CLARIFICATION OF UNSTEADY CHARACTERISTICS IN SEPARATED FLOW OVER AN AXISYMMETRIC PARABOLOID AT HIGH ANGLES OF ATTACK

机译：高攻角对称抛物面上分离流动中非稳态特征的澄清。

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The phenomenon of three-dimensionalrnseparation of the flow over a slender body atrnhigh angles of attack is difficult to model andrnstill challenging problem. The singularity of thernflow is caused by mutual intervention of threedimensionalrnseparation and separated vortices.rnIn this study, the flow in the cross-flowrnseparation region of an axisymmetricrnparaboloid at 40 and 50 deg angle of attack hasrnbeen investigated experimentally by hot wirernanemometer. Reynolds numbers are 9.0×10~3rnand 1.8×10~4 referred to the base diameter. Xtypernprobe was used to measure threerndimensional velocity fluctuations over thernaxisymmetric paraboloid at sampling time ofrn4kHz. It has been shown that the lift-off andrnmergence of vortices can be explained by r.m.s.rndistribution of velocity fluctuations. Reynoldsrnstress and the difference between probabilityrndensity function and normal distributionrnfluctuate where the kink of vortex is observed.

机译：在高攻角下，细长体上的三维流动分离现象很难建模，也很难解决。流的奇异性是由三维分离和涡旋的相互干预引起的。在这项研究中，通过热线测力仪实验研究了在40和50度迎角下轴对称抛物面的错流分离区中的流动。雷诺数为9.0×10〜3rn和1.8×10〜4（相对于基径）。 X型探针用于测量对称对称抛物面在4kHz采样时间的三维速度波动。已经表明，涡旋的升起和消失可以用速度波动的r.m.s.rn分布来解释。雷诺应力和概率密度函数与正态分布之间的差异会在观察到涡旋扭结的地方波动。

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来源
《23rd international congress of aeronautical sciences (ICAS 2002)》|2002年|p.1-12|共12页
会议地点 Toronto(CA);Toronto(CA)
作者
Tadateru Ishide; Nobuhide Nishikawa; Fumihiko Mikami;
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作者单位

Kisarazu National College of Technology , 2-11-1,kiyomidai-higashi , Kisarazu City;

Chiba University , 1-33 , yayoi-cho , inage-ku , Chiba City;

Chiba University , 1-33 , yayoi-cho , inage-ku , Chiba City;

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会议组织
原文格式 PDF
正文语种 eng
中图分类航空;
关键词
three dimensional separated flow; velocity fluctuation; hot wire anemometer; probability density function;

机译：三维分流;速度波动;热线风速仪;概率密度函数;

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专利

1. Clarification of Unsteady Characteristics in Separated Flow over Axisymmetric Paraboloid at High Angles of Attack [J] . Tadateru Ishide, Nobuhide Nishikawa, Fumihiko Mikami 日本航空宇宙学会論文集 . 2000,第562期

机译：澄清高攻角下轴对称抛物面分离流动中的不稳定特征
2. Clarification of Unsteady Characteristics in Separated Flow over Axisymmetric Paraboloid at High Angles of Attack [J] . Tadateru Ishide, Nobuhide Nishikawa, Fumihiko Mikami 日本航空宇宙学会論文集 . 2000,第562期

机译：澄清高攻角时轴对称抛物面分离流动中的不稳定特征
3. Experimental investigation of ventilated partial cavitating flows with special emphasis on flow pattern regime and unsteady shedding behavior around an axisymmetric body at different angles of attack [J] . Liu Taotao, Huang Biao, Wang Guoyu, Ocean Engineering . 2018,第JANa1期

机译：通风的部分空化流的实验研究，特别侧重于不同攻角的流型状态和轴对称体周围的非稳态脱落行为
4. SMOKE VISUALIZATION AND DATA ANALYSIS OF HOT WIRE MEASUREMENTS IN SEPARATED VORTICES OVER AN AXISYMMETRIC PARABOLOID AT HIGH ANGLES OF ATTACK [C] . Tadateru ISHIDE, Nobuhide NISHIKAWA Congress of the International Council of the Aeronautical Sciences;ICAS 2010 . 2010

机译：高攻击角轴对称抛物面上分离涡内热线的烟熏可视化和数据分析。
5. An investigation of unsteady pressure and temperature characteristics due to shock-boundary layer interactions in a mach 6 axisymmetric flowfield [D] . Flanagan, Michael John, Jr. 1991

机译：马赫6轴对称流场中由于冲击边界层相互作用而引起的非稳态压力和温度特性的研究
6. The Effects of Thermal Radiation on an Unsteady MHD Axisymmetric Stagnation-Point Flow over a Shrinking Sheet in Presence of Temperature Dependent Thermal Conductivity with Navier Slip [O] . Sabyasachi Mondal, Nageeb A. H. Haroun, Precious Sibanda -1

机译：存在Navier滑移的温度相关导热系数时热辐射对收缩板上非定常MHD轴对称停滞点流的影响
7. Smoke Visualization and Data Analysis of Hot Wire Measurements in Separated Vortices over an Axisymmetric Paraboloid at High Angles of Attack. [O] . Tadateru ISHIDE, Nobuhide NISHIKAWA, Fumihiko MIKAMI 2002

机译：高角度下轴对称抛物面在轴对称抛物线上分离涡旋中热线测量的烟雾可视化和数据分析。
8. Unsteady Aerodynamics for Advanced Configurations. Part V. Unsteady Potential Flow around Slender Bodies at Angles of Attack [R] . Li, T. C. 1965

机译：高级配置的非定常空气动力学。第五部分攻击角度下细长体周围的非定常势流

CLARIFICATION OF UNSTEADY CHARACTERISTICS IN SEPARATED FLOW OVER AN AXISYMMETRIC PARABOLOID AT HIGH ANGLES OF ATTACK

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