Simple Mean-Error Estimation of a Recalibration Scheme for Constant-Temperature Anemometry Measurements
Simple Mean-Error Estimation of a Recalibration Scheme for Constant-Temperature Anemometry Measurements
复制标题
恒温风速测量重新校准方案的简单平均误差估计
DOI：
10.1088/1742-6596/1324/1/012062
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Yutaka Hasegawa
中科院分区：
文献类型：
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作者：
Hiroki Suzuki;Yoshiaki Shikata;Shinsuke Mochizuki;Yutaka Hasegawa
本研究解决了最近一项研究中提出的恒温风速（CTA）测量的再校准方案的误差。这种重新校准方案可以减少环境温度变化的影响，这在CTA测量中应该是可以忽略不计的。本研究研究了由于使用重新校准方案而引起的误差的时间变化。在本研究中，使用基于CTA测量中使用的校准曲线的一般形式的随时间变化的校准曲线来验证由重新校准方案产生的校准曲线。本研究考虑的速度U范围为U= 1−40 m/s。结果表明，在小流速范围内，标定曲线的相对误差较大。在小流速和自由流流速范围内，标定曲线梯度的相对误差也很显著，相当于速度波动的误差。一个简单的三次函数可以准确地近似这些相对误差的时间变化。此外，还可以推导出一种计算相对误差平均值的简单形式，并利用目前的数值结果进行了验证。
The present study has addressed the error of a recalibration scheme for constant-temperature anemometry (CTA) measurement proposed in a recent study. This recalibration scheme could reduce the effects of the ambient temperature change, which should be negligible in a CTA measurement. The present study has investigated a temporal variation of the error due to the use of the recalibration scheme. In the present study, a calibration curve produced by the recalibration scheme is validated using a temporally varying calibration curve, which is based on the general form of a calibration curve used in CTA measurement. The range of velocity U considered in the present study is U= 1− 40 m/s. As a result, the relative error of the calibration curve is significant in the range of small velocity. The relative error of the gradient of the calibration curve, which is equivalent to the error of the velocity fluctuation, is also significant in the range of both small velocity and free-stream velocity. A simple cubic function could accurately approximate the temporal variation of these relative errors. Moreover, a simple form for calculating the mean value of the relative error could be derived and validated using the present numerical results.