Article(id=1320037547661709599, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037524588839497, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1005-0329.2026.02.004, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1755446400000, receivedDateStr=2025-08-18, revisedDate=1766678400000, revisedDateStr=2025-12-26, acceptedDate=null, acceptedDateStr=null, onlineDate=1792651076474, onlineDateStr=2026-10-22, pubDate=1772208000000, pubDateStr=2026-02-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792651076474, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792651076474, creator=13701087609, updateTime=1792651076474, updator=13701087609, issue=Issue{id=1320037524588839497, tenantId=1146029695717560320, journalId=1316781260334530699, year='2026', volume='54', issue='2', pageStart='1', pageEnd='118', issueExtLink='null', onlineDate='null', pubDate='1772208000000', pubDateStr='2026-02-28', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792651070972, creator='13701087609', updateTime=1792656210354, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1320059080773850045, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037524588839497, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1320059080773850046, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1320037524588839497, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=28, endPage=36, ext={EN=ArticleExt(id=1320037548009836832, articleId=1320037547661709599, tenantId=1146029695717560320, journalId=1316781260334530699, language=EN, title=Effect of rotational speed ratio on aerodynamic and structural performance of multiphase compressor, columnId=null, journalTitle=Fluid Machinery, columnName=null, runingTitle=null, highlight=null, articleAbstract=

To address the performance optimization and operational stability issues of multiphase compressors under variable operating conditions,a systematic study was conducted on a self‑developed multiphase contra‑rotating axial compressor through a combination of numerical simulation and experimental validation.The influence of different rotational speed ratios on compressor performance was analyzed,with evaluation metrics covering aerodynamic performance (polytropic efficiency,total pressure ratio) and structural performance (blade load distribution,vibration characteristics).The results indicate that when the rotational speed ratio (RSR) is below 0.77 or above 1.3,the compressor operation becomes unstable,and aerodynamic stall occurs in the contra‑rotating impeller.Within the optimal RSR range (0.77≤RSR≤1.3),optimizing the RSR can significantly improve compressor performance.Specifically,when RSR=0.91,the total pressure ratio reaches its maximum value of 1.181 4,which is 1.84% higher than that under the baseline condition (RSR=1).In terms of structural performance,appropriate adjustment of the RSR can effectively improve the blade stress state and suppress vibration.When RSR=1.1,the maximum amplitude of the outer rotor is reduced by 5.18×10-3 mm compared to that at RSR=1.Further analysis shows that increasing the rotational speed N1 of the forward‑rotating inner rotor can simultaneously optimize aerodynamic efficiency and blade stability,whereas increasing the rotational speed N2 of the contra‑rotating outer rotor may weaken the overall system stability.Reasonable selection of the rotational speed ratio is a key strategy for optimizing the comprehensive performance of multiphase compressors.The relevant conclusions can provide a theoretical basis and practical reference for the design and stable operation of similar compressors.

, authors=Yuan XI1, Xiaohui SONG2, Fuqiang CHEN1, 3, Weizheng AN2, Weimin WANG1, 3, Guangxin HOU2, Qiang MA2, authorsList=Yuan XI, Xiaohui SONG, Fuqiang CHEN, Weizheng AN, Weimin WANG, Guangxin HOU, Qiang MA, authorCompany=null, correspAuthors=Fuqiang CHEN, 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=1320037551763738935, articleId=1320037547661709599, tenantId=1146029695717560320, journalId=1316781260334530699, language=CN, title=转速比对多相混输压缩机气动及结构性能的影响, columnId=1317484287230853622, journalTitle=流体机械, columnName=设计计算, runingTitle=null, highlight=null, articleAbstract=

针对多相混输压缩机在变工况下性能优化与运行稳定性问题,通过数值仿真与试验验证相结合的方法,对自主研发的多相混输对转轴流压缩机展开系统研究,分析不同转速比对压缩机性能的影响规律,评估指标涵盖气动性能(多变效率、总压比)及结构性能(叶片载荷分布、振动特性)。结果表明,当转速比(RSR)低于0.77或高于1.3时,压缩机运行失稳,对转叶轮发生气动失速;而在适宜转速比区间(0.77≤RSR≤1.3)内,通过优化RSR可显著提升压缩机性能,其中当RSR=0.91时,总压比达到最大值1.181 4,较基准工况(RSR=1)提升1.84%。结构性能方面,适当调节RSR可有效改善叶片受力状态并抑制振动,当RSR=1.1时,外转子最大振幅较RSR=1时降低5.18×10-3 mm。进一步分析表明,提高正转内转子转速N1可同步优化气动效率与叶片稳定性,而提高对转外转子转速N2则可能削弱整机稳定性。合理选择转速比是优化多相混输压缩机综合性能的关键策略,相关结论可为同类压缩机的设计与稳定运行提供理论依据与实践参考。

, authors=奚源1, 宋晓辉2, 陈富强1, 3, 安维峥2, 王维民1, 3, 侯广信2, 马强2, authorsList=奚源, 宋晓辉, 陈富强, 安维峥, 王维民, 侯广信, 马强, authorCompany=null, correspAuthors=陈富强, authorNote=

奚源(2001),男,硕士研究生,主要从事多相混输压缩机气动设计研究,E-mail:。

, correspAuthorsNote=
陈富强(1990),男,博士,副教授,主要从事压缩机气动设计及内流机制研究工作,通信地址:100029北京市朝阳区北三环东路15号北京化工大学高端机械装备健康监控与自愈化北京市重点实验室,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=i22gpggJ0Kyt9mXDr4vF2A==, magXml=ewNkHGeSCbPMYdFN/fh1jA==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=Nu3cFo6/y9TAnhAsUs9VbQ==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=311Ko/nNjZL/r5gLsYqr8w==, mapNumber=null, fund=null)}, authors=[Author(id=1320037552288026946, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037547661709599, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=xyhlhd2021@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1320037552367718724, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037547661709599, authorId=1320037552288026946, language=EN, stringName=Yuan XI, firstName=Yuan, middleName=null, lastName=XI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, address=1Beijing Key Laboratory of Health Monitoring and Self‑recovery for High‑end Mechanical Equipment,Beijing University of Chemical Technology,Beijing 100029,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1320037552439021893, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037547661709599, authorId=1320037552288026946, language=CN, stringName=奚源, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, address=1北京化工大学 高端机械装备健康监控与自愈化北京市重点实验室,北京 100029, bio={"content":"

奚源(2001),男,硕士研究生,主要从事多相混输压缩机气动设计研究,E-mail:。

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journalId=1316781260334530699, articleId=1320037547661709599, language=EN, label=Tab.1, caption=

Design conditions and parameters

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参数数值
设计水深/m1 500
入口总压/MPa2.5
入口总温/K275.2
设计流量/(m3⋅h-1)3 600
设计含气率/%99.5
每级转子(R1,R2,R3)叶片数17
设计转子转速/(r⋅min-1)4 500(R1,R2,R3)
), ArticleFig(id=1320037560148152711, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037547661709599, language=CN, label=表1, caption=

设计工况及参数

, figureFileSmall=null, figureFileBig=null, tableContent=
参数数值
设计水深/m1 500
入口总压/MPa2.5
入口总温/K275.2
设计流量/(m3⋅h-1)3 600
设计含气率/%99.5
每级转子(R1,R2,R3)叶片数17
设计转子转速/(r⋅min-1)4 500(R1,R2,R3)
), ArticleFig(id=1320037560278176136, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037547661709599, language=EN, label=Tab.2, caption=

Comparison of simulation and experimental results

, figureFileSmall=null, figureFileBig=null, tableContent=
含液量/%仿真压比试验压比误差/%
0.51.1621.1302.83
0.11.1511.1262.22
1.01.1651.1322.92
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仿真与试验结果对比

, figureFileSmall=null, figureFileBig=null, tableContent=
含液量/%仿真压比试验压比误差/%
0.51.1621.1302.83
0.11.1511.1262.22
1.01.1651.1322.92
), ArticleFig(id=1320037560999596426, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037547661709599, language=EN, label=Tab.3, caption=

Maximum blade stress and amplitude underdifferent RSR

, figureFileSmall=null, figureFileBig=null, tableContent=
项目转子频率/Hz最大应力/MPa最大振幅/mm
方案8
(RSR=0.91)
内转子16 6000.298.49×10-4
外转子16 4001.992.25×10-3
方案0
(RSR=1)
内转子16 5800.288.29×10-4
外转子16 4206.237.15×10-3
方案3
(RSR=1.1)
内转子16 6000.38.76×10-4
外转子16 4001.71.92×10-3
), ArticleFig(id=1320037561133814155, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1320037547661709599, language=CN, label=表3, caption=

不同RSR下叶片最大应力和振幅

, figureFileSmall=null, figureFileBig=null, tableContent=
项目转子频率/Hz最大应力/MPa最大振幅/mm
方案8
(RSR=0.91)
内转子16 6000.298.49×10-4
外转子16 4001.992.25×10-3
方案0
(RSR=1)
内转子16 5800.288.29×10-4
外转子16 4206.237.15×10-3
方案3
(RSR=1.1)
内转子16 6000.38.76×10-4
外转子16 4001.71.92×10-3
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转速比对多相混输压缩机气动及结构性能的影响
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奚源 1 , 宋晓辉 2 , 陈富强 1, 3 , 安维峥 2 , 王维民 1, 3 , 侯广信 2 , 马强 2
流体机械 | 设计计算 2026,54(2): 28-36
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流体机械 |设计计算 2026 , 54 (2) : 28 -36
转速比对多相混输压缩机气动及结构性能的影响
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奚源1 , 宋晓辉2, 陈富强1, 3 , 安维峥2, 王维民1, 3, 侯广信2, 马强2
作者信息
  • 1北京化工大学 高端机械装备健康监控与自愈化北京市重点实验室,北京 100029
  • 2中海油研究总院有限责任公司,北京 100028
  • 3北京化工大学 高端压缩机及系统技术全国重点实验室,北京 100029
通讯作者:
陈富强(1990),男,博士,副教授,主要从事压缩机气动设计及内流机制研究工作,通信地址:100029北京市朝阳区北三环东路15号北京化工大学高端机械装备健康监控与自愈化北京市重点实验室,E-mail:。
作者简介:

奚源(2001),男,硕士研究生,主要从事多相混输压缩机气动设计研究,E-mail:。

Effect of rotational speed ratio on aerodynamic and structural performance of multiphase compressor
Yuan XI1 , Xiaohui SONG2, Fuqiang CHEN1, 3 , Weizheng AN2, Weimin WANG1, 3, Guangxin HOU2, Qiang MA2
Affiliations
  • 1Beijing Key Laboratory of Health Monitoring and Self‑recovery for High‑end Mechanical Equipment,Beijing University of Chemical Technology,Beijing 100029,China
  • 2CNOOC Research Institute Co.,Ltd.,Beijing 100028,China
  • 3State Key Laboratory of High‑end Compressor and System Technology,Beijing University of Chemical Technology,Beijing 100029,China
出版时间: 2026-02-28 doi: 10.3969/j.issn.1005-0329.2026.02.004
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针对多相混输压缩机在变工况下性能优化与运行稳定性问题,通过数值仿真与试验验证相结合的方法,对自主研发的多相混输对转轴流压缩机展开系统研究,分析不同转速比对压缩机性能的影响规律,评估指标涵盖气动性能(多变效率、总压比)及结构性能(叶片载荷分布、振动特性)。结果表明,当转速比(RSR)低于0.77或高于1.3时,压缩机运行失稳,对转叶轮发生气动失速;而在适宜转速比区间(0.77≤RSR≤1.3)内,通过优化RSR可显著提升压缩机性能,其中当RSR=0.91时,总压比达到最大值1.181 4,较基准工况(RSR=1)提升1.84%。结构性能方面,适当调节RSR可有效改善叶片受力状态并抑制振动,当RSR=1.1时,外转子最大振幅较RSR=1时降低5.18×10-3 mm。进一步分析表明,提高正转内转子转速N1可同步优化气动效率与叶片稳定性,而提高对转外转子转速N2则可能削弱整机稳定性。合理选择转速比是优化多相混输压缩机综合性能的关键策略,相关结论可为同类压缩机的设计与稳定运行提供理论依据与实践参考。

压缩机  /  多相混输  /  转速比  /  性能参数  /  稳定性

To address the performance optimization and operational stability issues of multiphase compressors under variable operating conditions,a systematic study was conducted on a self‑developed multiphase contra‑rotating axial compressor through a combination of numerical simulation and experimental validation.The influence of different rotational speed ratios on compressor performance was analyzed,with evaluation metrics covering aerodynamic performance (polytropic efficiency,total pressure ratio) and structural performance (blade load distribution,vibration characteristics).The results indicate that when the rotational speed ratio (RSR) is below 0.77 or above 1.3,the compressor operation becomes unstable,and aerodynamic stall occurs in the contra‑rotating impeller.Within the optimal RSR range (0.77≤RSR≤1.3),optimizing the RSR can significantly improve compressor performance.Specifically,when RSR=0.91,the total pressure ratio reaches its maximum value of 1.181 4,which is 1.84% higher than that under the baseline condition (RSR=1).In terms of structural performance,appropriate adjustment of the RSR can effectively improve the blade stress state and suppress vibration.When RSR=1.1,the maximum amplitude of the outer rotor is reduced by 5.18×10-3 mm compared to that at RSR=1.Further analysis shows that increasing the rotational speed N1 of the forward‑rotating inner rotor can simultaneously optimize aerodynamic efficiency and blade stability,whereas increasing the rotational speed N2 of the contra‑rotating outer rotor may weaken the overall system stability.Reasonable selection of the rotational speed ratio is a key strategy for optimizing the comprehensive performance of multiphase compressors.The relevant conclusions can provide a theoretical basis and practical reference for the design and stable operation of similar compressors.

compressor  /  multiphase flow  /  rotational speed ratio  /  performance parameters  /  stability
奚源, 宋晓辉, 陈富强, 安维峥, 王维民, 侯广信, 马强. 转速比对多相混输压缩机气动及结构性能的影响. 流体机械, 2026 , 54 (2) : 28 -36 . DOI: 10.3969/j.issn.1005-0329.2026.02.004
Yuan XI, Xiaohui SONG, Fuqiang CHEN, Weizheng AN, Weimin WANG, Guangxin HOU, Qiang MA. Effect of rotational speed ratio on aerodynamic and structural performance of multiphase compressor[J]. Fluid Machinery, 2026 , 54 (2) : 28 -36 . DOI: 10.3969/j.issn.1005-0329.2026.02.004
伴随全球油气资源需求的持续增长,勘探活动已逐步由浅海转向深海区域。然而,在深水油气田开发中后期,油藏压力自然递减,仅依靠井口压力难以维持正常外输,亟需配置水下增压设备(如深海压缩机)维持正常生产。20世纪90年代,Aker Solution,MAN,GE等国际企业及科研机构相继开展水下压缩机研发工作[1-3]。直到2015年,Aker Solution公司研发的水下离心压缩机在Asgard油气田成功投运,并保持长期稳定运行,首次验证了深海增压技术的工程可靠性[4-5];Onesubsea公司开发的WGC4000水下轴流式压缩机在Gullfaks项目实现商业化应用[6],该机型采用创新的对转结构设计,以反向旋转的动叶取代传统轴流压缩机的静叶,通过气动耦合实现级间能量传递,其优势在于减少压缩机级数从而降低设备尺寸,并在低转速工况下实现高压比输出。截至目前,Onesubsea公司仍是全球唯一掌握对转式水下压缩机核心技术并拥有成功工程案例的企业。
对转压缩机作为新型叶轮机械,目前在陆基与空天领域已形成较完善的研究体系。该技术最早可追溯至20世纪40年代,Taylor等首次将对转结构应用于飞机螺旋桨设计,通过在单级轴流风扇中采用对转布局,实现了显著提升压升与通流能力的突破[7]。此后,虽陆续出现对转压缩机、轴流泵等衍生研究,但受限于当时技术条件,相关研究存在明显局限性。21世纪以来,对转压缩机研究进入系统化阶段。KERREBROCK等[8]研制出两级吸气式对转风扇,其绝热效率达89%、压比达2.9,创下当时同类设备性能纪录;王掩刚等[9]建成国内首台双排对转压气机实验台,杨艳[10]基于该平台开展的数值研究表明,转速比对气动性能与结构动力学特性具有决定性影响;赵庆军等[11]指出,对转压气机研究的核心在于建立高效的叶型基元级设计理论,并发展三维流动控制方法。上述研究对解决边界层分离和叶顶泄漏等固有难题至关重要。需特别指出,对转结构虽能提升功率密度,但转子间动态干涉效应会导致流动失稳,这一矛盾成为制约该技术发展的关键。针对稳定性问题,郭彦超等[12-13]开展了创新性机匣处理研究,对比试验表明,自循环机匣处理(SRCT)与轴向槽处理(ASCT)能有效抑制叶顶泄漏流,并通过削弱压力势流降低动-动干涉强度,使失速裕度提升15%以上,该研究为对转压气机的工程应用提供了重要解决方案。
对转压缩机的核心特征在于其双转子系统以特定转速比(RSR,定义为两转子转速之比)协同工作,该参数是决定压气机气动与结构性能的关键因素。早在1988年,SHARMA等[14-15]通过试验首次证实转速比(0.666/1/1.5)会显著影响级压比和失速裕度;1994年,PUNDHIR[16]在研究中指出,转子间的轴向间隙和转速比对对转压缩机的稳定性有重要影响,并提出通过机匣处理对压缩机进行扩稳。刘波等[17]通过双排对转实验台,系统研究了RSR对压气机效率、压比及流量稳定性的非线性影响规律,揭示了“效率-稳定性”的权衡特性;CHEN等[18]结合PIV与数值模拟,首次捕捉到RSR变化导致的出口导叶涡系拓扑结构演变;侯为民等[19]通过多参数优化试验,证实存在使压气机工作在最佳工况点的最优RSR。
基于上述研究,本文针对深海作业的特殊需求,以自主设计的对转轴流压缩机为研究对象,通过高精度数值模拟,重点研究多相流工况下(气体体积分数GVF≥99.5%),RSR对压缩机气动及结构性能的影响机制。研究成果不仅为深海压缩机设计提供理论支撑,其揭示的“转速比-流动稳定性-结构响应”耦合规律,对发展气液混输装备具有普适指导价值。
研究对象为北京化工大学与中海油联合研制的水下对转轴流式压缩机,其采用反向旋转的双转子系统替代传统轴流压缩机的静子结构,其中正转叶片集成于内轴转子,反转叶片安装于外轴转子,两转子分别由独立电机驱动,可实现RSR的主动调节。该研究聚焦于压缩机前1.5级对转叶轮系统(包含第一级正转转子及其下游反转转子),其结构如图1所示。设计工况及设计参数如表1所示,主要气相介质为甲烷。
气液两相的数值仿真和分析方法需要引入气液输运的设置,计算使用欧拉-拉格朗日法,包括设置连续相(气相)和离散相(液相)的热传递模型,以及离散相粒子的直径、数目、进入入口的速度,再通过设置粒子质量流量来确定其含量,而后对两相设置表面张力,并引入CAB液滴破碎模型,粒子耦合方式选择完全耦合。
完成气液输运方法的设置后,再进行定常流场和非定常流场分析,研究压缩机气动性能和结构性能。完整的气液混输研究流程如图2所示。
使用TurboGrid软件对1.5级对转叶轮系统的双通道计算域进行网格划分。内转子叶片网格设置叶顶间隙为叶高的0.99.5%(靠近机匣处),相应的外转子叶片叶顶间隙需设置为叶高的0.5%(靠近轮毂处)。通过自动网格拓扑方法进行结构化网格划分,网格大小方法选择目标通道网格尺寸(target passage mesh size),边界层细化控制方法选择首层网格高度(first element offset),选择Y+值评价方法,雷诺数Re设为1.0×106,保证Y+<5。流道中设置叶片沿展向分布参数,方法选择网格数量与尺寸(element count and size),通过设置网格数量和固定网格数量来调节近壁面的网格尺寸,同时关注近壁面Y+值。轮毂间隙和机匣间隙的网格参数设置方法选择匹配叶尖网格膨胀(match expansion at blade tip),控制膨胀率<1.3。出入口段网格类型选择H型网格(H-grid),网格延展率<1.2。仅保留第一级转子叶片R1的入口段和第三级转子叶片R3的出口段,取消第二级叶片R2的出入口段,生成网格模型如图3所示。
采用Ansys CFX软件进行三维瞬态数值模拟。计算设置如下:湍流模型选择k‑ω SST模型(剪切应力输运模型),工质设置为甲烷气体和水滴,其中甲烷为连续相,水滴为离散相。本文的湿气工况可参考吸雨工况,根据Kissel在研究吸雨工况下压气机性能的工作中所统计的暴雨的数据可知,大气中雨滴粒径分布在0.2~3 mm之间[20],故将水滴直径设置为0.2 mm,粒子耦合选择完全耦合方式。水滴表面张力设置为0.072 8 N/m,破碎模型选择CAB模型,临界韦伯数Wec设为10。
边界条件设置:入口设为压力入口,入口总压25 bar,入口温度275.2 K。在入口边界中设置液滴行径,水滴进入的速度为40 m/s,粒子位置选择均匀入射(uniform injection),追踪粒子数目设为10 000,粒子温度为275.2 K。出口边界选择流量出口,出口质量流量为全通道17.52 kg/s。根据GVF=99.5%,换算粒子质量流量为全通道5 kg/s。计算三级压缩机双通道模型,则设置粒子质量流量为0.588 kg/s。考虑到水滴对叶片表面有侵蚀作用,叶片壁面设置侵蚀模型(erosion model),设为侵蚀壁面,选择Tabakoff模型。按以上设置对1.5级对转压缩机双通道模型进行稳态求解。
进行瞬态计算时,采用单向弱流固耦合。计算定常流体域,获得稳态流动初始数据。而后计算固体域,固体域仅施加离心载荷和固定支撑,获得叶片模态振动数据文件。将模态振动数据文件映射到叶片表面,而后进行非定常计算。叶片最大振幅设置为0.001 m,叶片流体域网格运动设置为预设的叶片模态振动方式。对转叶轮转子的网格交界面设置为冻结转子(frozen rotor)。其他设置参数保持不变。瞬态时间周期为一阶模态频率的倒数。
为确保计算精度和计算成本协调,避免计算过于庞大的网格数量或网格数量过少导致精度不足,因此进行网格无关性验证。保持求解设置不变,稳态计算求解三级双通道网格数为200万,250万,300万,350万,400万,500万,600万,700万的计算模型,分别计算其多变效率和总压比,结果如图4所示。
在结果随网格数变化趋于稳定后,计算所得值分别为多变效率82.57%和总压比1.162。网格数为350万时,多变效率为82.46%,总压比为1.16,二者与稳定后的误差分别仅为0.133%和0.172%,均小于0.5%。因此,三级双通道350万网格数目满足精度要求。
在试验台上(见图5)进行喷水压缩试验,验证数值仿真可靠性。进气入口布置水泵及调节阀,实现含液量实时控制。在测试入口段及出口段处布置压力表(图5中平面1和平面2位置处),测定流体增压前后的压力,获取压比。试验测试不同含液量下的增压性能,结果如表2所示。研究发现,在含液量为0.5%时,试验与仿真得到的压比误差仅为2.83%;而含液量在0.1%~1.0%区间变化时,误差峰值也仅为2.92%,仿真计算与试验结果吻合良好,证实了数值方法的精确性。
通过改变第一、三级内轴转子叶片的转速N1和第二级外轴转子叶片的转速N2,探究不同转速比(RSR,RSR=N1/N2)下的压缩机在GVF=99.5%时的多变效率和总压比的差异及变化规律。原设计点方案(方案0)用于计算压缩机初始性能结果,其转速均为4 500 r/min,转向相反,则RSR=1。然后,进行了方案1~10共10组对比试验,其中,方案1~5相较于设计点保持N2不变,仅改变N1,测试了RSR的区间为[0.8,1.5];方案6~10则相较于设计点保持N1不变,仅改变N2,N2的取值与前5种方案N1的取值对应相等,测试RSR的区间为[0.67,1.25]。
图6示出11种方案在GVF=99.5%时额定流量工况下的多变效率和总压比计算结果对比。当RSR>1.3或RSR<0.77时,计算所得的多变效率和总压比随时间产生大幅度波动,表明RSR处于该范围的对转转子气动失稳;当0.8≤RSR≤1.25时,多变效率和总压比均呈现出关于RSR=1轴对称的分布形式,其中,多变效率-RSR曲线呈二次函数形式。曲线轴对称的分布表明,仅调整N2的方案与仅调整N1的方案对比,只要二者对应的转速相同,产生总压比和多变效率的结果是近似的。当RSR=1时,多变效率达到最低值,为82.46%;当RSR=0.91时,总压比达到最大值,为1.181 4,较RSR=1时提升了1.84%。
通过分析叶片气动力大小、激励频率,以及气动阻尼,以此反映叶片的气动稳定性。图7示出了不同RSR下的各级叶片受力时域曲线。
内外轴转子的受力方向相反。第一级内转子R1受到的气动力最小,规律性和周期性最强,受力变化基本呈正弦曲线。第二级叶片R2作为外转子,其受气动力周期性较差,原因是R2同时承受前后排动叶的干涉作用和自身的气流激励作用。同时,随着RSR数值偏离1的程度越大,即转速差越大,叶片受到的干涉和气流激励作用更为复杂。RSR数值偏离1超过某一范围时,叶片极有可能发生失稳现象,这也是方案1、方案2、方案6、方案7,即RSR>1.3或RSR<0.77时,压缩机性能计算结果失稳的重要原因。
图8示出不同RSR下各级叶片受到气动力的均值对比结果。可以看出,各级叶片受力均值的分布规律相同。只对其中一级叶片分析,受力均值-RSR关系规律与多变效率-RSR分布规律相似,关于RSR=1呈轴对称分布。方案3(RSR=1.1)和方案8(RSR=0.91)受到的气动力的均值最大且近似相等。
对叶片受到的气动力进行了傅里叶变换,并进行频域分析,以此定量衡量叶片受到气流激励的频率,如图9所示。内转子R1和R3的激励主频相接近,低频段主要集中在500 Hz以下,高频段主要集中在10 000 Hz附近。外转子R2在低频段的激励频率和内转子相近,但在高频段,R2的激励主频主要集中在10 808 Hz附近,比内转子更高。
从图9可以看出,当N2不变,仅增大N1的过程中,叶片受到的低频激励频率逐渐增多,激振力幅值增大;而在高频段,叶片受到的气流激励的频率不变,但幅值不断减小。当N1不变,N2增大的过程中,叶片在低频和高频受到的气流激励的幅值均增大,且在低频段产生更多的杂频,能量更不集中。
对比了不同RSR下的气动阻尼比(见图10),用于定量描述叶片的气动稳定性。总的来看,R1的气动阻尼比最高,其次是R2,而R3的气动阻尼比最小。叶片气动阻尼比-RSR的分布规律大致为RSR=1呈轴对称分布,这与受力均值-RSR及多变效率-RSR分布规律均相似。气动阻尼比越大,对叶片振动的抑制能力越强。从图10可以看出,RSR=1.1时(方案3)的气动稳定性最佳。
通过预设气动力和离心载荷等预应力,以尽可能模拟叶片真实工况,从而获得更准确的模态信息,再对内外转子分别进行谐响应分析,确定叶片工作的危险点。对内外转子分别施加气动力、旋转速度、固定支撑进行预应力下的模态求解,获得内外转子的坎贝尔图,如图11所示。根据图11,由于该叶片属于高展弦比、高叶厚的叶片,因此,内外转子的固有频率均较高。内转子的第一阶固有频率在额定转速下为10 101 Hz,叶片模态为弯曲模态(BW)。外转子的第一阶固有频率在额定转速下为9 598.8 Hz,叶片模态也为弯曲模态(BW)。将方案0、方案3、方案8(RSR=1,1.1,0.91)的对转叶轮受到的气流激励主要频率添加到图11中,气流激励频率分别集中在500 Hz以下和10 000 Hz附近,在10 000 Hz附近的气流激励频率接近叶片的一阶固有频率,内外转子的一阶模态为危险模态,需要进行谐响应分析。
在预应力模态结果的基础上,对3个方案的内外转子分别施加靠近危险模态下不同大小的激振力,并对其进行谐响应分析,得到最大应力和振幅,结果见表3。3个方案的最大应力和振幅均出现在设计点方案(RSR=1)中的外转子R2上,最大应力和振幅分别为6.23 MPa和7.15×10-3 mm。该最大应力远小于材料的屈服强度,最大振幅也远小于叶片弦长,因此,叶片处于稳定状态。通过调节RSR,可以明显地降低叶片的最大动应力和振幅,增强叶片的稳定性。其中,方案3(RSR=1.1)通过增大内转子转速,提高内转子的做功能力,同时使得内转子最大振幅相较于设计点方案(RSR=1)提高了0.47×10-3 mm,提升幅度约5.7%;但使得外转子的最大振幅降低了5.23×10-3 mm,降低约73.1%。方案8(RSR=0.91)调节外转子转速,同样使得内转子振幅提高,外转子振幅降低,但抑制振动的效果相较于方案3(RSR=1.1)较低。显然,方案3(RSR=1.1)对抑制叶片振动和增强稳定性的效果最佳。
(1)对转叶轮的转子转速差不宜过大,当RSR<0.77或RSR>1.3时,对转叶轮气动失稳。不同RSR方案中,压缩机多变效率-RSR和总压比-RSR关于RSR=1轴对称分布。RSR=0.91和RSR=1.1时,对转叶轮都拥有较好的多变效率和总压比性能。
(2)适当提高内转子的转速N1可以降低叶片之间的流动损耗,使得内外转子之间的做功能力分配更加均匀,提高叶片的稳定性。在文中计算的RSR方案中,RSR=1.1时的叶片稳定性更好,压缩机级间做功分配更合理。
(3)RSR=0.91和RSR=1.1时的最大响应频率相同。叶片的最大振幅和最大应力出现在外转子上,且RSR=1时的最大振幅和应力最大。适当调节转速差可以有效抑制叶片振动,提高叶片的稳定性。其中,RSR=1.1时,通过增大内转子的转速,提高了内转子的做功能力。同时,内转子的最大振幅相较于RSR=1时提高了0.47×10-3 mm,提升幅度约5.7%;外转子的最大振幅降低了5.23×10-3 mm。
本文的研究成果不仅为深海压缩机的研发奠定了理论基础,所阐明的“转速比-流动稳定性-结构响应”耦合机制,对广义气液混输装备的设计与发展同样具有重要的普适性借鉴意义。

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doi: 10.3969/j.issn.1005-0329.2026.02.004
  • 接收时间:2025-08-18
  • 首发时间:2026-10-22
  • 出版时间:2026-02-28
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  • 收稿日期:2025-08-18
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    1北京化工大学 高端机械装备健康监控与自愈化北京市重点实验室,北京 100029
    2中海油研究总院有限责任公司,北京 100028
    3北京化工大学 高端压缩机及系统技术全国重点实验室,北京 100029

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陈富强(1990),男,博士,副教授,主要从事压缩机气动设计及内流机制研究工作,通信地址:100029北京市朝阳区北三环东路15号北京化工大学高端机械装备健康监控与自愈化北京市重点实验室,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
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