摘要
针对基于压电效应研制的一维剪切湍流传感器容易受到外界干扰,仅能实现对湍流未知演化阶段、单垂线通路进行一维观测的缺点,以及对边界层产生的湍流各向异性特性有观测局限性问题,提出了基于等强度正交十字梁结构的二维湍流传感器,解决了一维剪切传感器不能同时感知水平和垂向速度脉动的现状,实现了二维矢量、高空间分辨率的湍流探测。湖试实验结果表明,设计的二维湍流传感器0.7 m/s的流速下灵敏度系数达到了1.916×10^(-5)~2.668×10^(-5)Vms^(2)/kg,可以测量湍流并能够获得10^(-8)数量级的低动能湍流耗散率。
Aiming at the shortcomings that one-dimensional shear turbulence sensor based on piezoelectric effects is prone to external interference and achieve one-dimensional observation of the unknown evolution stage of turbulence and a single vertical path,as well as the observation of the anisotropy of the turbulence in the boundary layer has some limitations,a two-dimensional turbulence sensor based on orthogonal cross beam with equal strength is proposed.The situation that one-dimensional shear sensor can not sense horizontal and vertical velocity fluctuations at the same time is solved,turbulence detection in a two-dimensional vector and high spatial resolution is realized.The results of onsite lake trials show that the sensitivity coefficient of designed two-dimensional turbulence sensor reaches the level of 1.916×10^(-5)~2.668×10^(-5)Vms^(2)/kg at the flow rate of 0.7 m/s,and the low kinetic turbulence dissipation rate is at the order of 10^(-8).
作者
宋大雷
刘晓源
韩德超
陈小平
宋源基
王向东
SONG Dalei;LIU Xiaoyuan;HAN Dechao;CHEN Xiaoping;SONG Yuanji;WANG Xiangdong(College of Engineering,Ocean University of China,Qingdao 266100,China;Institute of Advanced Marine Studies,Ocean University of China,Qingdao 266100,China;Basic Teaching Center of Ocean University of China,Qingdao 266100,China)
出处
《传感器与微系统》
CSCD
北大核心
2023年第10期21-24,共4页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(41527901)。
关键词
等强度
正交梁
湍流
二维传感器
耗散率
equal strength
orthogonal beam
turbulence
two-dimensional sensor
dissipation rate
