Author: Jack N. NielsenPublisher:
ISBN:
Category :
Languages : en
Pages : 43
Book Description
Method for Estimating Lift Interference of Wing-body Combinations at Supersonic Speeds
Method for Estimating Pitching-moment Interference of Wing-body Combinations at Supersonic Speed
Author: George E. KaattariAn Integrated Approach to the Analysis and Design of Wings and Wing-body Combinations in Supersonic Flow
Author: Ralph L. CarmichaelPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 18
Book Description
A Method for Calculating the Lift and Center of Pressure of Wing-body-tail Combinations at Subsonic, Transonic, and Supersonic Speeds
Author: Jack Norman NielsenPublisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 132
Book Description
A Supersonic Area Rule and an Application to the Design of a Wing-body Combination with High Lift-drag Ratios
Author: Richard T. WhitcombPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 20
Book Description
Summary: As an extension of the transonic area rule, a concept for interrelating the wave drags of wing-body combinations at moderate supersonic speeds with axial developments of cross-sectional area has been derived. The wave drag of a combination at a given supersonic speed is related to a number of developments of cross-sectional areas as intersected by Mach planes. On the basis of this concept and other design procedures, a structurally feasible, swept-wing--indented-body combination has been designed to have relatively high maximum lift-drag ratios over a range of transonic and moderate supersonic Mach numbers. The wing of the combination has been designed to have reduced drag associated with lift and, when used with an indented body, to have low zero-lift wave drag. Experimental results have been obtained for this configuration at Mach numbers from 0.80 to 2.01. Maximum lift-drag ratios of approximately 14 and 9 were measured at Mach numbers of 1.15 and 1.41, respectively.
General Theory of Wave-drag Reduction for Combinations Employing Quasi-cylindrical Bodies with an Application to Swept-wing and Body Combinations
Author: Jack N. NielsenPublisher:
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.
Scientific and Technical Aerospace Reports
Author: Experimental Pressure Distributions Over Two Wing-body Combinations at Mach Number 1.9
Author: Barry MoskowitzPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 40
Book Description
Abstract: Pressure distributions on two wing-body combinations were obtained at Mach number of 1.9 to investigate wing-body interference. A rectangular wing, a triangular wing, and a cylindrical body having an ogive nose were investigated alone and in combination. Pressure distributions over the wing body combination compared favorable with theoretical calculations based primarily on a generalization of the method of Nielsen and Matteson, except at the root section of wings where boundary layer of body modified the flow.
Report
Author: United States. National Advisory Committee for AeronauticsPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 68
Book Description
Annual Report - National Advisory Committee for Aeronautics
Author: United States. National Advisory Committee for AeronauticsPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages :
Book Description
Includes the Committee's Technical reports no. 1-1058, reprinted in v. 1-37.