SPECTRAL CHARACTERISTICS OF VORTEX BREAKDOWN FLOWFIELDS

被引：120
作者：
GARG, AK
LEIBOVICH, S
机构：
[1] Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca
来源：
PHYSICS OF FLUIDS | 1979年 / 22卷 / 11期
关键词：
D O I：
10.1063/1.862514
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Laser-Doppler anemometer measurements upstream and in the wakes of vortex breakdowns of bubble and spiral types are described. Spectral analysis of the data indicates prominent oscillations in the wakes at less than 10 Hz. These oscillations correspond closely to theoretical predictions of the linearly most unstable normal modes of the time-averaged mean flow profiles. The oscillations are more energetic, and vortex core expansions are greater for flows with a bubble form of vortex breakdown, which is therefore regarded as the stronger form of breakdown. © 1979 American Institute of Physics.
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页码：2053 / 2064
页数：12
相关论文
共 10 条
[1]   EXPERIMENTAL MAP OF INTERNAL STRUCTURE OF A VORTEX BREAKDOWN [J].
FALER, JH ;
LEIBOVICH, S .
JOURNAL OF FLUID MECHANICS, 1978, 86 (MAY) :313-&
[2]   DISRUPTED STATES OF VORTEX FLOW AND VORTEX BREAKDOWN [J].
FALER, JH ;
LEIBOVICH, S .
PHYSICS OF FLUIDS, 1977, 20 (09) :1385-1400
[3]  
GARG A, 1977, THESIS CORNELL U
[4]   ON THE HYDRODYNAMIC AND HYDROMAGNETIC STABILITY OF SWIRLING FLOWS [J].
HOWARD, LN ;
GUPTA, AS .
JOURNAL OF FLUID MECHANICS, 1962, 14 (03) :463-476
[5]   LIGHT-SCATTERING PARTICLES FOR LASER VELOCIMETER MEASUREMENTS [J].
KREID, DK ;
ROWE, DS .
APPLIED OPTICS, 1976, 15 (02) :321-322
[6]   STRUCTURE OF VORTEX BREAKDOWN [J].
LEIBOVICH, S .
ANNUAL REVIEW OF FLUID MECHANICS, 1978, 10 :221-246
[7]  
LEIBOVICH S, UNPUBLISHED
[8]   STABILITY OF A TRAILING LINE VORTEX .1. INVISCID THEORY [J].
LESSEN, M ;
SINGH, PJ ;
PAILLET, F .
JOURNAL OF FLUID MECHANICS, 1974, 63 (MAY15) :753-763
[9]  
LESSEN M, COMMUNICATION
[10]   EXPERIMENTS ON VORTEX STABILITY [J].
SINGH, PI ;
UBEROI, MS .
PHYSICS OF FLUIDS, 1976, 19 (12) :1858-1863
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