Arid
报告编号NACA-TR-362
来源IDNTRS_Document_ID: 19930091433
An extended theory of thin airfoils and its application to the biplane problem
Millikan, Clark B
英文摘要The report presents a new treatment, due essentially to von Karman, of the problem of the thin airfoil. The standard formulae for the angle of zero lift and zero moment are first developed and the analysis is then extended to give the effect of disturbing or interference velocities, corresponding to an arbitrary potential flow, which are superimposed on a normal rectilinear flow over the airfoil. An approximate method is presented for obtaining the velocities induced by a 2-dimensional airfoil at a point some distance away. In certain cases this method has considerable advantage over the simple "lifting line" procedure usually adopted. The interference effects for a 2-dimensional biplane are considered in the light of the previous analysis. The results of the earlier sections are then applied to the general problem of the interference effects for a 3-dimensional biplane, and formulae and charts are given which permit the characteristics of the individual wings of an arbitrary biplane without sweepback or dihedral to be calculated. In the final section the conclusions drawn from the application of the theory to a considerable number of special cases are discussed, and curves are given illustrating certain of these conclusions and serving as examples to indicate the nature of the agreement between the theory and experiment.
英文关键词THIN WINGS BIPLANES AERODYNAMIC INTERFERENCE COMPUTATION THEORIES EXPERIMENTATION COMPARISON
出版年1931
语种英语
国家美国
URLhttp://hdl.handle.net/2060/19930091433
资源类型科技报告
条目标识符http://119.78.100.177/qdio/handle/2XILL650/258224
推荐引用方式
GB/T 7714
Millikan, Clark B. An extended theory of thin airfoils and its application to the biplane problem,1931.
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