

-2

·s

-1

、热通量0~130 kW·m

-2

工况范围内，对垂直上升并联双通道内超临界水的脉动传热特性进行了实验研究。根据实验数据分析了流量脉动对壁温的影响，脉动振幅率(

)和脉动频率数（

）对时均Nusselt数的影响，并将脉动时均

与超临界传热关联式进行了比较。结果表明：壁温随流量脉动而波动，脉动周期相同，相位相反，流量脉动振幅越大，壁温波动也越大；低频脉动时均

随脉动振幅率的增大逐渐减小，随脉动频率数的增大先减小后基本不变；高频脉动时均

随脉动振幅率的增大而缓慢增大，随脉动频率数的增大而减小；关联式预测的

较实验值普遍偏高。

Abstract

The oscillatory heat transfer characteristics of supercritical water in vertical upward parallel channels were experimentally investigated under the condition of pressure from 26—30 MPa

time-averaged mass flow rate of 420 kg·m

-2

·s

-1

and heat flux from 0—130 kW·m

-2

. According to the experimental results

the effects of mass flow rate oscillation on wall temperature

oscillatory amplitude ratio (

) and oscillatory frequency number (

) on time-averaged Nusselt number were analyzed

and the time-averaged

of oscillatory flow was compared with the supercritical heat transfer correlation equations. The results show that the wall temperature fluctuates with mass flow rate oscillation at the same oscillatory period and opposite phase

and the larger amplitude of ma

ss flow rate oscillation leads to the stronger fluctuation of wall temperature. At the occurrence of low frequency oscillation

the time-averaged

decreases with the increase of oscillatory amplitude ratio

and decreases firstly with the increase of oscillatory frequency number and then remains constant. At the occurrence of high frequency oscillation

the time-averaged

increases slowly with the increase of oscillatory amplitude ratio

and decreases with the increase of oscillatory frequency number. The values of

predicted by correlations is generally higher than that of experiments.

关键词

Keywords

references

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