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Computational methods for aerodynamic shape design 总被引:1,自引:0,他引:1
K. F. C. Yiu 《Mathematical and Computer Modelling》1994,20(12):3-29
In this paper, various computational methods for shape design in aerodynamics are reviewed. A classification system based on the mathematical structure of the methods is introduced. The fundamental ideas of different formulations are discussed, and the algorithms are described. The advantages and well-known disadvantages of different methods are also briefly discussed. 相似文献
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Kah Bin Lim Wee Beng Tay 《Acta Mechanica Sinica》2010,26(2):191-207
The objective of this project is to improve the performance of the efficiency, thrust and lift of flapping wings in tandem arrangement. This research investigates the effect of the arrangement of the airfoils in tandem on the performance of the airfoils by varying the phase difference and distance between the airfoils. Three flapping configurations from an earlier phase of a research which gives high efficiency, thrust and lift are used in the tandem simulation. It is found all the different flapping configurations show improvement in the efficiency, thrust or lift when the distance between the two airfoils and the phase angle between the heaving positions of the two airfoils are optimal. The average thrust coefficient of the tandem arrangement managed to attain more than twice that of the single one (4.84 vs. 2.05). On the other hand, the average lift coefficient of the tandem arrangement also increased to 4.59, as compared to the original single airfoil value of 3.04. All these results obtained will aid in the design of a better ornithopter with tandem wing arrangement. 相似文献
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