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On the application of Mathieu functions in the theory of subsonic compressible flow past oscillating airfoils

On the application of Mathieu functions in the theory of subsonic compressible flow past oscillating airfoils

Date: May 1, 1951
Creator: Reissner, Eric
Description: None
Contributing Partner: UNT Libraries Government Documents Department
On the Application of the Energy Method to Stability Problems

On the Application of the Energy Method to Stability Problems

Date: October 1, 1947
Creator: Marguerre, Karl
Description: Since stability problems have come into the field of vision of engineers, energy methods have proved to be one of the most powerful aids in mastering them. For finding the especially interesting critical loads special procedures have evolved that depart somewhat from those customary in the usual elasticity theory. A clarification of the connections seemed desirable,especially with regard to the post-critical region, for the treatment of which these special methods are not suited as they are. The present investigation discusses this question-complex (made important by shell construction in aircraft) especially in the classical example of the Euler strut, because in this case - since the basic features are not hidden by difficulties of a mathematical nature - the problem is especially clear. The present treatment differs from that appearing in the Z.f.a.M.M. (1938) under the title "Uber die Behandlung von Stabilittatsproblemen mit Hilfe der energetischen Methode" in that, in order to work out the basic ideas still more clearly,it dispenses with the investigation of behavior at large deflections and of the elastic foundation;in its place the present version gives an elaboration of the 6th section and (in its 7 th and 8th secs.)a new example that shows the applicability of ...
Contributing Partner: UNT Libraries Government Documents Department
On the application of transonic similarity rules

On the application of transonic similarity rules

Date: June 1, 1952
Creator: Spreiter, John R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
On the application of transonic similarity rules to wings of finite span

On the application of transonic similarity rules to wings of finite span

Date: January 1, 1953
Creator: Spreiter, John R
Description: The transonic aerodynamic characteristics of wings of finite span are discussed from the point of view of a unified small perturbation theory for subsonic, transonic, and supersonic flows about thin wings. This approach avoids certain ambiguities which appear if one studies transonic flows by means of equations derived under the more restrictive assumption that the local velocities are everywhere close to sonic velocity. The relation between the two methods of analysis of transonic flow is examined, the similarity rules and known solutions of transonic flow theory are reviewed, and the asymptotic behavior of the lift, drag, and pitching-moment characteristics of wings of large and small aspect ratio is discussed. It is shown that certain methods of data presentation are advantageous for the effective display of these characteristics.
Contributing Partner: UNT Libraries Government Documents Department
On the attached curved shock in front of a sharp-nosed axially symmetrical body placed in a uniform stream

On the attached curved shock in front of a sharp-nosed axially symmetrical body placed in a uniform stream

Date: October 1, 1951
Creator: Shen, S F & Lin, C C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
On the buckling of bars and plates in the plastic range.  Part II

On the buckling of bars and plates in the plastic range. Part II

Date: March 1, 1956
Creator: Benthem, J P
Description: A review is made of existing literature concerning comparison with experiment of various theoretical formulas for buckling of plates in the plastic region. The significance and relative merits of various theories are discussed.
Contributing Partner: UNT Libraries Government Documents Department
On the calculation of flow about objects traveling at high supersonic speeds

On the calculation of flow about objects traveling at high supersonic speeds

Date: October 1, 1952
Creator: Eggers, A J
Description: A procedure for calculating three-dimensional steady and nonsteady supersonic flows with the method of characteristics is developed and discussed. An approximate method is deduced from the characteristics method and shown to be of practical value at high supersonic speeds.
Contributing Partner: UNT Libraries Government Documents Department
On the calculation of flow past an infinite screen of thin airfoils

On the calculation of flow past an infinite screen of thin airfoils

Date: February 1, 1941
Creator: Pistolesi, E
Description: This report deals with the flow past an infinite screen of thin airfoil (two-dimensional problem). The vortex distribution across the profile is established with appropriate expansion in series and the velocity distribution lift, moment, and profile shape deduced. Inversely, the distribution is deduced from the vorticity. The method is the extension of the Birnbaum-Glauert method for the isolated wing.
Contributing Partner: UNT Libraries Government Documents Department
On the Calculation of Shallow Shells

On the Calculation of Shallow Shells

Date: December 1, 1956
Creator: Ambartsumyan, S. A.
Description: This paper considers a sufficiently thin shallow shell of nonzero Gaussian curvature. It also presents a system of symmetrically constructed differential equations, constructed by the mixed method through the stress function and the displpacement function.
Contributing Partner: UNT Libraries Government Documents Department
On the calculation of the 1 (center dot) P oscillating aerodynamic loads on single-rotation propellers in pitch on tractor airplanes

On the calculation of the 1 (center dot) P oscillating aerodynamic loads on single-rotation propellers in pitch on tractor airplanes

Date: May 1, 1955
Creator: Rogallo, Vernon L & Yaggy, Paul F
Description: None
Contributing Partner: UNT Libraries Government Documents Department