本研究利用圓柱渦流溢放現象開發一款適用於大氣紊流場之渦流式風速感測器，大氣風場之風向為非定常變化，故必須在圓柱上尋找能夠分析任意來流風向之區域位置。論文架構分為兩部分，首先使用數值模擬的方法，評估出在圓柱上需要設置三開孔三訊號源或四開孔兩訊號源即能夠分析出360˚任意來流之風速。第二部分為風洞實驗，利用數值模擬分析出來之結果作為探討依據，若原始訊號濾波後其 值大於1，則判斷為可用來分析風速之訊號，在此整體結果四開孔比三開孔訊號品質佳；風向適應性中兩者皆能夠分析出任意風向之風速；最後在風向評估中以壓力訊號源之 ，粗略判斷風之來向，其中三開孔呈現結果同時段擷取訊號可能得到兩組風向位置，而四開孔可望能得知360˚風向，故四開孔風向解析度比三開孔高。綜合以上結果加上成本考量，四開孔兩訊號源只需要兩個壓力轉換器即能量測風速，故渦流式風速計選擇四開孔兩訊號源方式做為量測風速訊號之依據。

This thesis uses the vortex shedding phenomena for develop a new wind anemometer. This vortex wind anemometer has the advantages of simple cylindrical shape with long-term stability, well repeatability, low maintenance costs, and absence of moving parts. However, the development of the new vortex wind anemometer also has to face the challenges, including the non-stationary atmospheric turbulence field, the unknown wind direction. Therefore, one must consider the wind adaptability for the new vortex wind anemometer. To find the locations on the cylinder where signal can be analyzed is necessary. In this research, two research methods, CFD numerical simulation and wind tunnel experiments are used to study the new vortex wind anemometer. In the CFD numerical simulation, the assessment results are divided into “Three Holes” and “Four Holes” configurations on the cylinder surface. The “Three Holes” configuration is using pressure difference signals from three pressure holes on the cylinder surface, and the “Four Holes” configuration only using two signals on the cylinder surface, to analyze wind speed for different wind directions. In the wind tunnel experiment refer to the CFD result. After the raw signal transferring by filter process, if its SNR is higher than 1, deciding the raw signal is usable. The result shows that the Four Holes signal quality is better than “Three Holes” configuration. In other hand, the wind tunnel experiment presents that both “Three Holes” and “Four Holes” configurations of the new vortex wind anemometer can measure wind speed from any wind direction. One can also try to determine the wind direction according to pressure coefficient measurements from “Three Holes” and “Four Holes” configurations. The results find that the wind direction resolution of Four Holes is higher than Three Holes. Therefore, it is suggested use the “Four Holes” configuration for the new vortex anemometer in this stud.

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