Author: Jack N. Nielsen Publisher: ISBN: Category : Aerodynamics, Supersonic Languages : en Pages : 63
Book Description
An exact theoretical method is developed that permits the determination of the pressure field of a wing-body combination having a circular body and wings with supersonic leading and trailing edges. Detailed calculations are performed for the case of a rectangular wing or all-movable control surface on a body at zero angle of attack. Design charts are presented showing the effect of interference on the lift and center-of-pressure position of the wings. The physical basis of the interference is discussed.
Author: Jack N. Nielsen Publisher: ISBN: Category : Aeronautics Languages : en Pages : 82
Book Description
The wing-body interference theory of NACA TN 2677 applied to symmetrical wings in combination with quasi-cylindrical bodies permits the direct calculation of pressure-distribution changes produced by body shape changes. This theory is used to determine the relative magnitued of the wave-drag reduction produced by changes in cylinder cross-sectional area and that produced changes in cross-sectional shape (without change in area). The body distortion is expressed as a Fourier series, and an integral equation is derived for the body shape for minimum drag for each Fourier component. Thus the wave-drag reductions for the various Fourier harmonics are independent and additive.
Author: Daniel Friedman Publisher: ISBN: Category : Aerodynamics Languages : en Pages : 804
Book Description
An experimental investigation was conducted in order to determine the performance of a 90 degree cascade diffusing bend with an area ratio of 1.45:1 and a 19-inch square inlet with several inlet-boundary-layer shapes and thicknesses. The maximum mean inlet Mach number was 0.41 and the corresponding airfoil Reynolds number was 950,000. The experimental results seem to indicate that, when the duct configuration requires a bend, a certain amount of diffusion can be obtained without an appreciable rise in the total-pressure losses. If length is important, this configuration requires much less space than the usual diffuser-bend combination.
Author: Jack N. Nielsen
Author: Jack N. Nielsen
Author: United States. National Advisory Committee for Aeronautics
Author: Harry Edward Bailey
Author: Benjamin H. Beam
Author: Ross B. Robinson
Author: 
Author: Daniel Friedman
Author: Ralph L. Carmichael
Author: S. S. Chin