Experimental and Modeling Study of Boiling Heat Transfer Characteristics in Additively Manufactured Flow Channels for Steam Generators

YAO Lei; YANG Ke; HE Gening; FU Guozhong; CHENG Yue; HU Yu; TANG Chenhang; WANG Yuyang; FENG Yuan; LEI Youjie

doi:10.7512/j.issn.1001-2303.2026.07.16

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Experimental and Modeling Study of Boiling Heat Transfer Characteristics in Additively Manufactured Flow Channels for Steam Generators
Vol. 56, Issue 7, Pages: 119-126(2026)
Received：20 June 2026，

Revised：2026-07-01，

Published：20 July 2026
DOI： 10.7512/j.issn.1001-2303.2026.07.16
稿件说明：

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姚磊，杨柯，何戈宁，等.基于增材制造的蒸汽发生器沸腾传热特征流道热工水力试验与模型研究［J］.电焊机，2026，56（7）：119-126. DOI： 10.7512/j.issn.1001-2303.2026.07.16.

YAO Lei，YANG Ke，HE Gening，et al.Experimental and Modeling Study of Boiling Heat Transfer Characteristics in Additively Manufactured Flow Channels for Steam Generators［J］.Electric Welding Machine，2026，56（7）：119-126. DOI： 10.7512/j.issn.1001-2303.2026.07.16.

摘要

为研究增材制造蒸汽发生器特征流道的热工水力性能，本文开展了单管传热与阻力试验，并建立了分段预测模型。试验设计了六种不同内构件及外管几何结构的流道样件，在开式回路上系统考察了质量流速、热流密度对单相及两相换热特性的影响。基于试验数据，采用“经典机理框架+半经验修正”的分段策略，分别建立了液相段、两相段和气相段的传热与阻力关联模型，并进一步整合得到带肋片管道的通用关联式。结果表明：单相液体段，Dittus-Boelter关联式预测精度良好；饱和沸腾段，Chen关联式具有工程可用性；过热蒸汽段，DB关联式存在系统性低估。传热模型显示带肋片结构具有更明显的强化换热能力；阻力模型表明点阵管道阻力最大，带肋片次之，无填充最小。本研究为蒸汽发生器设计优化提供了试验数据支撑与工程预测工具。

Abstract

To investigate the thermal-hydraulic performance of characteristic flow channels in additively manufactured steam generators

single-tube heat transfer and flow resistance experiments are carried out

and a segmented prediction model is established in this paper. Six channel specimens with different internal components and outer tube geometric structures are designed for the tests. On an open-loop test facility

the effects of mass velocity and heat flux on single-phase and two-phase heat transfer characteristics are systematically investigated.Based on the experimental data

a segmented strategy of "classical mechanism framework + semi-empirical correction" is adopted to develop heat transfer and pressure drop correlation models for liquid region

two-phase region and superheated vapor region respectively. These sub-models are further integrated to form a general correlation for finned tubes.The results indicate that the Dittus-Boelter correlation presents satisfactory prediction accuracy for single-phase liquid flow; the Chen correlation is applicable for engineering calculations in saturated boiling regions; the Dittus-Boelter correlation systematically underestimates heat transfer coefficients in superheated steam regions. The heat transfer model demonstrates that finned structures deliver prominent heat transfer enhancement. According to the resistance model

lattice-structured tubes produce the largest flow resistance

followed by finned tubes

while plain tubes without inserts yield the minimum resistance. This study provides experimental data support and an engineering prediction tool for the design optimization of steam generators.

关键词

Keywords

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