A modified trailing vortex wake model of propeller is introduced to describe the distortion and separation of the trailing vortex sheet.
采用了一个修正的螺旋桨尾涡模型，来模拟导管螺旋桨尾涡片的扭曲变形及分离现象。
Finally, in view of vortex sheet, the formula of virtual mass has been re-derived.
最后，本文从涡层的角度重新推导了翼型虚拟质量计算公式。
A vortex member is arranged on the vortex net board. The vortex member is a spiral twist sheet with a spiral Angle. The axial shape of the spiral twist sheet is circular.
所述旋流构件为一段带螺旋角的螺旋扭片，所述螺旋扭片的轴向形状为圆形。
Wenling city DingSheng vacuum apparatus Co. , lLtd. lies in Wenling city south of the town , it is an enterprise which specializes in producing the vortex sheet type vacuum pump and vacuum apparatus.
温岭市鼎盛真空设备有限公司位于温岭市城南镇，是一家专业生产旋片式真空泵及真空设备的企业。
Wenling city DingSheng vacuum apparatus Co. , lLtd. lies in Wenling city south of the town , it is an enterprise which specializes in producing the vortex sheet type vacuum pump and vacuum apparatus.
温岭市鼎盛真空设备有限公司位于温岭市城南镇，是一家专业生产旋片式真空泵及真空设备的企业。
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