用自相关法确定VITA法的门限K 被引量：2

Determination of the Threshold in VITA Scheme by Using Self-Correlation Method

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摘要研究了用VITA条件采样方法检测壁湍流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 ,确定壁湍流猝发VITA条件采样的门限值K。 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.

作者姜楠王振东舒玮

机构地区天津大学力学系中国科学院力学研究所非线性力学国家重点实验室

出处《实验力学》 CSCD 北大核心 2000年第1期30-35,共6页 Journal of Experimental Mechanics

基金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国家"九五"攀登计划联合资助项目

关键词猝发 VITA 自相关门限湍流 burst VITA self correlation threshold

分类号 O357.5 [理学—流体力学]

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