流体机械2025，Vol.53Issue(11)：58-67,10.DOI:10.3969/j.issn.1005-0329.2025.11.008
几何参数对枕型板热工水力性能的影响研究
Study on influence of geometric parameters on thermal-hydraulic performance of pillow-plate
摘要
Abstract
To investigate the influence of geometric parameters on the thermal-hydraulic performance of pillow-plate heat exchangers(PPHE),numerical simulation method was used to systematically analyze the flow and heat transfer characteristics under different structural parameters.The structural configurations in existing research are relatively limited;therefore,taking pillow plates with equidistant weld spot arrangement ST=2SL=62 mm,hi=6 mm,Dsp=10 mm as the reference condition,within the Reynolds number range Re=1 000～8 000,the effects of weld spot pattern and other geometric parameter variations on heat transfer performance were mainly investigated.The results show that as the transverse pitch ST increases,both Nusselt number(Nu)and friction factor decrease;increasing the longitudinal pitch 2SL causes the Nu to first increase then decrease,while the friction factor continuously rises;increasing the channel height hi leads to a decrease in Nu but an increase in friction factor,thus causing the overall performance to decrease with increasing hi;increasing the weld spot diameter Dsp enhances disturbance,resulting in improvements in Nu,friction factor,and overall performance.Under low Re conditions,the equidistant weld spot pattern(ST=2SL=62 mm)demonstrates better overall performance;while at high Re,the transverse weld spot pattern performs better than the equidistant and longitudinal patterns.In summary,reducing hi,increasing Dsp,adopting equidistant weld spot arrangement at low Re,and using transverse weld spot arrangement at high Re can help improve the overall performance of pillow-plate heat exchangers.The research results can provide theoretical basis for the structural design and performance optimization of PPHEs.关键词
枕型板换热器(PPHE)/热工水力性能/数值模拟Key words
pillow-plate heat exchanger(PPHE)/thermal-hydraulic performance/numerical simulation分类
能源科技引用本文复制引用
ZHANG Qiushuang,CHEN Yongdong,HAN Bingchuan,WU Xiaohong,YAN Yongchao,LIU Xiaogen,YU Gaige,ZHANG Yuchen..几何参数对枕型板热工水力性能的影响研究[J].流体机械,2025,53(11):58-67,10.基金项目
安徽省重点研究和开发计划基础领域项目(2023z04020020) （2023z04020020）
合肥通用机械研究院有限公司青年科技基金项目(2024011178) （2024011178）
