| 基于隐式温度修正的二维热线风速仪校准方法 |
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| 引用本文： | 张军,张俊龙,雷红胜,赵维明,Con.Doolan.基于隐式温度修正的二维热线风速仪校准方法[J].空气动力学学报,2020,38(1):43-47,65. |
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| 作者姓名： | 张军 张俊龙 雷红胜 赵维明 Con.Doolan |
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| 作者单位： | 中国空气动力研究与发展中心 气动噪声控制重点实验室,四川 绵阳 621050;中国空气动力研究与发展中心 结冰与防除冰重点实验室,四川 绵阳 621050;澳大利亚新南威尔士大学 机械与制造工程学院,悉尼 2052 |
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| 基金项目： | 国家自然科学基金项目(11504417) |
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| 摘 要： | 热线风速仪主要用于湍流流场测量。热线测量的主要误差来源是由环境温度变化导致的热线校准参数的变化。Brunn提出的传统温度效应修正方法在环境温度变化较大的情况下会带来明显的误差。本文经过理论推导,提出了一种新的基于隐式温度修正的二维热线风速仪校准方法,并开展了热线校准实验研究。结果表明:当环境温度变化在4℃范围内时,本文提出的方法与Brunn方法的测量精度相当;当环境温度变化超过4℃时,本文提出的方法的测量精度远高于Brunn方法。
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| 关 键 词： | 二维热线 温度修正 校准方法 |
A cross-hotwire calibration method with implicit temperature correction |
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| Institution: | (Key Laboratory of aerodynamic noise control,China aerodynamics research and development center,Mianyang 621050,China;Key laboratory of icing and de-icing research,China aerodynamics research and development center,Mianyang 621050,China;Mechanical and Manufacturing School,University of New South Wales 2052,Sydney,Australia) |
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| Abstract: | Hotwire anemometry is mainly used for turbulence measurement.The main source of error for hot-wire anemometry is the variation of ambient temperature.The most popular temperature correction method was given by Brunn.However,the measurement error is large once the temperature variation exceeds several degrees.In this study,a new cross-hotwire calibration method was proposed,and the temperature correction was implicitly considered.Experimental studies were performed to validate the proposed method.The results show that:1)when the temperature variation was less than 4℃,no obvious difference was observed between the present method and Brunn’s method;2)when the temperature variation was larger than 4℃,the accuracy of the present method was more accurate than Brunn’s method. |
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| Keywords: | cross hotwire temperature correction calibration method |
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