Article(id=1319293318496900070, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1319293220169826420, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1005-0329.2025.06.002, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1727971200000, receivedDateStr=2024-10-04, revisedDate=1742832000000, revisedDateStr=2025-03-25, acceptedDate=null, acceptedDateStr=null, onlineDate=1792473638414, onlineDateStr=2026-10-20, pubDate=1751212800000, pubDateStr=2025-06-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792473638414, onlineIssueDateStr=2026-10-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792473638414, creator=13701087609, updateTime=1792473638414, updator=13701087609, issue=Issue{id=1319293220169826420, tenantId=1146029695717560320, journalId=1316781260334530699, year='2025', volume='53', issue='6', pageStart='1', pageEnd='118', issueExtLink='null', onlineDate='null', pubDate='1751212800000', pubDateStr='2025-06-30', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792473614971, creator='13701087609', updateTime=1792473614971, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=9, endPage=15, ext={EN=ArticleExt(id=1319293318748558311, articleId=1319293318496900070, tenantId=1146029695717560320, journalId=1316781260334530699, language=EN, title=Experimental study of pressure drop in the first type of leakage channel of single screw compressor, columnId=null, journalTitle=Fluid Machinery, columnName=null, runingTitle=null, highlight=null, articleAbstract=

In order to investigate the leakage law of gas-liquid two‑phase flow in the first type leakage channel of single screw compressor under different conditions,the first type of leakage channel of a single screw compressor was simplified as a narrow channel,and the meshing clearance was the height.Using nitrogen as the gas phase medium and deionized water and glycerol solution as the liquid phase medium to study the influence low of pressure loss of gas-liquid two‑phase flow in narrow channels with the changes of gas‑liquid velocity,channel height and liquid viscosity.The results show that the pressure drop increases with the increase of gas‑liquid velocity,and the influence of liquid velocity on pressure drop is significantly greater than that of gas velocity.At a same gas‑liquid velocity,the pressure drop rapidly decreases with the increase of channel height.The pressure drop decreases the most when the height increases from 0.03 mm to 0.05 mm,and the pressure drop decreases less when the height increases from 0.05 mm to 0.08 mm.When the liquid phase velocity increases from 0.14 m/s to 0.28 m/s,the pressure drop of water,20% glycerol solution and 40% glycerol solution increase from 3.01 kPa,4.39 kPa and 8.61 kPa to 5.81 kPa,7.80 kPa and 15.5 kPa,respectively.A new correlation equation is fitted by modifying the Chisholm parameters of the split phase flow model,which can effectively predict the pressure drop in narrow channels with heights ranging from 0.01 mm to 0.08 mm,and a maximum deviation of no more than 25%.The research can provide theoretical reference for the design and manufacturing of single screw compressors.

, authors=Yeqiang ZHANG1, 2, Shuaibo LI1, 2, Kangli LI1, 2, Xueling ZHANG1, 2, Kai CHEN1, 2, Yanling WANG1, 2, authorsList=Yeqiang ZHANG, Shuaibo LI, Kangli LI, Xueling ZHANG, Kai CHEN, Yanling WANG, authorCompany=null, correspAuthors=Xueling ZHANG, 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=1319293322737341434, articleId=1319293318496900070, tenantId=1146029695717560320, journalId=1316781260334530699, language=CN, title=单螺杆压缩机第一类泄漏通道内压降的试验研究, columnId=1317484286475883136, journalTitle=流体机械, columnName=试验研究, runingTitle=null, highlight=null, articleAbstract=

为了探究不同条件下单螺杆压缩机第一类泄漏通道内气-液两相流的泄漏规律,将单螺杆压缩机的第一类泄漏通道简化为窄缝通道,啮合间隙即为窄缝通道的高度。以氮气为气相介质、以去离子水和甘油溶液为液相介质,研究了气液相速度、通道高度和液体黏度对窄缝通道内气-液两相流压降的影响规律。结果表明,随着气液相速度的增加,两相流压降增加,其中,液相速度对压降的影响明显大于气相速度对压降的影响;在相同气液相速度时,随着通道高度的增加,压降迅速降低,高度从0.03 mm增加到0.05 mm时,压降最大,而在高度从0.05 mm增加到0.08 mm时,压降较小;液相速度从0.14 m/s升高至0.28 m/s时,水、20%甘油溶液、40%甘油溶液的压降依次从3.01,4.39,8.61 kPa增大至5.81,7.80,15.5 kPa;通过对分相流模型的Chisholm参数进行修正,拟合得到新的关联式,能较好预测高度从0.01~0.08 mm的窄缝通道内的压降,最大偏差不超过25%。研究可为单螺杆压缩机的设计和制造提供理论参考。

, authors=张业强1, 2, 李帅博1, 2, 李康利1, 2, 张雪龄1, 2, 陈凯1, 2, 王燕令1, 2, authorsList=张业强, 李帅博, 李康利, 张雪龄, 陈凯, 王燕令, authorCompany=null, correspAuthors=张雪龄, authorNote=

张业强(1981),男,博士,副教授,主要从事特种压缩机、高压无油压缩机的研发,E-mail:。

, correspAuthorsNote=
张雪龄(1986),女,博士,副教授,主要从事多孔介质的流动换热、热储能等研究,通信地址:450002河南省郑州市高新区科学大道136号郑州轻工业大学能源与动力工程学院,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=Ib1MWaHjhCSUxTFzxLB+Ig==, magXml=a1+gyyQgFpuTTiB2W8oRrw==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=QvhYqcZ8JifzhurjrdYBKQ==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=0fMu6bXMbuOUF9tMRXYYmQ==, mapNumber=null, fund=null)}, authors=[Author(id=1319293323156770817, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293318496900070, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=zhangyeqiang@zzuli.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1319293323236462596, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293318496900070, authorId=1319293323156770817, language=EN, stringName=Yeqiang ZHANG, firstName=Yeqiang, middleName=null, lastName=ZHANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, 2, address=1School of Energy and Power Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China
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张业强(1981),男,博士,副教授,主要从事特种压缩机、高压无油压缩机的研发,E-mail:。

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张业强(1981),男,博士,副教授,主要从事特种压缩机、高压无油压缩机的研发,E-mail:。

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Experimental instrumentation

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仪器型号精度
气体流量计MF-100C0.5%
注射泵LINZ-8A0.2%
压差变送器30510.05%
数据采集仪34972A0.004%
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试验仪器

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仪器型号精度
气体流量计MF-100C0.5%
注射泵LINZ-8A0.2%
压差变送器30510.05%
数据采集仪34972A0.004%
), ArticleFig(id=1319293328236073022, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1319293318496900070, language=EN, label=Tab.2, caption=

Physical properties of liquids

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液体密度ρ/(kg·m-3)黏度μ/(mPa·s)表面张力σ/(N·m-1)
去离子水9981 0050.073 1
20%甘油溶液1 0601 5500.063 2
40%甘油溶液1 1202 5400.062 5
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液体的物理性质

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液体密度ρ/(kg·m-3)黏度μ/(mPa·s)表面张力σ/(N·m-1)
去离子水9981 0050.073 1
20%甘油溶液1 0601 5500.063 2
40%甘油溶液1 1202 5400.062 5
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单螺杆压缩机第一类泄漏通道内压降的试验研究
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张业强 1, 2 , 李帅博 1, 2 , 李康利 1, 2 , 张雪龄 1, 2 , 陈凯 1, 2 , 王燕令 1, 2
流体机械 | 试验研究 2025,53(6): 9-15
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流体机械 |试验研究 2025 , 53 (6) : 9 -15
单螺杆压缩机第一类泄漏通道内压降的试验研究
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张业强(1981),男,博士,副教授,主要从事特种压缩机、高压无油压缩机的研发,E-mail:。

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张业强1, 2 , 李帅博1, 2, 李康利1, 2, 张雪龄1, 2 , 陈凯1, 2, 王燕令1, 2
作者信息
  • 1郑州轻工业大学 能源与动力工程学院,郑州 450002
  • 2河南省能源高效转化与利用国际联合实验室,郑州 450002
通讯作者:
张雪龄(1986),女,博士,副教授,主要从事多孔介质的流动换热、热储能等研究,通信地址:450002河南省郑州市高新区科学大道136号郑州轻工业大学能源与动力工程学院,E-mail:。
作者简介:

张业强(1981),男,博士,副教授,主要从事特种压缩机、高压无油压缩机的研发,E-mail:。

Experimental study of pressure drop in the first type of leakage channel of single screw compressor
Yeqiang ZHANG1, 2 , Shuaibo LI1, 2, Kangli LI1, 2, Xueling ZHANG1, 2 , Kai CHEN1, 2, Yanling WANG1, 2
Affiliations
  • 1School of Energy and Power Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China
  • 2Henan International Joint Laboratory for Energy Efficiency Conversion and Utilization,Zhengzhou 450002,China
出版时间: 2025-06-30 doi: 10.3969/j.issn.1005-0329.2025.06.002
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为了探究不同条件下单螺杆压缩机第一类泄漏通道内气-液两相流的泄漏规律,将单螺杆压缩机的第一类泄漏通道简化为窄缝通道,啮合间隙即为窄缝通道的高度。以氮气为气相介质、以去离子水和甘油溶液为液相介质,研究了气液相速度、通道高度和液体黏度对窄缝通道内气-液两相流压降的影响规律。结果表明,随着气液相速度的增加,两相流压降增加,其中,液相速度对压降的影响明显大于气相速度对压降的影响;在相同气液相速度时,随着通道高度的增加,压降迅速降低,高度从0.03 mm增加到0.05 mm时,压降最大,而在高度从0.05 mm增加到0.08 mm时,压降较小;液相速度从0.14 m/s升高至0.28 m/s时,水、20%甘油溶液、40%甘油溶液的压降依次从3.01,4.39,8.61 kPa增大至5.81,7.80,15.5 kPa;通过对分相流模型的Chisholm参数进行修正,拟合得到新的关联式,能较好预测高度从0.01~0.08 mm的窄缝通道内的压降,最大偏差不超过25%。研究可为单螺杆压缩机的设计和制造提供理论参考。

单螺杆压缩机  /  第一类泄漏通道  /  窄缝通道  /  压降

In order to investigate the leakage law of gas-liquid two‑phase flow in the first type leakage channel of single screw compressor under different conditions,the first type of leakage channel of a single screw compressor was simplified as a narrow channel,and the meshing clearance was the height.Using nitrogen as the gas phase medium and deionized water and glycerol solution as the liquid phase medium to study the influence low of pressure loss of gas-liquid two‑phase flow in narrow channels with the changes of gas‑liquid velocity,channel height and liquid viscosity.The results show that the pressure drop increases with the increase of gas‑liquid velocity,and the influence of liquid velocity on pressure drop is significantly greater than that of gas velocity.At a same gas‑liquid velocity,the pressure drop rapidly decreases with the increase of channel height.The pressure drop decreases the most when the height increases from 0.03 mm to 0.05 mm,and the pressure drop decreases less when the height increases from 0.05 mm to 0.08 mm.When the liquid phase velocity increases from 0.14 m/s to 0.28 m/s,the pressure drop of water,20% glycerol solution and 40% glycerol solution increase from 3.01 kPa,4.39 kPa and 8.61 kPa to 5.81 kPa,7.80 kPa and 15.5 kPa,respectively.A new correlation equation is fitted by modifying the Chisholm parameters of the split phase flow model,which can effectively predict the pressure drop in narrow channels with heights ranging from 0.01 mm to 0.08 mm,and a maximum deviation of no more than 25%.The research can provide theoretical reference for the design and manufacturing of single screw compressors.

single screw compressor  /  the first type of leakage channel  /  narrow channels  /  pressure drop
张业强, 李帅博, 李康利, 张雪龄, 陈凯, 王燕令. 单螺杆压缩机第一类泄漏通道内压降的试验研究. 流体机械, 2025 , 53 (6) : 9 -15 . DOI: 10.3969/j.issn.1005-0329.2025.06.002
Yeqiang ZHANG, Shuaibo LI, Kangli LI, Xueling ZHANG, Kai CHEN, Yanling WANG. Experimental study of pressure drop in the first type of leakage channel of single screw compressor[J]. Fluid Machinery, 2025 , 53 (6) : 9 -15 . DOI: 10.3969/j.issn.1005-0329.2025.06.002
随着人类社会的快速发展,对能源的需求逐渐增大,导致化石能源的消耗和二氧化碳排放量的上升。因此,需要寻找更加环保清洁、安全高效的新能源来代替传统化石能源[1]。
水蒸气高温热泵能够实现低温余热的高效回收利用,已成为提高能源利用率、降低碳排放的重要手段[2-4]。压缩机作为通用设备,在各个行业都被广泛应用[5]。压缩机结构种类众多,不同产品的应用场景、市场占比差异较大[6]。单螺杆压缩机是一种回转容积式压缩机,具有结构简单、运动可靠、体积小、重量轻、动力平衡好、压力脉动小、噪声低及易于实现能量调节等优点,非常适合作为水蒸气高温热泵的压缩机[7-9]。然而,由于单螺杆压缩机工作容积由螺杆螺槽壁面、星轮齿面和机壳内壁包围而成,相互之间存在一定高度的啮合间隙,从而形成泄漏通道,如图1所示。单螺杆压缩机的泄漏通道可以分为3类:第一类为星轮、螺杆分别与壳体内壁之间构成的间隙:包括星轮平面与壳体内壁面之间的间隙L6,螺槽前、后侧外缘与壳体内壁面之间的间隙L7与L8,螺槽排气端外缘与壳体内壁之间的间隙L9,共4条泄漏通道;第二类为星轮与螺杆螺槽之间构成的间隙:由星轮齿顶与螺槽底面之间的间隙L1和星轮齿前、后侧与螺槽侧面之间的间隙L2与L4共3条泄漏通道构成;第三类为星轮、螺杆及壳体之间的围成的径向泄漏孔,即泄漏通道L3与L5[10]。
对于单螺杆压缩机,喷入工作腔内的液体以两种形态存在:一部分被雾化为微小的液滴,与腔室气体均匀混合并进行换热,实现冷却降温;另一部分被壁面捕捉,在腔室壁面上形成液膜从而起到润滑和密封作用,并最终影响压缩机的工作性能[11-14]。吴建华等[15]综合不同模型中的优点,建立适合各泄漏通道流态的数学模型,同时开展泄漏、喷油量、喷油温度及排气口位置等主要因素,对单螺杆喷油压缩机性能影响的初步分析和试验研究。林强等[16]对于喷油雾化进行了理论分析,引入韦伯数We来评价润滑油在压缩腔中的雾化程度,研究结果表明,单螺杆压缩机喷油的韦伯数应不小于60。辛电波等[17]把两相流动的研究方法应用到喷油压缩机内微小间隙中的油气两相泄漏中,研究流动特性对泄漏量的影响。LI等[18]通过模拟研究了单螺杆压缩机转速、排气压力、喷水比、液滴尺寸等参数,对水润滑单螺杆空气压缩机的性能影响规律。LU等[19]通过研究啮合间隙对制冷压缩机性能影响规律,建议啮合间隙取值在0.01~0.08 mm之间。WANG等[20-21]基于工作腔喷液的几何模型提出了喷液过程理论计算方法,对单螺杆压缩机工作腔喷液的机理进行研究。
相关研究人员对这三类泄漏通道建立了不同的模型,用于研究泄漏量的大小及其对单螺杆压缩机性能的影响。然而,泄漏通道内油-气混合流的流动规律和机理并未展开深入的研究。鉴于第一类泄漏通道占总泄漏量比例较高[22],且其截面高度为啮合高度,泄漏通道的弯曲半径远大于啮合高度(103倍以上),故文中将第一类泄漏通道简化为窄缝通道,并通过研究窄缝通道内气-液两相流的压降变化,揭示单螺杆压缩机第一类泄漏通道内,在不同条件下气-液两相流的泄漏规律,为单螺杆压缩机的设计和制造提供理论参考。
试验主要研究窄缝通道内气-液两相流的压降,试验分别以氮气为气相、去离子水和不同浓度的甘油溶液为液相。气-液两相流的试验装置主要由试验件、气体流量计、注射泵、压差变送器、数据采集仪等组成,在减压阀和气体流量计之间设置有一段盘管,使节流后的气体温度升至室温,如图2所示,各仪器型号如表1所示。试验件主要由底板、铜垫、透明玻璃板和盖板组成,铜垫置于透明玻璃板和底板之间,并通过螺钉将盖板压紧实现密封,从而构成窄缝通道。如图3所示,铜垫的厚度即为通道的高度,试验采用厚度分别为0.01,0.03,0.05,0.08 mm的铜片。
试验在常温常压下进行,首先打开氮气罐,然后对减压阀和气体流量计进行调节,待气体流量计的读数稳定后,对注射泵输送溶液,调整液相和气相的流量,同时用数据采集仪对压差进行采集,每个工况下大约采集5 min。
利用表1中仪器精度,通过式(1)可计算出由直接测量误差传递引起的间接测量误差:
uN=∑jn∂N∂xjuxj20.5
式中,uN为间接测量参数的绝对误差;N为间接测量参数;xj为直接测量参数;uxj为直接测量参数的绝对误差。
间接测量参数的相对误差为:
δN=uNN×100%
由式(2)可以计算得到两相流压降的相对测量误差为1.26%。
影响窄缝通道内压降的因素很多,其中气液相速度对压降的影响较为显著。图4为通道高度h分别为0.01,0.05 mm时,气相速度vg对压降△p的影响。从图中可以看出,当通道高度h和液相速度vl不变,气相速度vg的增加,通道内压降几乎呈线性增大(图中拟合线)。当液相速度在0.057,0.11,0.22 m/s时,压降随气相速度变化曲线斜率的最大变化率为2.56%,说明在不同的液相速度时,气相速度的变化对压降的影响基本相同。
图5示出通道高度h分别为0.01,0.05 mm时,液相速度vl对压降△p的影响。可以看出,当通道高度h和气相速度vg不变,液相速度vl的增加使气液两相流体在通道内的流动阻力迅速增大,且呈线性增长。且随着气相速度vg的增加,压降随液相速度变化的曲线斜率会逐渐增大。气相速度为0.1 m/s时,曲线的斜率分别为69.43和18.99;气相速度为0.9 m/s时,曲线的斜率分别为75.94和20.64。通过对比图4和图5,发现在相同通道高度时、压降随液相速度变化曲线的斜率明显大于压降随气相速度变化曲线的斜率,说明液相速度对压降的影响起主导作用,气相速度对压降的影响相对较小。这是因为随着液相速度增加,通道内流体含气率降低,从而导致黏度增加,流动阻力增大,引起流体的压降增大。
试验测量了通道高度h分别为0.01,0.03,0.05,0.08 mm时,气-液两相流在窄缝通道内的流动压降,如图6所示。通过拟合曲线的斜率可以看出,通道高度越小,曲线斜率越大,即压降上升越快。随着通道高度的减小,摩擦压降显著增大,这是由于通道高度变小,速度梯度显著增大,切向应力随之增大,从而导致压降增大。从图6(c)中可以看出,在相同气相速度和液相速度时,随着通道高度的增加,压降会迅速降低,高度从0.03 mm增加到0.05 mm时,压降最大,分别为2.92,5.99,9.12 kPa;在高度从0.05 mm增加到0.08 mm时,压降较小,分别为0.4,1.05,1.23 kPa。
在20 ℃时,调配溶度分别为20%和40%的甘油溶液与去离子水做对比试验,液体的物理性质如表2所示。
图7示出不同液相黏度时,气-液两相流在窄缝通道(h=0.05 mm)内的流动损失的变化。随着液相流速的增加,压降呈线性增加趋势。液相为水和40%甘油混合溶液时,压降随液相流速变化曲线的斜率更大。在图7(a)(b)中,液相为水和40%甘油混合溶液时,压降随液相流速变化曲线的斜率分别为48.60,49.42,分别是液相为去离子水时曲线斜率的2.48倍和2.58倍。从图7(c)中可以看出,当气相和液相速度相同时,液相黏度越大,气-液两相流流经窄缝通道的压降越大。当气相速度为0.83 m/s、液相速度为0.14 m/s,液相黏度分别为1 005 mPa·s(去离子水)、1 550 mPa·s(20%甘油溶液)、2 540 mPa·s(40%甘油溶液)时,压降分别为3.01,4.39,8.61 kPa;当气相速度为0.83 m/s、液相速度为0.28 m/s,液相黏度分别为1 005 mPa·s(去离子水)、1 550 mPa·s(20%甘油溶液)、2 540 mPa·s(40%甘油溶液)时,压降分别为5.81,7.80,15.5 kPa。
压降的预测模型以分相流模型(将气液两相流看作是两种单相流体)为基础,并做出如下假设:
(1)气液相之间没有相互作用力,气液两相的压差可以按照单相液体或单相气体,单独流过该相在两相流中所占的过流断面时的压差计算;
(2)液相所占体积与气相所占体积之和为通道的总体积。
根据上述假设可以得知,两相流体的摩擦压降等于液相流体的摩擦压降,还等于气相流体的摩擦压降[23]:
dpdlTP=dpdlg=dpdll
其中,dpdlTP,dpdlg,dpdll分别为两相摩擦压降、气相摩擦压降和液相摩擦压降。
两相摩擦压降:
ϕl2=dpdlTP/dpdll
液相摩擦压降:
dpdll=2fg1-x2Gg2ρgDh
式中,fg为气相摩擦系数;x为质量含气率,x=Gg/(Gg+Gl);Gg为气相质量流量,kg/s;Gl为液相质量流量,kg/s;ρg为气相密度,kg/m3;Dh为窄缝通道水力直径,m。
两相摩擦压降ϕl2采用Chisholm C模型计算[24],关系式如下:
ϕl2=1+CX+1X2
X的计算式如下:
X=dpdll/dpdlg=1-xx0.5ρgρl0.5μgμl0.5
式中,ρl为液相密度;μg,μl分别为气相黏度和液相黏度。
参数C受微小通道尺寸效应的影响。对于窄缝通道而言,通道高度是尺寸效应的重要影响因素。将通道高度h作为修正系数,拟合得出符合本试验的经验关联式:
C=φhRe-0.221We-0.283
φh=118.96-961.71 000h+2.83×10-7h2-1.98×10-12h3
式中,Re为气-液两相流体混合雷诺数;We为气-液两相流体混合韦伯数。
修正后的关联式与试验值的对比如图8所示。图中横坐标为试验值,纵坐标为修正后的关联式的预测值,图中的点越靠近中间虚线,预测值与试验值越接近,图中点在中间虚线以上,预测值大于试验值,反之则小于试验值。相较于现有的关联式,新的关联式对试验数据拟合效果更好,在通道高度为0.01~0.08 mm范围内,大部分数据的预测值误差在25%以内,此误差在合理的范围内。
(1)随着气液相速度的增加,两相流压降也随之增加,其中液相速度对压降的影响明显大于气相速度对压降的影响。
(2)在相同气液相速度条件下,随着通道高度的增加,压降迅速降低。通道高度从0.03 mm增加到0.05 mm时,压降最大,分别为2.92,5.99,9.12 kPa;通道高度从0.05 mm增加到0.08 mm时,压降较小,分别为0.40,1.05,1.23 kPa。
(3)随着黏度的增加,气-液两相流流经窄缝通道的压降增大。当气相速度为0.83 m/s、液相速度为0.14 m/s,液相黏度分别为1 005,1 550,2 540 mPa·s时,压降分别为3.01,4.39,8.61 kPa;当气相速度为0.83 m/s、液相速度为0.28 m/s,液相黏度分别为1 005,1 550,2 540 mPa·s时,压降分别为5.81,7.80,15.5 kPa。
(4)对Chisholm参数C进行修正,将通道高度作为修正项,拟合得到新的关联式,能很好地预测窄缝通道高度在0.01~0.08 mm范围内时气-液两相流的压降,最大偏差不超过25%。

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doi: 10.3969/j.issn.1005-0329.2025.06.002
  • 接收时间:2024-10-04
  • 首发时间:2026-10-20
  • 出版时间:2025-06-30
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  • 收稿日期:2024-10-04
  • 修回日期:2025-03-25
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    1郑州轻工业大学 能源与动力工程学院,郑州 450002
    2河南省能源高效转化与利用国际联合实验室,郑州 450002

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张雪龄(1986),女,博士,副教授,主要从事多孔介质的流动换热、热储能等研究,通信地址:450002河南省郑州市高新区科学大道136号郑州轻工业大学能源与动力工程学院,E-mail:。
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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
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红菇属 Russula 17 8.13
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