超声波测风换能器对风速的影响研究
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TN206

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江苏省自然科学基金(BK20161536)、江苏省第十一批“六大人才高峰”高层次人才项目、江苏省333高层次人才培养工程、江苏省高校优势学科II期建设工程项目资助


Study on the influence of ultrasonic wind transducer on wind speed
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    摘要:

    利用流体力学软件Fluent对两种超声波测风换能器在不同风速下进行数值模拟,得到速度云图以及测风路径上风速随时间步长的变化曲线,分析对比了两种换能器对风速的影响。其次以圆柱形换能器为研究对象,在不同风速风向下,仿真了测风路径上风速随风向的变化情况,得到了测风路径上风速随风向变化曲线图和测风路径风速的x分量速度随风向的变化曲线与标准风速x轴分量速度随风向的变化曲线对比图。从图中可以清晰地看出,不同风向下超声波换能器对风速的影响程度。通过仿真结果可以总结出,采用流线形形状的子弹头型超声波换能器在高风速下较圆柱形换能器对风速的影响更小。除此之外,在设计超声波测风仪时超声波测风路径应当避免平行风,即测风路径应该与风向存在一定的角度,且该角度应当在60°左右。

    Abstract:

    Using the fluid mechanics software fluent to numerically simulate the two ultrasonic wind transducers at different wind speed, the velocity nephogram, and the curve of the wind speed with time step on the centerline of the transducer has been obtained. And the effects of the two transducers on wind speed are analyzed and compared. Secondly, the rectangular transducer is taken as the research object. At different wind speeds and different wind directions, the variation of wind speed with wind direction on the wind path is simulated. The wind speed curve along the wind direction and the comparison chart of the curve of x component velocity with wind direction and the variation curve of x axis component velocity with wind direction of standard wind speed has been obtained. From these diagrams, we can see the influence of ultrasonic transducer on wind speed under different wind directions. From the simulation results, it can be concluded that the streamlined shape of the bullet-type ultrasonic transducer has less influence on the wind speed than the cylindrical transducer at high wind speed. In addition, the ultrasonic wind path should avoid parallel wind when designing the ultrasonic anemometer, that is, the path of wind measurement should be at an angle to the wind direction, and the angle should be about 60°.

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任晓晔,陈晓,郭妍.超声波测风换能器对风速的影响研究[J].电子测量技术,2019,42(7):118-124

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  • 在线发布日期: 2021-08-09
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