The Calculation of Downwash Behind Supersonic Wings with an Application to Triangular Plan Forms

The Calculation of Downwash Behind Supersonic Wings with an Application to Triangular Plan Forms
Author: Maxwell Alfred Heaslet
Publisher:
Total Pages: 52
Release: 1948
Genre: Aerodynamics, Supersonic
ISBN:

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A method is developed, consistent with the assumptions of small perturbation theory, which provides a means of determining for a known load distribution, the downwash behind a wing in supersonic flow. THe analysis is based upon the use of supersonic doublets which are distributed over the plan form and wake of the wing in a manner determined from the wing loading.

Damping-in-roll Calculations for Slender Swept-back Wings and Slender Wing-body Combinations

Damping-in-roll Calculations for Slender Swept-back Wings and Slender Wing-body Combinations
Author: Harvard Lomax
Publisher:
Total Pages: 38
Release: 1949
Genre: Aerofoils
ISBN:

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The damping-in-roll parameter C(iota)(p) is calculated theoretically for triangular wings on cylindrical bodies and for a class of wings with sweptback plan forms. The analysis is based on the usual assumptions of linearized compressible-flow theory together with the added restrictions that at the free-stream Mach number M(omicron) the product of lM(omicron)(2) and the streamwise velocity gradient is small.

Summary and Analysis of Horizontal-tail Contribution to Longitudinal Stability of Swept-wing Airplanes at Low Speeds

Summary and Analysis of Horizontal-tail Contribution to Longitudinal Stability of Swept-wing Airplanes at Low Speeds
Author: Robert H. Neely
Publisher:
Total Pages: 100
Release: 1959
Genre: Aeronautics
ISBN:

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Air-flow characteristics behind wings and wing-body combinations are described and are related to the downwash at specific tail locations for unseparated and separated flow conditions. The effects of various parameters and control devices on the air-flow characteristics and tail contribution are analyzed and demonstrated. An attempt has been made to summarize certain data in a form useful for design. The experimental data herein were obtained mostly at Reynolds numbers greater than 4 x 105 and at Mach numbers less than 0.25.

Theoretical and Experimental Investigation of the Subsonic-flow Fields Beneath Swept and Unswept Wings with Tails of Vortex-induced Velocities

Theoretical and Experimental Investigation of the Subsonic-flow Fields Beneath Swept and Unswept Wings with Tails of Vortex-induced Velocities
Author: William J. Alford
Publisher:
Total Pages: 100
Release: 1956
Genre: Air flow
ISBN:

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The flow-field characteristics beneath swept and unswept wings as determined by potential-flow theory are compared with the experimentally determined flow fields beneath swept and unswept wing-fuselage combinations. The potential-flow theory utilized considered both the spanwise and chordwise distributions of vorticity as well as the wing-thickness effects. The perturbation velocities induced by a unit horseshoe vortex are included in tabular form.

Report

Report
Author: United States. National Advisory Committee for Aeronautics
Publisher:
Total Pages: 58
Release: 1957
Genre: Aeronautics
ISBN:

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