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[1]刘智丽,林献武*.有黏流场中旋成椭球体的轴向附加质量系数计算[J].厦门大学学报(自然科学版),2019,58(03):408-414.[doi:10.6043/j.issn.0438-0479.201809029]
 LIU Zhili,LIN Xianwu*.Calculation of axial added mass coefficient of an ellipsoid moving in the viscous fluid[J].Journal of Xiamen University(Natural Science),2019,58(03):408-414.[doi:10.6043/j.issn.0438-0479.201809029]
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有黏流场中旋成椭球体的轴向附加质量系数计算(PDF/HTML)
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《厦门大学学报(自然科学版)》[ISSN:0438-0479/CN:35-1070/N]

卷:
58卷
期数:
2019年03期
页码:
408-414
栏目:
研究论文
出版日期:
2019-05-28

文章信息/Info

Title:
Calculation of axial added mass coefficient of an ellipsoid moving in the viscous fluid
文章编号:
0438-0479(2019)03-0408-07
作者:
刘智丽林献武*
厦门大学航空航天学院,福建 厦门 361005
Author(s):
LIU ZhiliLIN Xianwu*
School of Aerospace Engineering,Xiamen University,Xiamen 361005,China
关键词:
飞艇气动力 相对运动原理 傅里叶分析法 附加质量系数
Keywords:
airship aerodynamics relative motion principle Fourier analysis axial added mass coefficient
分类号:
O 355
DOI:
10.6043/j.issn.0438-0479.201809029
文献标志码:
A
摘要:
为了估算有黏流情况下飞艇的轴向附加质量系数,采用计算流体动力学(CFD)技术计算了有黏流情况下椭球体在时变来流速度下的气动力随时间变化曲线,然后通过傅里叶分析法辨识得到了椭球体的非定常气动力系数,最后将与加速度相关的气动力系数折算成轴向附加质量系数.通过研究相同空速下,来流速度对气动力的影响,将运动体在静止来流中运动的气动力计算问题转化为相同空速下运动体静止而来流时变的气动力计算问题.这种转化避免了在CFD计算中使用动网格技术.数值计算的结果表明:在一定的条件下,有黏流场中也可以定义轴向附加质量的概念; 但有黏流的轴向附加质量和无黏流中的结果有较大的差异.
Abstract:
To estimate the axial added mass(AAM)coefficient of the airship in viscous flow,we have computed the aerodynamic force of an ellipsoid suffered in a uniform but unsteady incoming flow based on CFD technology.The Fourier analysis method is then adopted to identify the unsteady aerodynamic force coefficient.At last,the acceleration-related aerodynamic coefficient is converted to AAM coefficient.By studying the effect of the incoming flow velocity on the aerodynamic force under the same airspeed,this computational problem of a solid moving in the fluid that rests at infinity is transformed into the case where the solid is stationary while the velocity of the incoming flow is time-varying.This transformation avoids adopting the dynamic mesh technology in CFD simulation.Numerical results show that,under certain conditions,the concept of AAM can also be defined in the viscous flow field.However,the AAM in viscous flows deviates from the corresponding result in potential flows distinctly.

参考文献/References:

[1] KHOURY G A,GILLETT J D.Airship technology[M].2nd ed.New York:Cambridge University Press,2012:36.
[2] Lamb H.Hydrodynamics [M].6th ed.New York:Dover,1945:160-201.
[3] TUCKERMAN L B.Inertia factors of ellipsoids for use in airship design,report No.210[R].Texas:Technical Report Archive and Image Library,1926.
[4] MUNK M M.The aerodynamic forces on airship hulls,report No.184[R].Seattce:National Advisory Committee for Aeronautics,1924.
[5] 方振平,陈万春,张曙光.航空飞行器飞行动力学[M].北京:北京航空航天大学出版社,2005:223.
[6] JONES S P,DELAURIER J D.Aerodynamic estimation techniques for aerostats and airship[J].Journal of Aircraft,2015,20(2):120-126.
[7] WANG X L.Computational fluid dynamics predictions of stability derivatives for airship[J].Journal of Aircraft,2012,49(3):933-940.
[8] CALERO J S.Jean le rond d’alembert:a new theory of the resistance of fluids[M].Berlin:Springer,2018:71.
[9] THOMASSON P G.Equations of motion of a vehicle in a moving fluid[J].Journal of Aircraft,2000,37(4):630-639.
[10] JOSé,AZINHEIRA R,PAIVA E C D,et al.Influence of wind speed on airship dynamics[J].Journal of Guidance Control & Dynamics,2002,25(25):1116-1124.
[11] WU J C.Elements of vorticity aerodynamics[M].Shanghai:Shanghai Jiaotong University Press,2014:55,77-94.
[12] 林献武,兰维瑶,李智斌,等.时变系统流场动量定理的积分形式及其在流体动力系数分析中的应用[J].应用数学和力学,2016,37(6):551-566.
[13] WU J Z,MA H Y,ZHOU M D.Vorticity and vortex dynamics[M].Berlin Heidelberg:Springer,2006:617-639.
[14] 林新武,林献武,兰维瑶.不可压缩流中飞艇艇体气动力的计算方法研究[D].厦门:厦门大学,2018:31-51.

备注/Memo

备注/Memo:
收稿日期:2018-09-22 录用日期:2019-03-17
基金项目:国家自然科学基金(61733017); 福建省自然科学基金(2016J01030)
*通信作者:linxianw@xmu.edu.cn
更新日期/Last Update: 1900-01-01