Article(id=1241408876097106722, tenantId=1146029695717560320, journalId=1227999626482147330, issueId=1241408875602178849, articleNumber=null, orderNo=null, doi=10.16579/j.issn.1001.9669.2025.08.015, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1746460800000, receivedDateStr=2025-05-06, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1773904540323, onlineDateStr=2026-03-19, pubDate=1755187200000, pubDateStr=2025-08-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773904540323, onlineIssueDateStr=2026-03-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773904540323, creator=13701087609, updateTime=1773904540323, updator=13701087609, issue=Issue{id=1241408875602178849, tenantId=1146029695717560320, journalId=1227999626482147330, year='2025', volume='47', issue='8', pageStart='1', pageEnd='174', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773904540204, creator=13701087609, updateTime=1773904658798, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241409373071798309, tenantId=1146029695717560320, journalId=1227999626482147330, issueId=1241408875602178849, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241409373071798310, tenantId=1146029695717560320, journalId=1227999626482147330, issueId=1241408875602178849, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=123, endPage=130, ext={EN=ArticleExt(id=1241408876424262435, articleId=1241408876097106722, tenantId=1146029695717560320, journalId=1227999626482147330, language=EN, title=Measurement and analysis of moment of inertia using torsional pendulum method with air damping consideration, columnId=1228282192162390694, journalTitle=Journal of Mechanical Strength, columnName=Experimental Research·Testing Technology, runingTitle=null, highlight=null, articleAbstract=
To address the issue of accuracy degradation caused by aerodynamic damping when measuring the moment of inertia of irregular specimens with large airfoil surfaces using the torsional pendulum method, a compensation approach based on drag simulation results was proposed. Initially, the mechanism of aerodynamic damping in torsional oscillations was analyzed, and a measurement model incorporating compensation through calculation of aerodynamic damping torque was established. Subsequently, the reduced frequency parameter was introduced to characterize the unsteady aerodynamic nature of the aerodynamic damping torque. By employing a quasi-steady assumption combined with equivalent linearization techniques,the unsteady time-varying aerodynamic damping torque was equivalently represented as viscous damping. Furthermore,computational fluid dynamics (CFD) simulations were conducted to obtain drag coefficients during specimen motion, from which a compensation formula based on drag coefficients was derived. Finally, validation test were designed and performed to verify the proposed method. The findings indicate that under low reduced frequency conditions (reduced frequency less than 0.01), the relative error between the equivalent aerodynamic damping ratio calculated via quasi-steady assumption and test separation values is approximately 7%. After compensating using the proposed equivalent aerodynamic damping ratio, the error between measured and theoretical moments of inertia is approximately 0.2%, demonstrating that the proposed method effectively enhances measurement accuracy for moments of inertia of irregular specimens with large airfoil surfaces.
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针对利用扭摆法测量具有较大翼面的异形体被测样件的转动惯量时,因空气阻尼导致精度下降的问题,提出了一种基于阻力仿真结果进行补偿的方法。首先,分析了扭摆运动中空气阻尼的作用机制,建立了通过计算空气阻尼力矩进行补偿的测量模型。其次,引入缩减频率表征空气阻尼力矩的非定常特性,采用准定常假设与等效线性化的方法,将非定常的时变空气阻尼力矩等效为黏性阻尼。再次,通过计算流体力学(Computational Fluid Dynamics, CFD)软件模拟并获取了被测样件运动过程中的阻力系数,推导了基于阻力系数的补偿计算式。最后,设计了验证性试验进行验证。结果表明,在低缩减频率(缩减频率小于0.01)工况条件下,基于准定常假设的等效空气阻尼比计算值与试验分离值的相对误差约为7%,使用所提等效空气阻尼比进行补偿后的转动惯量与理论转动惯量的误差约为0.2%,证明所提方法可有效提升异形体被测样件转动惯量的测量精度。
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马卫平,男,1976年生,河南郑州人,高级工程师;主要研究方向为机械振动故障诊断、动平衡技术、信号分析及机器状态监测等;E-mail:jxsmwp@163.com。
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马卫平,男,1976年生,河南郑州人,高级工程师;主要研究方向为机械振动故障诊断、动平衡技术、信号分析及机器状态监测等;E-mail:jxsmwp@163.com。
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马卫平,男,1976年生,河南郑州人,高级工程师;主要研究方向为机械振动故障诊断、动平衡技术、信号分析及机器状态监测等;E-mail:jxsmwp@163.com。
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Schematic diagram of the torsional pendulum method measurement device, figureFileSmall=x8fb8m5Hanx+H6sGVZrfyg==, figureFileBig=IQ6s42zZviZoAFI1I9FtWA==, tableContent=null), ArticleFig(id=1241451351616573636, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=图1, caption=
扭摆法测量装置示意图, figureFileSmall=x8fb8m5Hanx+H6sGVZrfyg==, figureFileBig=IQ6s42zZviZoAFI1I9FtWA==, tableContent=null), ArticleFig(id=1241451351746597066, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Fig.2, caption=
Schematic diagram of excitation device, figureFileSmall=zOyH7FrT+kSGiEp9hoh0Fg==, figureFileBig=1Dz7HiZabYIIAqooHTbIqg==, tableContent=null), ArticleFig(id=1241451351847260366, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=图2, caption=
激励装置示意图, figureFileSmall=zOyH7FrT+kSGiEp9hoh0Fg==, figureFileBig=1Dz7HiZabYIIAqooHTbIqg==, tableContent=null), ArticleFig(id=1241451351973089492, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Fig.3, caption=
Computational domain of the flow around the damping plate model, figureFileSmall=HQPl2IyrCrshjSoxQEUqGg==, figureFileBig=ZKKs6ldD5DO6v6Ajxmi3dg==, tableContent=null), ArticleFig(id=1241451352086335702, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=图3, caption=
阻尼板绕流模型计算域, figureFileSmall=HQPl2IyrCrshjSoxQEUqGg==, figureFileBig=ZKKs6ldD5DO6v6Ajxmi3dg==, tableContent=null), ArticleFig(id=1241451352203776219, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Fig.4, caption=
Flow around an obstacle problem mesh division diagram, figureFileSmall=a6Klc6I5zNV/BZl3L5r3HQ==, figureFileBig=+nnYX2wDULjwPUTfcoWMkA==, tableContent=null), ArticleFig(id=1241451352300245215, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=图4, caption=
绕流问题网格划分图, figureFileSmall=a6Klc6I5zNV/BZl3L5r3HQ==, figureFileBig=+nnYX2wDULjwPUTfcoWMkA==, tableContent=null), ArticleFig(id=1241451352493183203, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Fig.5, caption=
Velocity nephogram of symmetry plane, figureFileSmall=LbbgMeVDad5A9jxT40Abng==, figureFileBig=yiF6hHn+0qJDfytg1P5lYg==, tableContent=null), ArticleFig(id=1241451352572874983, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=图5, caption=
对称面速度云图, figureFileSmall=LbbgMeVDad5A9jxT40Abng==, figureFileBig=yiF6hHn+0qJDfytg1P5lYg==, tableContent=null), ArticleFig(id=1241451352669343981, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Fig.6, caption=
Calibration of the moment of inertia measurement system, figureFileSmall=efpnDLIvZepV7ueShG//Ew==, figureFileBig=86tQUGPN6YsYlahLSeuQRw==, tableContent=null), ArticleFig(id=1241451352782590194, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=图6, caption=
转动惯量测量系统标定, figureFileSmall=efpnDLIvZepV7ueShG//Ew==, figureFileBig=86tQUGPN6YsYlahLSeuQRw==, tableContent=null), ArticleFig(id=1241451352996499705, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Fig.7, caption=
Moment of inertia testing in 90° orientation with 400 mm gyration radius, figureFileSmall=8ch1QIa9Qg+LXWCS3EOovg==, figureFileBig=Lt6P9QdDv1cLIVsGUpuRIQ==, tableContent=null), ArticleFig(id=1241451353092968704, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=图7, caption=
400 mm回转半径夹角为90°状态下转动惯量测量, figureFileSmall=8ch1QIa9Qg+LXWCS3EOovg==, figureFileBig=Lt6P9QdDv1cLIVsGUpuRIQ==, tableContent=null), ArticleFig(id=1241451353202020610, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Tab.1, caption=
Dimensions of the computational domain for flow around problem
, figureFileSmall=null, figureFileBig=null, tableContent=
计算域边界 Boundary of computational domain | 几何边界类型 Type of geometric boundary | 物理边界条件 Condition of physical boundary |
|---|
入口 Inlet | 未定义补丁片 Undefined patch | 湍流速度入口 Turbulent velocity inlet |
出口 Outlet | 未定义补丁片 Undefined patch | 入口、出口边界 Inlet, outlet boundary |
阻尼板 Damping plate | 壁面 Wall surface | 壁面函数 Wall function |
前面 Front surface | 壁面 Wall surface | 无滑移光滑壁面 No-slip smooth wall surface |
后面 Back surface | 壁面 Wall surface | 无滑移光滑壁面 No-slip smooth wall surface |
顶面 Top surface | 壁面 Wall surface | 无滑移光滑壁面 No-slip smooth wall surface |
底面 Bottom surface | 壁面 Wall surface | 无滑移光滑壁面 No-slip smooth wall surface |
对称面 Symmetry plane | 对称平面 Symmetric plane | 严格对称平面 Strictly symmetric plane |
), ArticleFig(id=1241451353361404167, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=表1, caption=
绕流问题计算域尺寸
, figureFileSmall=null, figureFileBig=null, tableContent=
计算域边界 Boundary of computational domain | 几何边界类型 Type of geometric boundary | 物理边界条件 Condition of physical boundary |
|---|
入口 Inlet | 未定义补丁片 Undefined patch | 湍流速度入口 Turbulent velocity inlet |
出口 Outlet | 未定义补丁片 Undefined patch | 入口、出口边界 Inlet, outlet boundary |
阻尼板 Damping plate | 壁面 Wall surface | 壁面函数 Wall function |
前面 Front surface | 壁面 Wall surface | 无滑移光滑壁面 No-slip smooth wall surface |
后面 Back surface | 壁面 Wall surface | 无滑移光滑壁面 No-slip smooth wall surface |
顶面 Top surface | 壁面 Wall surface | 无滑移光滑壁面 No-slip smooth wall surface |
底面 Bottom surface | 壁面 Wall surface | 无滑移光滑壁面 No-slip smooth wall surface |
对称面 Symmetry plane | 对称平面 Symmetric plane | 严格对称平面 Strictly symmetric plane |
), ArticleFig(id=1241451353466261771, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Tab.2, caption=
Boundary condition of the computational domain of flow around problem
, figureFileSmall=null, figureFileBig=null, tableContent=
计算域边界 Boundary of computational domain | 边界定义 Boundary definition | 距离(H为平板高度) Distance (H is the height of the plate) |
|---|
入口 Inlet | 距离平板前面 Distance from the front of the plate | 5H |
出口 Outlet | 距离平板后面 Distance from the rear of the plate | 15H |
顶面 Top surface | 距离平板中心点 Distance from the plate center point | 3H |
底面 Bottom surface | 距离平板中心点 Distance from the plate center point | 3H |
前面 Front surface | 距离平板中心点 Distance from the plate center point | 5H |
后面 Back surface | 距离平板中心点 Distance from the plate center point | 5H |
), ArticleFig(id=1241451353634033936, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=表2, caption=
绕流问题计算域边界条件
, figureFileSmall=null, figureFileBig=null, tableContent=
计算域边界 Boundary of computational domain | 边界定义 Boundary definition | 距离(H为平板高度) Distance (H is the height of the plate) |
|---|
入口 Inlet | 距离平板前面 Distance from the front of the plate | 5H |
出口 Outlet | 距离平板后面 Distance from the rear of the plate | 15H |
顶面 Top surface | 距离平板中心点 Distance from the plate center point | 3H |
底面 Bottom surface | 距离平板中心点 Distance from the plate center point | 3H |
前面 Front surface | 距离平板中心点 Distance from the plate center point | 5H |
后面 Back surface | 距离平板中心点 Distance from the plate center point | 5H |
), ArticleFig(id=1241451353722114325, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Tab.3, caption=
Measurement period of the moment of inertia of the damping plate
, figureFileSmall=null, figureFileBig=null, tableContent=
回转半径 Radius of gyration/mm | 角度 Angle/(°) | 空盘测量周期 Empty disk measurement cycle/s | 样件测量周期 Sample measurement cycle/s | 阻尼板测量周期 Damping plate measurement cycle/s |
|---|
| 400 | 0 | | | 1.701 2 |
| 45 | 1.635 7 | 1.805 2 | 1.699 5 |
| 90 | | | 1.698 8 |
| 800 | 0 | | | 1.836 5 |
| 45 | 1.635 7 | 1.805 2 | 1.831 8 |
| 90 | | | 1.829 1 |
| 1 200 | 0 | | | 2.041 1 |
| 45 | 1.635 7 | 1.805 2 | 2.033 0 |
| 90 | | | 2.028 5 |
), ArticleFig(id=1241451353831166233, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=表3, caption=
阻尼板转动惯量测量周期
, figureFileSmall=null, figureFileBig=null, tableContent=
回转半径 Radius of gyration/mm | 角度 Angle/(°) | 空盘测量周期 Empty disk measurement cycle/s | 样件测量周期 Sample measurement cycle/s | 阻尼板测量周期 Damping plate measurement cycle/s |
|---|
| 400 | 0 | | | 1.701 2 |
| 45 | 1.635 7 | 1.805 2 | 1.699 5 |
| 90 | | | 1.698 8 |
| 800 | 0 | | | 1.836 5 |
| 45 | 1.635 7 | 1.805 2 | 1.831 8 |
| 90 | | | 1.829 1 |
| 1 200 | 0 | | | 2.041 1 |
| 45 | 1.635 7 | 1.805 2 | 2.033 0 |
| 90 | | | 2.028 5 |
), ArticleFig(id=1241451353927635230, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Tab.4, caption=
Test data analysis of the moment of inertia measurement of the damping plate
, figureFileSmall=null, figureFileBig=null, tableContent=
回转半径 Radius of gyration/mm | 角度 Angle/(°) | 实测转动惯量 Measured moment of inertia/(kg·m2) | 理论转动惯量 Theoretical moment of inertia/(kg·m2) | 相对误差 Relative error/% |
|---|
| 400 | 0 | 3.92 | | 0.73 |
| 45 | 3.78 | 3.89 | -2.90 |
| 90 | 3.72 | | -4.40 |
| 800 | 0 | 15.71 | | 2.50 |
| 45 | 15.28 | 15.32 | -0.26 |
| 90 | 15.04 | | -1.80 |
| 1 200 | 0 | 35.24 | | 2.50 |
| 45 | 34.43 | 34.37 | 0.19 |
| 90 | 33.98 | | -1.10 |
), ArticleFig(id=1241451353990549793, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=表4, caption=
阻尼板转动惯量测量试验数据分析
, figureFileSmall=null, figureFileBig=null, tableContent=
回转半径 Radius of gyration/mm | 角度 Angle/(°) | 实测转动惯量 Measured moment of inertia/(kg·m2) | 理论转动惯量 Theoretical moment of inertia/(kg·m2) | 相对误差 Relative error/% |
|---|
| 400 | 0 | 3.92 | | 0.73 |
| 45 | 3.78 | 3.89 | -2.90 |
| 90 | 3.72 | | -4.40 |
| 800 | 0 | 15.71 | | 2.50 |
| 45 | 15.28 | 15.32 | -0.26 |
| 90 | 15.04 | | -1.80 |
| 1 200 | 0 | 35.24 | | 2.50 |
| 45 | 34.43 | 34.37 | 0.19 |
| 90 | 33.98 | | -1.10 |
), ArticleFig(id=1241451354103796008, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Tab.5, caption=
Test data correction of the moment of inertia of the damping plate
, figureFileSmall=null, figureFileBig=null, tableContent=
回转半径 Radius of gyration/mm | 角度 Angle/(°) | 0°实测转动惯量 Measured moment of inertia at 0°/(kg·m2) | 90°实测转动惯量 Measured moment of inertia at 90°/(kg·m2) | 相对误差 Relative error/% |
|---|
| 400 | 0 | 3.92 | 3.72 | 5.4 |
| 45 | 3.78 | 1.6 |
| 800 | 0 | 15.71 | 15.04 | 4.5 |
| 45 | 15.28 | 1.5 |
| 1 200 | 0 | 35.24 | 33.98 | 3.7 |
| 45 | 34.43 | 1.3 |
), ArticleFig(id=1241451354246402347, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=表5, caption=
阻尼板转动惯量试验数据修正
, figureFileSmall=null, figureFileBig=null, tableContent=
回转半径 Radius of gyration/mm | 角度 Angle/(°) | 0°实测转动惯量 Measured moment of inertia at 0°/(kg·m2) | 90°实测转动惯量 Measured moment of inertia at 90°/(kg·m2) | 相对误差 Relative error/% |
|---|
| 400 | 0 | 3.92 | 3.72 | 5.4 |
| 45 | 3.78 | 1.6 |
| 800 | 0 | 15.71 | 15.04 | 4.5 |
| 45 | 15.28 | 1.5 |
| 1 200 | 0 | 35.24 | 33.98 | 3.7 |
| 45 | 34.43 | 1.3 |
), ArticleFig(id=1241451354380620080, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Tab.6, caption=
System stiffness calculation
, figureFileSmall=null, figureFileBig=null, tableContent=
空盘测量周期 Empty disk measurement cycle/s | 样件测量周期 Sample measurement cycle/s | 阻尼板测量周期 Damping plate measurement cycle/s | 系统刚度 System stiffness/(N·m) |
|---|
| 1.635 7 | 1.805 2 | 1.702 2 | 24.608 5 |
| 1.698 8 | 24.623 0 |
| 1.699 5 | 24.619 2 |
| 1.836 5 | 24.641 1 |
| 1.831 8 | 24.588 2 |
| 1.829 1 | 24.623 4 |
| 2.041 1 | 24.683 9 |
| 2.033 0 | 24.620 6 |
| 2.028 5 | 24.620 7 |
), ArticleFig(id=1241451355852820788, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=表6, caption=
系统刚度计算
, figureFileSmall=null, figureFileBig=null, tableContent=
空盘测量周期 Empty disk measurement cycle/s | 样件测量周期 Sample measurement cycle/s | 阻尼板测量周期 Damping plate measurement cycle/s | 系统刚度 System stiffness/(N·m) |
|---|
| 1.635 7 | 1.805 2 | 1.702 2 | 24.608 5 |
| 1.698 8 | 24.623 0 |
| 1.699 5 | 24.619 2 |
| 1.836 5 | 24.641 1 |
| 1.831 8 | 24.588 2 |
| 1.829 1 | 24.623 4 |
| 2.041 1 | 24.683 9 |
| 2.033 0 | 24.620 6 |
| 2.028 5 | 24.620 7 |
), ArticleFig(id=1241451356016398650, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Tab.7, caption=
Air damping of the approximate steady-state
, figureFileSmall=null, figureFileBig=null, tableContent=
回转半径 Radius of gyration/mm | 理论转动惯量 Theoretical moment of inertia/(kg·m2) | 理论振动周期 Theoretical oscillation period/s | 实测空气阻尼比 Measured air damping ratio |
|---|
| 800 | 81.205 8 | 1.806 | 0.031 |
| 1 200 | 100.255 6 | 2.007 | 0.041 |
), ArticleFig(id=1241451356104479036, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=表7, caption=
近似定常状态空气阻尼
, figureFileSmall=null, figureFileBig=null, tableContent=
回转半径 Radius of gyration/mm | 理论转动惯量 Theoretical moment of inertia/(kg·m2) | 理论振动周期 Theoretical oscillation period/s | 实测空气阻尼比 Measured air damping ratio |
|---|
| 800 | 81.205 8 | 1.806 | 0.031 |
| 1 200 | 100.255 6 | 2.007 | 0.041 |
), ArticleFig(id=1241451356196753725, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=EN, label=Tab.8, caption=
Drag coefficient at different Reynolds numbers
, figureFileSmall=null, figureFileBig=null, tableContent=
雷诺数 Reynolds number Re | 250 | 750 | 1 000 | 5 000 | 15 000 |
|---|
阻力系数 Drag coefficient Cd | 2.20 | 2.31 | 2.26 | 2.03 | 2.36 |
), ArticleFig(id=1241451356268056896, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408876097106722, language=CN, label=表8, caption=
不同雷诺数下的阻力系数
, figureFileSmall=null, figureFileBig=null, tableContent=
雷诺数 Reynolds number Re | 250 | 750 | 1 000 | 5 000 | 15 000 |
|---|
阻力系数 Drag coefficient Cd | 2.20 | 2.31 | 2.26 | 2.03 | 2.36 |
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