|Table of Contents|

Numerical Investigation on Axial Evolution of Flow-pattern Topological Structure over Slender Body

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2008年02期
Page:
160-164
Research Field:
Publishing date:

Info

Title:
Numerical Investigation on Axial Evolution of Flow-pattern Topological Structure over Slender Body
Author(s):
GUAN Xiao-rongXU Cheng
School of Mechanical Engineering,NUST,Nanjing 210094,China
Keywords:
slender body high incidence sectional flow pattern topological structure axial evolution numerical method
PACS:
V211.4
DOI:
-
Abstract:
The process of primary vortices forming,lifting and shedding alternately along central axis from opposite sides of a slender body placed at high incidence to an oncoming stream is investigated numerically,and laws on axial evolution of its sectional flow-pattern topological structure are advanced.Some important phenomena,including primary vortex inducing reattached shear layer to form secondary vortex,secondary vortex dividing primary vortex to generate tertiary vortex,primary vortex merging with opposite secondary vortex,and primary vortex dividing opposite primary vortex to form shed vortex,are described,where the roles of secondary and tertiary vortex are stressed.The influence of incidence magnitude on the process is also discussed.With the incidence increase,the axial process is accelerated,and flow asymmetry gets harder;in addition,asymmetric flow pattern moves closer to nose,and quasi-steady flow region shrinks towards forebody.

References:

[1] H unt B L. Asymm etr ic vortex forces and w akes on slender bod ies[ R]. AIAA - 82- 1336, 1982.
[2] Low sonM V, Ponton A J. Symm e try break ing in vo r?? tex flows on con ica l bod ies[ J] . AIAA Journa,l 1995, 30( 6): 1 576- 1 583.
[3] 王刚, 邓学蓥, 王延奎, 等. 亚临界雷诺数细长体 绕流流态随迎角的变化和分区[ J]. 流体力学实验 与测量, 2003, 17 ( 2) : 19- 25.
[4] 刘沛清, 邵延峰, 邓学蓥, 等. 大迎角细长旋成体 绕流结构演变过程实验研究[ J]. 航空学报, 2003, 24( 6): 503- 506.
[5] 杨云军, 崔尔杰, 周伟江. 细长体大迎角非对称涡 流的数值研究[ J]. 力学学报, 2004, 36( 1): 1- 7.
[6] 周乃春, 叶正寅, 胡汉东, 等. 细长尖头旋成体大 迎角非对称涡系结构[ J]. 空气动力学学报, 2004, 22( 4): 486- 489.
[7] 王刚, 梁新刚, 邓学蓥. 细长体绕流tertia ry涡的形 成与非对称过程[ J]. 清华大学学报( 自然科学 版), 2004, 44( 8): 1 120- 1 125.
[8] Zilliac G G, Degani D, TobakM. A symme tr ic vo rtices on a slender body o f revo lu tion [ J]. AIAA Journa,l 1991, 29( 5): 667- 675.
[9] 李国辉, 邓学蓥. 细长体截面流态拓扑结构演化及 其稳定性分析[ J]. 北京航空航天大学学报, 2001, 27( 6): 674- 676.
[10] Deng Xuey ing, Chen Xueru,i W ang Yanku,i et a.l Influence of nose pe rturba tions on behav io rs o f asym?? m etric vortices over slender body [ R] . AIAA - 2002 - 4710, 2002.
[11] Deng Xuey ing, W ang Yanku,i Chen Xueru .i Dete r?? m in istic flow field and flow structure model o f asym?? m etric vortices ove r slender body [ R]. A IAA - 2003 - 5475, 2003.
[12] 刘沛清, 邓学蓥. 大迎角细长体绕流背涡结构与气 动特性分析[ J]. 力学学报, 2002, 34 ( 2): 248 - 254.
[13] 吴子牛. 计算流体力学基本原理[M ]. 北京: 科学 出版社, 2001.
[14] 童秉刚, 张炳暄, 崔尔杰. 非定常流与涡运动[M ]. 北京: 国防工业出版社, 1993.

Memo

Memo:
-
Last Update: 2008-04-30