Article(id=1243879756706460661, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243879752042398333, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1007-7294.2024.08.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1706889600000, receivedDateStr=2024-02-03, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1774493644167, onlineDateStr=2026-03-26, pubDate=1724083200000, pubDateStr=2024-08-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774493644167, onlineIssueDateStr=2026-03-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774493644167, creator=13701087609, updateTime=1774493644167, updator=13701087609, issue=Issue{id=1243879752042398333, tenantId=1146029695717560320, journalId=1240685776644648972, year='2024', volume='28', issue='8', pageStart='1133', pageEnd='1296', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1774493643055, creator=13701087609, updateTime=1774493947997, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1243881031133147325, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243879752042398333, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1243881031133147326, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243879752042398333, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1187, endPage=1199, ext={EN=ArticleExt(id=1243879757457241088, articleId=1243879756706460661, tenantId=1146029695717560320, journalId=1240685776644648972, language=EN, title=Numerical prediction of wake field for a four-screw ship, columnId=1241023037940748650, journalTitle=Journal of Ship Mechanics, columnName=Hydrodynamics, runingTitle=null, highlight=null, articleAbstract=
The complexity of the stern appendage of a four-screw ship and the differences in the spatial layout of the internal and external propellers will lead to the unbalanced load distribution of the internal and external propellers. Based on the CFD method, numerical prediction simulation for the viscous wake field of a ship with four propellers was carried out. According to wake field distribution and turbulence characteristics, the difference in wake fields between the inner and outer propellers was compared and analyzed, and also the results was contrasted with the test values. The study results show that the inner propeller in the turbulence zone is affected by the hull boundary layer, which makes the axial velocity at the inner propeller disk less than that at the outer propeller disk, resulting in uneven load distribution between the inner and outer propellers. The flow at the outer propeller is a mixed one of the hull boundary layer and the turbulent wake, which makes the wake at the outer propeller disk more uneven. The research can provide basis and support for four-screw ship design and stern layout optimization.
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四桨船尾部附体的复杂性及内外桨空间布置位置的差异性会导致内外桨载荷分配不均衡。针对上述问题,本文采用CFD方法对四桨船舶的粘性尾流场进行数值模拟研究,从船体周围流场分布、湍流特性等方面详细分析内外桨盘面伴流场差异产生的原因,并与试验结果进行对比分析。研究结果表明,内桨处于船尾湍流区中,受船体边界层影响更甚,这使得内桨桨盘面轴向速度小于外桨盘面,进而导致内外桨负荷分配不均匀;外桨盘面流动为船体边界层流动及湍流尾流区的混合流动,这使得外桨伴流场更不均匀。上述研究可为四桨船舶设计及尾部布局优化提供基础和支撑。
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2.College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1243879769297760754, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, authorId=1243879769071268327, language=CN, stringName=梁宁, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2011. (in Chinese), articleTitle=Research of design method for highly skewed propeller, refAbstract=null)], funds=[Fund(id=1243879776377746144, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, awardId=520RC543, language=CN, fundingSource=海南省自然科学基金高层次人才项目(520RC543), fundOrder=null, country=null), Fund(id=1243879776474215138, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, awardId=51709040, language=CN, fundingSource=国家自然科学基金青年基金资助项目(51709040), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1243879768060441014, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, xref=1., ext=[AuthorCompanyExt(id=1243879768068829623, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, companyId=1243879768060441014, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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Calculation model, figureFileSmall=M4hDrkqHL5k0m0C/MA/6Gw==, figureFileBig=Yr7NkrDwqf1mDy433xA8dA==, tableContent=null), ArticleFig(id=1243879770845458995, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图1, caption=
计算模型, figureFileSmall=M4hDrkqHL5k0m0C/MA/6Gw==, figureFileBig=Yr7NkrDwqf1mDy433xA8dA==, tableContent=null), ArticleFig(id=1243879771143254592, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.2, caption=
Computational domain and boundary conditions, figureFileSmall=rvOovCH7cckrDeYcU+LZew==, figureFileBig=od2M8jcW9v4TEB+nlLjhkw==, tableContent=null), ArticleFig(id=1243879771256500806, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图2, caption=
计算域及边界条件设置, figureFileSmall=rvOovCH7cckrDeYcU+LZew==, figureFileBig=od2M8jcW9v4TEB+nlLjhkw==, tableContent=null), ArticleFig(id=1243879771365552717, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.3, caption=
Computational grid for the four-screw ship, figureFileSmall=jKyrwD1aE3IxrAn/xyeJfA==, figureFileBig=Xw26GTFNynGf8SZbIvE2hQ==, tableContent=null), ArticleFig(id=1243879771453633103, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图3, caption=
四桨船数值计算网格, figureFileSmall=jKyrwD1aE3IxrAn/xyeJfA==, figureFileBig=Xw26GTFNynGf8SZbIvE2hQ==, tableContent=null), ArticleFig(id=1243879771562685009, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.4, caption=
Computation results with three meshing(corse/medium/fine) at r/R=0.7, figureFileSmall=X2w60CBd5uQfXRO+QrTN2A==, figureFileBig=/fsWZ9bUBMW0YC+jBgssbQ==, tableContent=null), ArticleFig(id=1243879771667542613, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图4, caption=
r/R=7处三套网格计算结果, figureFileSmall=X2w60CBd5uQfXRO+QrTN2A==, figureFileBig=/fsWZ9bUBMW0YC+jBgssbQ==, tableContent=null), ArticleFig(id=1243879771780788828, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.5, caption=
Comparison of velocity contour in propeller disc between CFD and PIV results, figureFileSmall=5jPTXSkI0u8z4YfxZVM+6g==, figureFileBig=G3k24hu5Mq+FitWNbdaeYw==, tableContent=null), ArticleFig(id=1243879771885646429, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图5, caption=
内桨盘面速度云图计算结果与试验结果对比, figureFileSmall=5jPTXSkI0u8z4YfxZVM+6g==, figureFileBig=G3k24hu5Mq+FitWNbdaeYw==, tableContent=null), ArticleFig(id=1243879771982115426, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.6, caption=
Comparison of circumferential wake distributions (in peopeller disc at 0.7R) between CFD and PIV results, figureFileSmall=1DLvqewmxJ1Vr4y/iEjQ7Q==, figureFileBig=rOc038q0jICAjw/rc5RD8w==, tableContent=null), ArticleFig(id=1243879772112138855, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图6, caption=
内桨盘面速度0.7R处周向分布, figureFileSmall=1DLvqewmxJ1Vr4y/iEjQ7Q==, figureFileBig=rOc038q0jICAjw/rc5RD8w==, tableContent=null), ArticleFig(id=1243879772212802156, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.7, caption=
Definition of local coordinate system and angle, figureFileSmall=ZUcoeBfMBzbN6S80PLYCrQ==, figureFileBig=M/EpLRGrxZbQJf+MuH9kjg==, tableContent=null), ArticleFig(id=1243879772305076848, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图7, caption=
局部坐标系及角度定义, figureFileSmall=ZUcoeBfMBzbN6S80PLYCrQ==, figureFileBig=M/EpLRGrxZbQJf+MuH9kjg==, tableContent=null), ArticleFig(id=1243879772393157236, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.8, caption=
Nondimensional axial velocity contours in propeller discs, figureFileSmall=klllMXPwgDy4iyLeIvP+mg==, figureFileBig=6ldr3oslZev0iJHiY3QW/w==, tableContent=null), ArticleFig(id=1243879772535763576, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图8, caption=
螺旋桨桨盘面无量纲轴向速度云图, figureFileSmall=klllMXPwgDy4iyLeIvP+mg==, figureFileBig=6ldr3oslZev0iJHiY3QW/w==, tableContent=null), ArticleFig(id=1243879772682564222, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.9, caption=
Several typical cross sections for velocity computation along X direction, figureFileSmall=0jG2tLhAVDwA5grazCa5kQ==, figureFileBig=9xepBYj1l9ko2Jalc4Ez1g==, tableContent=null), ArticleFig(id=1243879772779033218, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图9, caption=
沿X方向桨前横截面示意图, figureFileSmall=0jG2tLhAVDwA5grazCa5kQ==, figureFileBig=9xepBYj1l9ko2Jalc4Ez1g==, tableContent=null), ArticleFig(id=1243879772883890823, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.10, caption=
Velocity contours in typical cross sections along the X direction, figureFileSmall=t+MZ/K4T15WSQ7yllyW54g==, figureFileBig=NARta4TIaSKt3YAKWzzVAQ==, tableContent=null), ArticleFig(id=1243879772984554119, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图10, caption=
沿X方向横截面速度云图, figureFileSmall=t+MZ/K4T15WSQ7yllyW54g==, figureFileBig=NARta4TIaSKt3YAKWzzVAQ==, tableContent=null), ArticleFig(id=1243879773089411722, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.11, caption=
Velocity contour of the single-screw ship[19], figureFileSmall=7E4BOJjIPdxR4yTGIbBEEg==, figureFileBig=qaQ2oF3Eb8OurIt4wN+pDw==, tableContent=null), ArticleFig(id=1243879773206852238, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图11, caption=
单桨船船尾伴流场分布[19], figureFileSmall=7E4BOJjIPdxR4yTGIbBEEg==, figureFileBig=qaQ2oF3Eb8OurIt4wN+pDw==, tableContent=null), ArticleFig(id=1243879773294932625, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.12, caption=
Axial velocity contour in horizontal plane through propeller shaft, figureFileSmall=PkInmb6++17kkh+HpPUWTw==, figureFileBig=Mg37QIHiplETBRks4u7nzw==, tableContent=null), ArticleFig(id=1243879773429150358, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图12, caption=
穿过桨轴中心水平截面速度分布云图, figureFileSmall=PkInmb6++17kkh+HpPUWTw==, figureFileBig=Mg37QIHiplETBRks4u7nzw==, tableContent=null), ArticleFig(id=1243879773550785176, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.13, caption=
Viscous flow around the ship, figureFileSmall=KaOeo7yI8Pl7YdLyuAvvkQ==, figureFileBig=8PWs1gEUVvywsJctxErOgg==, tableContent=null), ArticleFig(id=1243879773668225692, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图13, caption=
船体周围粘性流动, figureFileSmall=KaOeo7yI8Pl7YdLyuAvvkQ==, figureFileBig=8PWs1gEUVvywsJctxErOgg==, tableContent=null), ArticleFig(id=1243879773798249119, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.14, caption=
Axial velocity contour in longitudinal plane through propeller shaft, figureFileSmall=Qhf1JN5OwATfBSa10oD/RA==, figureFileBig=/sa51SXCBXFTFyGhPEWObg==, tableContent=null), ArticleFig(id=1243879773919883938, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图14, caption=
穿过桨轴中心纵向截面速度分布云图, figureFileSmall=Qhf1JN5OwATfBSa10oD/RA==, figureFileBig=/sa51SXCBXFTFyGhPEWObg==, tableContent=null), ArticleFig(id=1243879774020547239, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.15, caption=
Circumferential distribution of nondimensional velocity on propeller disc, figureFileSmall=1eUNn7L9b9ng9OdlDJDh+Q==, figureFileBig=n+88LLQFUAt3M/RLnJ1BNQ==, tableContent=null), ArticleFig(id=1243879774117016233, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图15, caption=
桨盘面无量纲速度的周向分布规律, figureFileSmall=1eUNn7L9b9ng9OdlDJDh+Q==, figureFileBig=n+88LLQFUAt3M/RLnJ1BNQ==, tableContent=null), ArticleFig(id=1243879774226068138, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.16, caption=
Angle of brackets arm, figureFileSmall=bJqaWP6fJyVjAo/HGvUDjA==, figureFileBig=y53Ny/om8wTDsTVAF4itJQ==, tableContent=null), ArticleFig(id=1243879774347702959, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图16, caption=
支架臂角度, figureFileSmall=bJqaWP6fJyVjAo/HGvUDjA==, figureFileBig=y53Ny/om8wTDsTVAF4itJQ==, tableContent=null), ArticleFig(id=1243879774494503602, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.17, caption=
Diagram of stern vortexs shedding from shaft jacket, figureFileSmall=gtZIDeuG01b9Z9G8gKvw9A==, figureFileBig=etHBGwMOerdGFyyzJWBoPQ==, tableContent=null), ArticleFig(id=1243879774607749814, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图17, caption=
船尾涡脱落示意图, figureFileSmall=gtZIDeuG01b9Z9G8gKvw9A==, figureFileBig=etHBGwMOerdGFyyzJWBoPQ==, tableContent=null), ArticleFig(id=1243879774716801722, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.18, caption=
Streamline map of stern area, figureFileSmall=1BQvh4cl1Hdi1gVe/djhMg==, figureFileBig=US8mxdRFVmmmPJoNyokyaA==, tableContent=null), ArticleFig(id=1243879774855213756, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图18, caption=
船尾流线分布, figureFileSmall=1BQvh4cl1Hdi1gVe/djhMg==, figureFileBig=US8mxdRFVmmmPJoNyokyaA==, tableContent=null), ArticleFig(id=1243879774955877055, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.19, caption=
Vorticity contours on propeller disc, figureFileSmall=FmSHoiKNnG9LsjBxDsc6ZA==, figureFileBig=vLcnxLIbjVipx21UUJ4t8Q==, tableContent=null), ArticleFig(id=1243879775039763136, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图19, caption=
桨盘面涡强度分布, figureFileSmall=FmSHoiKNnG9LsjBxDsc6ZA==, figureFileBig=vLcnxLIbjVipx21UUJ4t8Q==, tableContent=null), ArticleFig(id=1243879775153009345, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.20, caption=
Harmonic components of axial velocity at different r/R of stern propeller, figureFileSmall=aop9NWHuvbf1C/nmWuuM1A==, figureFileBig=O39hQ/UZqBQZIautPlNMkg==, tableContent=null), ArticleFig(id=1243879775253672644, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图20, caption=
内外桨轴向速度的各阶谐调分量, figureFileSmall=aop9NWHuvbf1C/nmWuuM1A==, figureFileBig=O39hQ/UZqBQZIautPlNMkg==, tableContent=null), ArticleFig(id=1243879775345947335, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Fig.21, caption=
Comparison of harmonic components at r/R=0.7, figureFileSmall=XEek+0MjrLmgw+e+7ydXew==, figureFileBig=JJH6tpD15j8Wc0pOHh4uEQ==, tableContent=null), ArticleFig(id=1243879775454999242, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=图21, caption=
特征半径r/R=0.7谐调分量对比, figureFileSmall=XEek+0MjrLmgw+e+7ydXew==, figureFileBig=JJH6tpD15j8Wc0pOHh4uEQ==, tableContent=null), ArticleFig(id=1243879775534691021, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Tab.1, caption=
Main parameters of calculation model
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| 船 | 桨 |
|---|
| 船长LPP | 8.2 m | 半径 | 0.14 m |
| 吃水 | 0.29 m | 桨叶数 | 5 |
| 湿表面积 | 5.36 m2 | 毂径比 | 0.182 |
| 傅汝德数 | 0.28 | 螺距比 | 1.18 |
), ArticleFig(id=1243879775643742928, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=表1, caption=
模型主要参数
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| 船 | 桨 |
|---|
| 船长LPP | 8.2 m | 半径 | 0.14 m |
| 吃水 | 0.29 m | 桨叶数 | 5 |
| 湿表面积 | 5.36 m2 | 毂径比 | 0.182 |
| 傅汝德数 | 0.28 | 螺距比 | 1.18 |
), ArticleFig(id=1243879775736017619, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Tab.2, caption=
Mesh paraments
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| 粗网格(万) | 中网格(万) | 细网格(万) |
|---|
| 网格数量 | 223 | 657 | 838 |
| 面数量 | 135 | 153 | 250 |
| 点数量 | 223.4 | 535 | 868 |
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网格参数
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| 粗网格(万) | 中网格(万) | 细网格(万) |
|---|
| 网格数量 | 223 | 657 | 838 |
| 面数量 | 135 | 153 | 250 |
| 点数量 | 223.4 | 535 | 868 |
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Mesh quantity in different parts of model ship(Medium meshing)
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| 网格总数(万) | 占比(%) |
|---|
| 船体 | 39.7 | 6.05 |
| 桨轴 | 56.1 | 8.54 |
| 支架 | 65.9 | 10.03 |
| 舵 | 27.2 | 4.14 |
| 边界层 | 24.9 | 3.79 |
| 加密区 | 366 | 55.68 |
| 其他 | 77.3 | 11.77 |
| 总计 | 657 | 100 |
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网格分布细节
, figureFileSmall=null, figureFileBig=null, tableContent=
| 网格总数(万) | 占比(%) |
|---|
| 船体 | 39.7 | 6.05 |
| 桨轴 | 56.1 | 8.54 |
| 支架 | 65.9 | 10.03 |
| 舵 | 27.2 | 4.14 |
| 边界层 | 24.9 | 3.79 |
| 加密区 | 366 | 55.68 |
| 其他 | 77.3 | 11.77 |
| 总计 | 657 | 100 |
), ArticleFig(id=1243879776130282205, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=EN, label=Tab.4, caption=
Uncertainty parameters of the verification study
, figureFileSmall=null, figureFileBig=null, tableContent=
| r/R | 外桨 | 内桨 |
|---|
| RG | PG |  | RG | PG |  |
|---|
| 0.3 | 0.8121 | 0.6008 | 0.0568 | 0.7283 | 0.9152 | 0.1125 |
| 0.4 | 0.8212 | 0.5686 | 0.0125 | 0.8127 | 0.5987 | 0.0459 |
| 0.5 | 0.7835 | 0.7043 | 0.0689 | 0.8645 | 0.7752 | 0.0556 |
| 0.6 | 0.6890 | 1.0751 | 0.0467 | 0.7536 | 0.8166 | 0.0768 |
| 0.7 | 0.6436 | 1.2723 | 0.0143 | 0.8132 | 0.5969 | 0.1365 |
| 0.8 | 0.7517 | 0.8239 | 0.0371 | 0.6394 | 1.2910 | 0.0542 |
| 0.9 | 0.7169 | 0.9606 | 0.0462 | 0.8271 | 0.5480 | 0.0612 |
| 1.0 | 0.6908 | 1.0678 | 0.0685 | 0.6254 | 1.3549 | 0.0596 |
), ArticleFig(id=1243879776218362590, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879756706460661, language=CN, label=表4, caption=
数值计算不确定参数
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| r/R | 外桨 | 内桨 |
|---|
| RG | PG |  | RG | PG |  |
|---|
| 0.3 | 0.8121 | 0.6008 | 0.0568 | 0.7283 | 0.9152 | 0.1125 |
| 0.4 | 0.8212 | 0.5686 | 0.0125 | 0.8127 | 0.5987 | 0.0459 |
| 0.5 | 0.7835 | 0.7043 | 0.0689 | 0.8645 | 0.7752 | 0.0556 |
| 0.6 | 0.6890 | 1.0751 | 0.0467 | 0.7536 | 0.8166 | 0.0768 |
| 0.7 | 0.6436 | 1.2723 | 0.0143 | 0.8132 | 0.5969 | 0.1365 |
| 0.8 | 0.7517 | 0.8239 | 0.0371 | 0.6394 | 1.2910 | 0.0542 |
| 0.9 | 0.7169 | 0.9606 | 0.0462 | 0.8271 | 0.5480 | 0.0612 |
| 1.0 | 0.6908 | 1.0678 | 0.0685 | 0.6254 | 1.3549 | 0.0596 |
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