| 用自相关法确定VITA法的门限K |
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| 引用本文： | 姜楠,王振东,舒玮.用自相关法确定VITA法的门限K[J].实验力学,2000,15(1):30-35. |
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| 作者姓名： | 姜楠 王振东 舒玮 |
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| 作者单位： | 1. 天津大学力学系,天津,300072;中国科学院力学研究所非线性力学国家重点实验室,北京,100080
2. 天津大学力学系,天津,300072 |
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| 基金项目： | 国家自然科基金、教育部高等学校博士学科点专项科研基金和国家“九五”攀登计划联合资助项目 |
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| 摘 要： | 研究了用ＶＩＴＡ条件采样方法壁湍猝发的门限值与壁湍流猝发平均周期之间的关系，根据用壁湍流流向脉动速度自相关函数检测得到的壁湍流猝发平均周期，确定壁，湍猝发ＶＩＴＡ条件采样的门限值Ｋ。
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| 关 键 词： | 猝发 VITA 自相关 门限 湍流 |
| 文章编号： | 1001-4888(2000)01-0030-06 |
| 修稿时间： | 1999-06-05 |
Determination of the Threshold in VITA Scheme by Using Self-Correlation Method |
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| JIANG Nan,WANG Zhen-dong,SHU Wei.Determination of the Threshold in VITA Scheme by Using Self-Correlation Method[J].Journal of Experimental Mechanics,2000,15(1):30-35. |
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| Authors: | JIANG Nan WANG Zhen-dong SHU Wei |
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| Institution: | JIANG Nan
;(Departnent of Mechanics,Tianjin University,Tianjin 300072);JIANG Nan
;(Chinese Academy of Sciences Institute of Mechanics LNM, Beijing 100080);WANG Zhen-dong
,SHU Wei
;(Departnent of Mechanics,Tianjin University,Tianjin 300072) |
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| Abstract: | The interrelation between the average burst period of coherent structures in wall turbulence and the threshold value K in VITA conditional sampling scheme for detecting coherent structure is investigated experimentally. It is shown that according to the coherent average burst period of coherent structure detected by selfcorrelation function of longitudinal fluctuating velocity component in wall turbulence,the threshold value K in VITA scheme can be determined reasonablly. |
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| Keywords: | burst VITA self-correlation threshold |
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