本論文主要利用風洞實驗方法，以矩型平板機翼重疊交錯配置成多層翼微飛行器(MAV)模型，探討其在低雷諾數下的空氣動力特性，及機翼最佳交錯配置方式。選用之參考面積為多層翼之翼面積總合，共製作十六組不同重疊比及間距比之平板多層翼模型，以及一組展弦比AR=1.6之平板單翼模型，於低雷諾數下測量升力及阻力值。為了進一步了解多層翼間的流場結構，也利用低速煙洞觀察多層翼於低雷諾數下之二維流場現象。實驗結果顯示多層翼模型之失速攻角均高於20度，最大升力係數也高於相同翼面積之單翼，且在失速攻角前後之升力變化緩和。根據最大升阻比之結果，可知多層翼在低攻角範圍之性能並不會優於單翼，但適當的翼面配置仍可使其性能與單翼相當。由二維低速煙洞實驗觀察平板多層翼之二維流場結構，可以了解多層翼具有高失速攻角的原因。當攻角較大，上層機翼上表面氣流已嚴重分離時，仍可維持下層機翼間之氣流沿著翼表面流動，因此而能夠持續產生升力。歸納實驗之結果，顯示重疊比對於高攻角升力之提升有較為直接的關聯。而最佳的多層翼交錯配置參數值應為重疊比O=0 、間距比G=0.48，可以具有與單翼相當之低攻角性能，且具有較佳的高攻角性能。

　　This thesis is intended to investigate the aerodynamic characteristics of the flat-plate cascade-wing Micro Aerial Vehicle (MAV) at low Reynolds number by wind-tunnel testing and to determine the optimal staggered configuration of the wings for the MAV. There were 16 cascade-wing models of flat-plate airfoil with different overlap ratios and gap ratios along with a monoplane of AR=1.6 tested at the Reynolds number of 8.8×104 for comparison. The lift and drag forces were measured and normalized based on the total area of the cascade wings. In order to understand the flow structure behavior around the cascade wings, the flow visualization was performed as well in a smoke tunnel. Results indicate that the stall angles of attack (AOA) for all the cascade-wing models tested were all exceeding 20 degrees and the corresponding maximum lift coefficients were larger than that of the monoplane model with the same wing area. The values of lift coefficients vary mildly near the stall angles. According to the lift-to-drag ratio calculation, the performance of cascade-wing models is usually inferior to the monoplane, but it may be very close when the arrangements of cascade wings are adequate. It was observed in flow visualization that the flow can be attached to the surfaces of lower wing when the flow had separated from the upper wing at high AOA; hence the cascade wing can maintain its lift force at even higher AOA. It is induced that the overlap ratio has much influence on the lift at high AOA. The optimum values of configuration parameters are overlap ratio O=0 and gap ratio G=0.48.

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