隨著科技進步，電子產品尺寸下降與功率提升，單位面積的熱密度也隨之提高，如何解熱成為熱管理產業重要的議題。熱管理中經常使用葉片風扇來實行強制對流增加熱傳效率；但葉片風扇面臨空間受限制、噪音、與機械動件可靠度等挑戰。因此，發展新型風扇是熱管理產業重要的目標。離子風扇具有結構簡單、無噪音、與體積小等特點，透過電暈放電機制而產生氣流，是熱管理方案中的新選擇。欲在熱管理中使用離子風扇，必須先得知性能曲線（PQ曲線）是否滿足熱管理的需求。其中，熱管理產業中常用的性能曲線大多沒有考慮入風口遮蔽效應。然而，已經有研究證實，遮蔽效應會顯著地影響葉片風扇的性能曲線。本研究針對線對圓柱幾何形式離子風扇，在不同冠狀電極數目、不同收集電極數目、不同尺寸、不同入風口條件（有/無遮蔽效應）、與不同供電方式（定冠狀電壓/定冠狀電流）下的靜壓與流量進行全因子參數實驗。實驗是使用符合標準風機測試規範（Air Movement and Control Association, AMCA 210）的流動平台來量測離子風扇的靜壓與流量，並透過量測離子風扇之冠狀電壓與冠狀電流，與模擬離子化區域來探討其電場強度。結果顯示，在相同冠狀電壓下，大尺寸與冠狀電極數目少的離子風扇具有較高的冠狀電流、較大離子化區域、較大靜壓、與較高流量。變異數分析指出，尺寸與冠狀電極數目是二個最顯著影響靜壓與流量的參數。結果也顯示，在定冠狀電壓下，遮蔽效應降低約10%離子風扇的最大靜壓與降低約52%的最大流量；然而，在定冠狀電流下，遮蔽效應不會影響離子風扇的最大靜壓，僅會降低約30%的最大流量。另外，由改變冠狀電極數目而造成靜壓與流量的變異在定冠狀電壓下會大於定冠狀電流。

With the advance of technology, the decreasing size of electronics and the increasing power implies that the heat density increases. Thermal management becomes essential for thermal industries. Forced convection is the most common thermal management practice in the industry and is usually implemented by, at least, the airflow-generating devices such as rotary fans to enhance thermal transfer efficiency. However, rotary fans encounter challenges such as limitation of size, noise issue, and reliability issue due to mechanical moving parts. Developing an emerging fan is getting its importance. Electrohydrodynamic (EHD) pumps, operating based on corona discharge, have characteristics of simple configurations (require only electrodes), noise-less, and small form factors, provide an alternative option for thermal management. In order to implement EHD pumps in thermal management, the performance curves (PQ curves) have to be evaluated in advance. Moreover, the inlet conditions have to be considered as the blockage effect degrades the performance of rotary fans. This full factorial study investigates the static pressure and the flow rate of wire-to-rods EHD pumps under different number of corona electrodes, different number of collector electrodes, different inlet conditions (with or without blockage effect), and different electrical driving conditions. The experimental setup for measuring the static pressure and the flow rate is the flow bench that meets the industrial standard AMCA 210. The corona current-corona voltage characteristics are measured and the ionization regions are numerically simulated. Results show, under constant corona voltage, EHD pumps with large size and less number of corona electrodes have high corona current, large ionization regions, high static pressure and high flow rate. The analysis of variance indicates that the size and the number of corona current are the two most significant factors for the static pressure and the flow rate. Results also show, under constant corona voltage, blockage effect degrades 10% static pressure and 52% flow rate. However, for the constant corona current, the blockage effect does not degrade the static pressure. It reduces only the maximum flow rate by 30%. Moreover, by applying either constant corona voltage or constant corona current onto the same EHD pumps, the variance of the maximum static pressure and the maximum flow rate cause by changing the number of corona electrodes under constant corona voltage is larger than that of the constant corona current.

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