Books by "Alberta Y. Alksne"
3 books found
Theoretical Pressure Distributions on Wings of Finite Span at Zero Incidence for Mach Numbers Near 1
by Alberta Y. Alksne, John R. Spreiter
1961
A method employed heretofore by the authors to obtain approximate solutions of the transonic flow equation for plane and axisymmetric flow is extended to give reasonable results for wings of finite span, consistent with the known properties of transonic flows. In this method the partial differential equation appropriate to the study of transonic flow is replaced by a nonlinear ordinary differential equation which can be solved by numerical methods. Asymptotic forms of this differential equation are given for very high and very low aspect ratios and analytic results are obtained for certain special cases. Numerical results, calculated by use of electronic computing machines, are given in the form of pressure distribution and pressure drag for two profile shapes, wedge and circular arc, for wings of rectangular plan form. The range of aspect ratios covered extends effectively from zero to infinity and agreement with the asymptotic results is shown at both limits.
Torsional Stiffness of Thin-walled Shells Having Reinforcing Cores and Rectangular, Triangular, Or Diamond Cross Section
by Alberta Y. Alksne, George J. Nothwang, Harvey G. McComb, Henry H. Heyson, John H. Povolny, Keith C. Harder, Max A. Heaslet, Mitchel H. Bertram, Rinaldo J. Brun, W. E. Moeckel, United States. National Advisory Committee for Aeronautics, E. B. Klunker, Fred W. Steffen, John R. Spreiter, S. Katzoff, Jack G. McArdle
1957
The Effect of a Ring Current on the Boundary of the Geomagnetic Field in a Steady Solar Wind
by John R. Spreiter, Alberta Y. Alksne
1963
Approximate solutions are given for the shape of the boundary separating a steady neutral stream of ionized solar corpuscles from the combined magnetic fields of a three-dimensional dipole and an equatorial ring current. Results are presented for the traces of the boundary in the geomagnetic meridian plane containing the sun-earth line for several orientations of the latter relative to the dipole axis, and for the trace of the boundary in the geomagnetic equatorial plane for the case in which the dipole axis is normal to the sun-earth line. It is found that the presence of a ring current having values for the diameter and strength of the order proposed to explain in the magnetometer data from Pioneer I and Pioneer V has the effect of greatly increasing the size, as well as altering the form, of the region within which the geomagnetic field is confined.