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水下平板壁面剪应力MEMS测量研究进展

田于逵 张璇 沈雪 孙海浪 谢华 张楠

田于逵, 张璇, 沈雪, 等. 水下平板壁面剪应力MEMS测量研究进展[J]. 实验流体力学, 2017, 31(3): 82-87. doi: 10.11729/syltlx20170031
引用本文: 田于逵, 张璇, 沈雪, 等. 水下平板壁面剪应力MEMS测量研究进展[J]. 实验流体力学, 2017, 31(3): 82-87. doi: 10.11729/syltlx20170031
Tian Yukui, Zhang Xuan, Shen Xue, et al. Research on underwater flat plate wall shear stress measurement with MEMS sensors array[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(3): 82-87. doi: 10.11729/syltlx20170031
Citation: Tian Yukui, Zhang Xuan, Shen Xue, et al. Research on underwater flat plate wall shear stress measurement with MEMS sensors array[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(3): 82-87. doi: 10.11729/syltlx20170031

水下平板壁面剪应力MEMS测量研究进展

doi: 10.11729/syltlx20170031
基金项目: 

国家重大科学仪器设备开发专项 2013YQ040911

详细信息
    作者简介:

    田于逵(1968-), 男, 湖北潜江人, 研究员。研究方向:船舶流体测试技术, 复杂流动的精细测量与控制研究。通信地址:江苏无锡116信箱(214082)。E-mail:tyk702@sina.com

    通讯作者:

    田于逵, E-mail:tyk702@sina.com

  • 中图分类号: TV131

Research on underwater flat plate wall shear stress measurement with MEMS sensors array

  • 摘要: 围绕水下平板壁面剪应力测量进行了一系列的试验测试研究工作,包括MEMS壁面剪应力传感器标定、平板模型设计、微弱信号测量系统开发、平板边界层参数估计与CFD仿真分析以及近壁面速度剖面LDV测量等。对于速度为0.2~0.7m/s的来流,基于MEMS传感器阵列对水下壁面剪应力进行了测量,同时使用LDV进行速度剖面测量,并通过对速度剖面的拟合求解出平均壁面剪应力值。通过比较可知,MEMS测量结果、LDV速度剖面法拟合结果和经验公式计算结果三者一致性较好,相互之间差别在5%以内。
  • 图  1  用于壁面剪应力检测试验的平板模型

    Figure  1.  Schematic of the flat plate model for WSS benchmark tests

    图  2  水下MEMS壁面剪应力传感器阵列(西工大)

    Figure  2.  MEMS sensors array for underwater WSS measurement calibration (courtesy of NPU)

    图  3  热膜式传感器阵列数据采集框图(加平衡环节)

    Figure  3.  Data acquisition diagram of hot-film sensor array(with the OBS)

    图  4  物理模型示意图

    Figure  4.  Computational model diagram

    图  5  计算网格与边界条件类型

    Figure  5.  Computation mesh and boundary condition

    图  6  v=0.7m/s平板壁面剪应力云图

    Figure  6.  Contours of wall shear stress distribution(v=0.7m/s)

    图  7  5号热敏单元标定曲线

    Figure  7.  Calibration curve of No.5 sensor element

    图  8  LDV的布置图(边界层速度剖面测量)

    Figure  8.  LDV arrangement for detection of boundary layer velocity profiles

    图  9  低流速下速度剖面与Blausis解的比较

    Figure  9.  Velocity profiles for lower freestream velocities compared with Blausis

    图  10  高流速度下速度剖面与Spalding速度剖面的比较

    Figure  10.  Velocity profiles for higher freestream velocities compared with Spalding

    图  11  壁面剪应力测量和经验估值结果比较

    Figure  11.  Comparison of WSS among measurement results and empirical estimations

    表  1  标定公式拟合结果

    Table  1.   Fitting results of calibration equation

    表  2  MEMS测量结果(5号敏感单元)

    Table  2.   Results of MEMS sensors

    表  3  平板边界层基本流动参数

    Table  3.   Flat plate boundary layer parameters

    表  4  壁面剪应力测量和经验估值结果(5号敏感单元)

    Table  4.   Wall shear stress from measurements and empirical estimations(5# MEMS element)

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出版历程
  • 收稿日期:  2017-01-16
  • 修回日期:  2017-05-19
  • 刊出日期:  2017-06-25

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