Article(id=1319294750004466156, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1319294714340291556, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1005-0329.2025.11.013, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1749830400000, receivedDateStr=2025-06-14, revisedDate=1760025600000, revisedDateStr=2025-10-10, acceptedDate=null, acceptedDateStr=null, onlineDate=1792473979712, onlineDateStr=2026-10-20, pubDate=1764432000000, pubDateStr=2025-11-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792473979712, onlineIssueDateStr=2026-10-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792473979712, creator=13701087609, updateTime=1792473979712, updator=13701087609, issue=Issue{id=1319294714340291556, tenantId=1146029695717560320, journalId=1316781260334530699, year='2025', volume='53', issue='11', pageStart='1', pageEnd='106', issueExtLink='null', onlineDate='null', pubDate='1764432000000', pubDateStr='2025-11-30', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792473971208, creator='13701087609', updateTime=1792473971208, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=99, endPage=106, ext={EN=ArticleExt(id=1319294750193209837, articleId=1319294750004466156, tenantId=1146029695717560320, journalId=1316781260334530699, language=EN, title=Study on flow and heat transfer characteristics of airfoil channel oil cooler, columnId=null, journalTitle=Fluid Machinery, columnName=null, runingTitle=null, highlight=null, articleAbstract=

To improve the design accuracy of microchannel oil coolers,numerical calculations and experimental studies on flow and heat transfer of oil in airfoil‑channel printed circuit heat exchangers (PCHE) were conducted,focusing on the impact of oil inlet temperature and flow velocity on the flow resistance and heat transfer performance of the heat exchanger.Empirical correlations for Nu and f of oil in airfoil channels were fitted.The results show that the maximum error between numerical calculations and experimental results is within 20%,indicating the reliability of the numerical model.Flow velocity is a key factor affecting the thermal‑side Nuh,while temperature has a weaker influence.Within the studied operating range,increasing the flow velocity from 0.2 m/s to 1 m/s raises Nuh by approximately 78%,whereas a temperature increase of 10 K only changes Nuh by 0.1~0.2.Both temperature and flow velocity significantly affect pressure drop.Thermal‑side pressure drop is positively correlated with oil inlet flow velocity,increasing by 270%~300% as flow velocity rises from 0.2 m/s to 1 m/s.When the thermal‑side inlet flow velocity is constant,pressure drop decreases with rising oil temperature.A temperature increase of 10 K reduces pressure drop by 8 460~48 800 Pa.The maximum errors of the fitted empirical correlations for Nu and f are 6.23% and 11.68%,respectively.The research results provide a theoretical basis for the accurate design of microchannel oil coolers.

, authors=Ruifang SHI1, Wen FU1, Zhe XU1, Peiyue LI1, Dong ZENG1, Minghui ZHANG1, Yanxin ZHAO2, Junhao CHU1, authorsList=Ruifang SHI, Wen FU, Zhe XU, Peiyue LI, Dong ZENG, Minghui ZHANG, Yanxin ZHAO, Junhao CHU, authorCompany=null, correspAuthors=Wen FU, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1319294755020853777, articleId=1319294750004466156, tenantId=1146029695717560320, journalId=1316781260334530699, language=CN, title=翼型通道滑油冷却器流动换热特性研究, columnId=1317484287230853622, journalTitle=流体机械, columnName=设计计算, runingTitle=null, highlight=null, articleAbstract=

为了提升微通道滑油冷却器设计准确度,以翼型微通道滑油冷却器为研究对象,开展滑油在翼型通道印刷电路板式换热器(PCHE)中的流动换热数值计算和试验研究,重点研究了滑油入口温度和流速对换热器流阻和换热性能的影响,并拟合滑油在翼型通道中的Nu和f的准则关联式。结果表明,数值计算结果和试验结果的最大误差控制在20%以内,表明数值计算模型可靠;流速是影响热侧Nuh的关键因素,温度影响较弱,在研究工况范围内,流速从0.2 m/s提升到1 m/s,Nuh增加约78%,而温度升高10 K,对应Nuh变化仅为0.1~0.2;温度和流速对压降有显著影响,热侧压降与滑油入口流速呈正相关,流速从0.2 m/s提升到1 m/s,压降增加270%~300%;当热侧入口流速恒定时,随着油温升高,热侧压降减小,温度升高10 K,压降降低8 460~48 800 Pa;Nu和f的拟合准则关联式最大误差分别为6.23%和11.68%。研究结果可为微通道滑油冷却器的准确设计提供理论依据。

, authors=石瑞芳1, 付文1, 徐哲1, 李培跃1, 曾东1, 张明辉1, 赵严鑫2, 楚俊豪1, authorsList=石瑞芳, 付文, 徐哲, 李培跃, 曾东, 张明辉, 赵严鑫, 楚俊豪, authorCompany=null, correspAuthors=付文, authorNote=

石瑞芳(1996),女,博士,工程师,主要从事微通道换热器设计工作,E-mail:。

, correspAuthorsNote=
付文(1988),女,博士,研究员,主要从事特种换热器开发制造研究工作,通信地址:471032河南省洛阳市涧西区滨河北路32号中国船舶集团有限公司第七二五研究所,E-mail:。
, copyrightStatement=作者向本刊所投稿件一经本刊录用,则该论文的复制权、发行权、信息网络传播权、翻译权、汇编权等权利视为自动转让给本刊。本刊为国内各主要数据库收录期刊,本刊所发表的稿件将同时通过互联网进行网络出版或提供信息服务。, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=HvTmgcypUEzcxRCMSyMooA==, magXml=8U9o9zk2oMpR3J879axXcw==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=qnLgeJuaykV884cVPOZbzQ==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=vTgSzhRhKDUSmlqpQtlqTA==, mapNumber=null, fund=null)}, authors=[Author(id=1319294755402535449, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=m18838965863@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1319294755469644315, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, authorId=1319294755402535449, language=EN, stringName=Ruifang SHI, firstName=Ruifang, middleName=null, lastName=SHI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, address=1Luoyang Ship Material Research Institute,Luoyang 471032,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1319294755532558876, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, authorId=1319294755402535449, language=CN, stringName=石瑞芳, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, address=1中国船舶集团有限公司 第七二五研究所,河南 洛阳 471032, bio={"content":"

石瑞芳(1996),女,博士,工程师,主要从事微通道换热器设计工作,E-mail:。

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石瑞芳(1996),女,博士,工程师,主要从事微通道换热器设计工作,E-mail:。

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year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=18, rfOrder=28, authorNames=null, journalName=null, refType=null, unstructuredReference=沈亚杰.板壳式滑油冷却器强化换热研究[D].哈尔滨:哈尔滨工程大学,2016., articleTitle=null, refAbstract=null), Reference(id=1319294767935115915, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=18, rfOrder=29, authorNames=null, journalName=null, refType=null, unstructuredReference=SHEN Y J.Research on enhancing heat transfer performance of circular plate and shell oil cooler[D].Harbin:Harbin Engineering University,2016., articleTitle=null, refAbstract=null), Reference(id=1319294768010613388, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=19, rfOrder=30, authorNames=null, journalName=null, refType=null, unstructuredReference=WANG W Q,QIU Y,HE Y L,et al.Experimental study on the heat transfer performance of a molten‑salt printed circuit heat exchanger with airfoil fins for concentrating solar power[J].International Journal of Heat and Mass Transfer,2019,135:837-846., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1319294755238957586, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, xref=1, ext=[AuthorCompanyExt(id=1319294755247346195, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, companyId=1319294755238957586, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1Luoyang Ship Material Research Institute,Luoyang 471032,China), AuthorCompanyExt(id=1319294755255734804, 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tableContent=null), ArticleFig(id=1319294763765977706, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, language=EN, label=Tab.1, caption=

Geometric model parameters

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参数数值
长度/mm339
宽度/mm6
高度/mm3
弦长/mm5
横向间距/mm10
纵向间距/mm3
交错间距/mm5
), ArticleFig(id=1319294763837280875, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, language=CN, label=表1, caption=

几何模型参数

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参数数值
长度/mm339
宽度/mm6
高度/mm3
弦长/mm5
横向间距/mm10
纵向间距/mm3
交错间距/mm5
), ArticleFig(id=1319294763929555564, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, language=EN, label=Tab.2, caption=

Property fitting coefficients of 68# lubricating oil

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项目密度ρ/(kg⋅m-3)比热cp/(J⋅kg-1⋅K-1)导热系数λ/(W⋅m-1⋅K-1)动力黏度μ/
(kg⋅m-1⋅s-1)
A11×10-5-0.000 1-2×10-92×10-7
A2-0.015 40.146 83×10-6-0.000 2
A37.357 3-70.107-0.001 50.105 9
A4-1 559.414 8800.311 9-22.857
A0124 848-1×106-24.6381 851.5
R20.999 90.999 70.999 20.999 9
), ArticleFig(id=1319294764005053037, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319294750004466156, language=CN, label=表2, caption=

68#润滑油的物性拟合系数

, figureFileSmall=null, figureFileBig=null, tableContent=
项目密度ρ/(kg⋅m-3)比热cp/(J⋅kg-1⋅K-1)导热系数λ/(W⋅m-1⋅K-1)动力黏度μ/
(kg⋅m-1⋅s-1)
A11×10-5-0.000 1-2×10-92×10-7
A2-0.015 40.146 83×10-6-0.000 2
A37.357 3-70.107-0.001 50.105 9
A4-1 559.414 8800.311 9-22.857
A0124 848-1×106-24.6381 851.5
R20.999 90.999 70.999 20.999 9
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翼型通道滑油冷却器流动换热特性研究
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石瑞芳 1 , 付文 1 , 徐哲 1 , 李培跃 1 , 曾东 1 , 张明辉 1 , 赵严鑫 2 , 楚俊豪 1
流体机械 | 设计计算 2025,53(11): 99-106
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流体机械 |设计计算 2025 , 53 (11) : 99 -106
翼型通道滑油冷却器流动换热特性研究
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石瑞芳1 , 付文1 , 徐哲1, 李培跃1, 曾东1, 张明辉1, 赵严鑫2, 楚俊豪1
作者信息
  • 1中国船舶集团有限公司 第七二五研究所,河南 洛阳 471032
  • 2哈尔滨工程大学,哈尔滨 150001
通讯作者:
付文(1988),女,博士,研究员,主要从事特种换热器开发制造研究工作,通信地址:471032河南省洛阳市涧西区滨河北路32号中国船舶集团有限公司第七二五研究所,E-mail:。
作者简介:

石瑞芳(1996),女,博士,工程师,主要从事微通道换热器设计工作,E-mail:。

Study on flow and heat transfer characteristics of airfoil channel oil cooler
Ruifang SHI1 , Wen FU1 , Zhe XU1, Peiyue LI1, Dong ZENG1, Minghui ZHANG1, Yanxin ZHAO2, Junhao CHU1
Affiliations
  • 1Luoyang Ship Material Research Institute,Luoyang 471032,China
  • 2Harbin Engineering University,Harbin 150001,China
出版时间: 2025-11-30 doi: 10.3969/j.issn.1005-0329.2025.11.013
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为了提升微通道滑油冷却器设计准确度,以翼型微通道滑油冷却器为研究对象,开展滑油在翼型通道印刷电路板式换热器(PCHE)中的流动换热数值计算和试验研究,重点研究了滑油入口温度和流速对换热器流阻和换热性能的影响,并拟合滑油在翼型通道中的Nu和f的准则关联式。结果表明,数值计算结果和试验结果的最大误差控制在20%以内,表明数值计算模型可靠;流速是影响热侧Nuh的关键因素,温度影响较弱,在研究工况范围内,流速从0.2 m/s提升到1 m/s,Nuh增加约78%,而温度升高10 K,对应Nuh变化仅为0.1~0.2;温度和流速对压降有显著影响,热侧压降与滑油入口流速呈正相关,流速从0.2 m/s提升到1 m/s,压降增加270%~300%;当热侧入口流速恒定时,随着油温升高,热侧压降减小,温度升高10 K,压降降低8 460~48 800 Pa;Nu和f的拟合准则关联式最大误差分别为6.23%和11.68%。研究结果可为微通道滑油冷却器的准确设计提供理论依据。

微通道滑油冷却器  /  印刷电路板式换热器(PCHE)  /  流动换热特性  /  翼型通道

To improve the design accuracy of microchannel oil coolers,numerical calculations and experimental studies on flow and heat transfer of oil in airfoil‑channel printed circuit heat exchangers (PCHE) were conducted,focusing on the impact of oil inlet temperature and flow velocity on the flow resistance and heat transfer performance of the heat exchanger.Empirical correlations for Nu and f of oil in airfoil channels were fitted.The results show that the maximum error between numerical calculations and experimental results is within 20%,indicating the reliability of the numerical model.Flow velocity is a key factor affecting the thermal‑side Nuh,while temperature has a weaker influence.Within the studied operating range,increasing the flow velocity from 0.2 m/s to 1 m/s raises Nuh by approximately 78%,whereas a temperature increase of 10 K only changes Nuh by 0.1~0.2.Both temperature and flow velocity significantly affect pressure drop.Thermal‑side pressure drop is positively correlated with oil inlet flow velocity,increasing by 270%~300% as flow velocity rises from 0.2 m/s to 1 m/s.When the thermal‑side inlet flow velocity is constant,pressure drop decreases with rising oil temperature.A temperature increase of 10 K reduces pressure drop by 8 460~48 800 Pa.The maximum errors of the fitted empirical correlations for Nu and f are 6.23% and 11.68%,respectively.The research results provide a theoretical basis for the accurate design of microchannel oil coolers.

microchannel oil cooler  /  printed circuit heat exchanger (PCHE)  /  flow and heat transfer characteristics  /  airfoil channel
石瑞芳, 付文, 徐哲, 李培跃, 曾东, 张明辉, 赵严鑫, 楚俊豪. 翼型通道滑油冷却器流动换热特性研究. 流体机械, 2025 , 53 (11) : 99 -106 . DOI: 10.3969/j.issn.1005-0329.2025.11.013
Ruifang SHI, Wen FU, Zhe XU, Peiyue LI, Dong ZENG, Minghui ZHANG, Yanxin ZHAO, Junhao CHU. Study on flow and heat transfer characteristics of airfoil channel oil cooler[J]. Fluid Machinery, 2025 , 53 (11) : 99 -106 . DOI: 10.3969/j.issn.1005-0329.2025.11.013
船舶动力装置中的润滑油对设备进行润滑后温度显著升高,需要通过滑油冷却器进行降温。滑油冷却器的效能直接影响整个动力系统的性能水平,油的低导热与高黏度特性引起学者们对其性能的广泛关注[1-5]。传统换热器形式有管壳式和板式,管壳式换热器的体积和重量大,换热效率低,而板式换热器容易泄漏,并不符合滑油换热器需求。微通道滑油冷却器尤其适用于空间受限下的热交换,契合新型滑油冷却器的性能需求,具有十分广阔的应用前景。
印刷电路板式换热器(PCHE)是一种基于微通道技术的新型高效换热装置,应用日益广泛[6-9]。通道当量直径设计范围集中在毫米级,单层金属薄板的厚度控制在5 mm以下[10]。PCHE的结构如图1所示。余智强[11]针对飞行器滑油系统用燃油-滑油冷却器,进行流动与换热特性研究,其选用的PCHE形式为常规直通道。
非连续型通道PCHE由日本学者TSUZUK提出,因其优越的热工水力特性而引发广泛关注[12]。非连续翼型通道结构如图2所示。
LIU等[13]通过试验分析了超临界碳氢燃料与水在翼型通道PCHE中的热工水力性能,开发了Nu与摩擦系数f的关联式(Nu偏差±20%,f偏差±8%),结果显示,层流状态下,翼型通道的f为直通道的2.93倍;当Re>334时,其Nu是直通道、锯齿形和S形通道时的7.74倍,3.15倍和1.65倍,传热性能最优,且整体热力学性能随Re增加而提升,为超临界工况下翼型通道PCHE的设计提供依据。殷泽等[14]对印刷电路板式换热器(PCHE)中非直线型微通道内摩擦因子关联式进行了全面总结,系统综述了基于He、CO2和H2O等工质的摩擦因子关联式。肖欣悦等[15]研究发现,翼型通道换热效率的降低幅度显著低于其压降的减小幅度,表明通过翼型形状和排布优化布置可进一步提升综合性能。CHU等[16]研究表明,增大翼型的迎风面积并缩短翼型长度,能够提高PCHE的整体传热效率。刘晨等[17]采用正交试验法,确定了冷、热侧工质都是熔盐时翼型排布的最优参数组合,即横向间距4 mm、纵向间距9 mm且交错距离4 mm时,能量利用效率达到峰值。综上所述,目前关于翼型通道PCHE换热的研究,多围绕熔盐、水、超临界碳氢等介质,少有研究滑油此类高粘介质。
本文以翼型通道滑油冷却器为研究对象,开展滑油在翼型通道PCHE中的流动换热数值计算和试验研究;同时,通过对比数值计算结果和试验结果,验证数值计算模型的可靠性;拟合滑油在翼型通道中的Nu和f的准则关联式,为微通道滑油冷却器的准确设计提供理论依据。
基于PCHE的周期性对称特征,沿流动方向及垂直流动方向截取最小重复单元建立几何模型,如图3所示。其通道为NACA0020翼型,具体参数见表1。沿流动方向选取33个最小结构单元,模型在通道进出口各增设20 mm流体延伸段,使冷热侧流体充分流动,以消除边界条件导致的回流干扰。
质量守恒方程:
∂ρ∂t+∂(ρu)∂x+∂(ρv)∂y+∂(ρw)∂z=0
式中,u,v,w为x,y,z方向上的速度分量,m/s;ρ为流体密度,kg/m3;t为时间,s。
动量守恒方程:
∂u∂t+u∂u∂x+v∂u∂y+w∂u∂z
=-1ρ∂p∂x+μρ(∂2u∂x2+∂2u∂y2+∂2u∂z2)
∂v∂t+u∂v∂x+v∂v∂y+w∂v∂z
=-1ρ∂p∂y+μρ(∂2v∂x2+∂2v∂y2+∂2v∂z2)
∂w∂t+u∂w∂x+v∂w∂y+w∂w∂z
=-1ρ∂p∂z+μρ(∂2w∂x2+∂2w∂y2+∂2w∂z2)
式中,p为流体的压力;μ为流体动力黏度。
能量守恒方程:
∂T∂t+u∂T∂x+v∂T∂y+w∂T∂z
=λρcp(∂2T∂x2+∂2T∂y2+∂2T∂z2)+Sh+Φρ
式中,T为温度;λ为流体的导热系数;cp为流体的比热容;Sh为流体的内热源;Ф为黏度耗散项。
选用液态水为冷侧流体,冷却器固体材料为不锈钢。热侧流体为68#润滑油,根据文献[18]中数据拟合多项式y=A0+A1x+A2x2+A3x3+A4x4,各物性参数拟合得到系数见表2。拟合精度R2>0.99,满足计算精度要求。
采用数值模拟软件FLUENT,模型的上下和左右壁面均设置为周期性边界。冷热侧流体入口均采用速度入口,出口为静压出口,延伸段及非传热壁面设为绝热边界,流固交界面设置为耦合壁面。采用基于压力的隐式双精度求解器进行计算,依据滑油的高黏度特性及低雷诺数的研究范围,选择层流模型,采用SIMPLE算法处理压力速度耦合,引入亚松弛因子(αp=0.3,αv=0.7)提升收敛稳定性。动量方程采用二阶迎风格式,能量方程启用QUICK格式。当连续性方程、动量方程和能量方程的残差均下降到10-6,判定计算收敛。
采用非结构化多面体网格对计算域进行填充。在流固耦合界面处构建边界层网格,初始层厚度为0.05 mm,每层增长率1.2,共计5层。网格划分如图4所示。
为评估网格密度对数值解的潜在影响,改变局部尺寸生成5组差异化网格。验证工况设置如下:水侧入口温度302.15 K,油侧进口温度330.15 K,水侧进口流速0.6 m/s,油侧入口流速0.5 m/s。取热侧出口温度和热侧进出口压差作为监测参数,计算结果如图5所示。当网格单元数超过683万时,监测参数的变化已不再明显。进一步加密至单元数819万,计算结果差异仅为0.3%。综合考虑计算效率与精度,选定网格单元数683万,对应网格尺寸0.12 mm。
为了验证计算模型和方法的准确性,设计翼型通道试验件,开展了翼型通道滑油冷却器的流动与传热试验。翼型通道滑油冷却器试验件如图6所示。
冷却器的芯体板片如图7所示,冷热侧板片各34张,材料为S31603,上下两端为厚度10 mm的不锈钢板。该试验件芯体部分尺寸为500 mm×120 mm×118 mm。每个板片上共有35个非连续翼型通道,翼型翅片结构如图8所示(翼型和排布方式同图3)。其中,板片进出口的导流区长度为70 mm,中间换热通道部分的长度为335 mm。
设计的试验系统见图9。通过改变系统的滑油温度、滑油流量、水温、水流量等重要参数,完成不同工况下的试验研究。试验测试段实物图见图10。
试验热平衡误差控制在5%以内,以每种试验工况下冷热侧入口温度和质量流量作为冷热侧流体的入口边界条件,出口设置为压力出口。模拟计算得到每种工况下芯体热侧进出口温差和压降的计算结果,与试验结果进行对比,如图11所示。从图11可以看出,每组工况的热侧进出口温差和热测压降的偏差均控制在20%以内。尽管存在局部偏差,但整体模拟趋势与试验结果契合程度较高,表明数值模型能够有效预测翼型通道滑油冷却器的热工水力特性。同时,还可以看出,大部分热侧进出口温差较试验得到的热侧进出口温差偏大,而模拟计算得到的热侧进出口压降与试验所得结果相比则偏小,分析其原因:真空扩散焊工艺可能引起通道局部形变,导致实际通道截面积小于设计值,工质流速增加使得换热量和压降都高于模拟值;另外,试验件板片蚀刻表面的粗糙度未被模型完全表征,实际流动阻力大于理想光滑壁面。
热侧总换热量Q通过热力学平衡方程计算:
Q=qmcp(Tin-Tout)
式中,qm为热侧滑油质量流量,kg/m3。
热侧对流换热系数hh计算式如下:
hh=QAs(Ts-Tw)
式中,As为热侧滑油与固体壁面的接触面积,m2;Ts为热侧滑油的定性温度,即滑油进出口温度的平均值,K;Tw为热侧壁面的平均温度,K。
针对翼型通道PCHE内部结构的非均匀特征,其平均水力直径需通过最小对称单元分析确定[12]。冷热侧通道的最小对称单元见图12,由横向翅片间距W、交错布置间距L及通道高度H构成。
平均水力直径Dh可通过下式计算:
Dh=4Vh/S
Vh=(LW-Sa)H
S=PaH+2L-LcH+2LW-Sa
式中,Vh为流体最小对称单元的体积,m3;S为最小对称单元的湿润面积,m2;Pa为翼型的周长,m,Pa=10.22 mm;Lc为翼型的弦长,m,Lc=5 mm;Sa为翼型的表面积,m2,Sa=3.421 mm2。
流体平均雷诺数Re定义如下:
Re=vρDhu
热侧努塞尔数Nuh表征对流换热强度:
Nuh=hhDhλs
式中,λs为热侧滑油的热导率,W/(m⋅K)。
热侧摩擦因子f通过达西-魏斯巴赫公式计算:
f=(Pin-Pout)Dh2Ltρsv2
式中,Pin,Pout分别为热侧滑油的进口压强、出口压强,Pa;Lt为热侧滑油换热段的总长度,m;ρs为热侧滑油的密度,kg/m3。
热侧滑油的定性温度:
Ts=Tin+Tout2
以上计算过程中涉及的滑油物性参数,均为定性温度下的数值。
热侧滑油的温度和Re与热侧Nuh的关系如图13所示(每条曲线上对应流速在0.2~1 m/s之间变化)。从图可以看出,热侧Nuh与Re呈正相关关系。随着热侧滑油入口流速的增大,Re增加,热侧Nuh的增速会减慢。热侧流速从0.2 m/s上升到1 m/s,Nuh增加约78%。而同样流速下,滑油温度越高,对应雷诺数增加,Nuh略有降低,变化并不明显。温度升高10 K,对应Nuh变化仅为0.1~0.2。在研究工况下,滑油在翼型通道中的流动形态为层流,流速是影响热侧Nuh的关键因素,温度对热侧Nuh的影响次之。
热侧压降随热侧来流参数(温度和入口流速)的变化规律如图14所示。从图可以看出,热侧压降与滑油入口流速呈正相关,流速从0.2 m/s上升到1 m/s时,压降增加270%~300%;在恒定热侧入口流速下,随着油温升高,热侧压降降低,温度升高10 K,压降降低8 460~48 800 Pa,这与滑油黏性温度特性揭示的黏度随温度升高而降低的规律一致。
选择热侧流体平均雷诺数为20、入口温度为333.15 K的工况,截取距离入口段15 mm的热侧流体区域作为观测区域,翼型通道的局部速度云图如图15所示。翼型通道截面的连续变化导致流体的流速及流向沿流动长度方向周期性变化,这显著破坏了流动边界层,起到了强化换热的效果。
根据上述27组模拟计算结果,通过量纲分析和非线性回归方法,进行了适用于翼型微通道滑油冷却器的Nu和f因子的经验关联式总结,为工程设计提供理论依据。
考虑到热侧壁面附近流体边界层内滑油的黏度与中间流体存在一定差异,在翼型通道PCHE的Nu关联式中会加入黏度修正因子[17,19]。拟合出Nu经验关联式(R2=0.972):
Nu=0.370 82Re0.878Pr1/3(μ/μw)0.14
其中,Re=4~45,Pr=440~940,μ/μw=0.32~0.69。
通过计算结果与拟合公式的对比验证,评估了经验关联式的可靠性,结果见图16。
可以看出,拟合公式与模拟值的分布呈现良好的一致性,Nu的模拟值与拟合值的最大相对误差为6.23%,其余数据的误差均控制在5%以内。
拟合出f因子经验关联式(R2=0.984):
f=21.7Re-0.944 92
其中,Re=4~45。
f因子拟合的经验公式与数值计算结果的对比如图17所示。两者在阻力特性预测上呈现良好的一致性,最大相对误差为11.68%,且大部分数据点的误差分布在±8%范围内。
(1)滑油在翼型通道中的流动形态为层流,流速是影响热侧Nuh的关键因素,温度影响较弱。研究工况范围内,流速从0.2 m/s上升到1 m/s,Nuh增加约78%。而温度升高10 K,对应Nuh变化仅为0.1~0.2。
(2)温度和流速对压降都有显著的影响。热侧压降与滑油入口流速呈正相关,流速从0.2 m/s上升到1 m/s,压降增加270%~300%。当热侧入口流速恒定时,随着油温升高,热侧压降降低,温度升高10 K,压降降低8 460~48 800 Pa。
(3)拟合了滑油在翼型通道中的Nu和f的准则关联式,最大误差分别为6.23%和11.68%。为微通道滑油冷却器的准确设计提供了理论依据。

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doi: 10.3969/j.issn.1005-0329.2025.11.013
  • 接收时间:2025-06-14
  • 首发时间:2026-10-20
  • 出版时间:2025-11-30
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  • 收稿日期:2025-06-14
  • 修回日期:2025-10-10
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    1中国船舶集团有限公司 第七二五研究所,河南 洛阳 471032
    2哈尔滨工程大学,哈尔滨 150001

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付文(1988),女,博士,研究员,主要从事特种换热器开发制造研究工作,通信地址:471032河南省洛阳市涧西区滨河北路32号中国船舶集团有限公司第七二五研究所,E-mail:。
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2种不同金属材料的力学参数
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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