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1. 发明公开

EP3495121A1 METHOD FOR DERIVING BUCKLING CONDITION OF FIBERS MOVING IN FLUID, BREAKING CONDITION CALCULATION METHOD, AND FIBER LENGTH DISTRIBUTION PREDICTION METHOD 审中-公开
公开(公告)号：EP3495121A1
公开(公告)日：2019-06-12
申请号：EP17837032.6
申请日：2017-08-02
申请人： R-Flow Co., Ltd.
发明人： TAKEDA Hiroshi
IPC分类号： B29C70/10 , G06F17/50
摘要： In a method of deriving the buckling condition of a cylindrical fiber moving in a fluid, a method of calculating the breakage condition thereof, and a method of forecasting the fiber length distribution, the flow field around a cylindrical fiber in a contraction flow is determined by a stricter method.
The method of deriving the buckling condition, which is a condition under which buckling occurs, of a cylindrical fiber moving in a fluid, includes the step of multiplying a dimensionless fluid stress distribution, uniquely determined with regard to the aspect ratio r 0 ' of the cylindrical fiber, by µk (where µ represents fluid viscosity and k represents the contraction rate (velocity gradient in the length direction at the location where the fiber is present)) at a location where the cylinder is present, to obtain the fluid stress distribution acting on the cylinder surface in a contraction flow, and the step of using a minimum eigenvalue λ 0 , which is the threshold for buckling derived from the fluid stress distribution on the cylinder surface, to derive the buckling condition, wherein the buckling condition is represented by µk ≥ -(λ 0 Er 0 ' 4 log r 0 ")/4 (where E is Young's modulus and r 0 ' is the aspect ratio of the cylinder).

2. 发明公开

EP2995821A1 PIEZO FAN 有权
标题翻译： PIEZOELEKTRISCHERLÜFTER
公开(公告)号：EP2995821A1
公开(公告)日：2016-03-16
申请号：EP14887708.7
申请日：2014-07-30
申请人： R-Flow Co., Ltd.
发明人： TAKEDA, Hiroshi
IPC分类号： F04D33/00
CPC分类号： F04D33/00 , F04D25/08 , H01L41/094
摘要： A piezoelectric fan is provided that can effectively supply airflow to a subject to be cooled. The piezoelectric fan 100 includes an air blower 110 having a free end 110a and a fixed end 110b, and a planar piezoelectric element 120 fixed to the air blower 110. The piezoelectric element 120 causes vibration of the free end 110a of the air blower 110. The air blower 110 includes a first plate 112 to which the piezoelectric element 120 is fixed, and a second plate 114 and a third plate 116 which are orthogonal to the first plate 112 and parallel to each other. In this structure, the free end 110a of the air blower 110 is H-shaped. The H-shaped blowing end of the air blower effectively prevents lateral airflow and improves the directivity of airflow.
摘要翻译：提供了能够有效地向被冷却对象供给气流的压电风扇。压电风扇100包括具有自由端110a和固定端110b的空气鼓风机110和固定在鼓风机110上的平面压电元件120.压电元件120引起鼓风机110的自由端110a的振动。鼓风机110包括固定有压电元件120的第一板112和与第一板112正交并且彼此平行的第二板114和第三板116。在这种结构中，鼓风机110的自由端110a为H形。鼓风机的H形吹风口有效地防止横向气流并改善气流的方向性。

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