Aerodynamic Interference Between Stores
Aerodynamic Interference Between Stores

Author:

Publisher:

Published: 1992

Total Pages: 0

ISBN-13:

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Five tasks were initiated to study the aerodynamic interference between stores and aircraft. Both viscous and inviscid calculations were made. Steady state interference calculations matched well with experimental results and with other computational results. Unsteady time-accurate inviscid results showed the feasibility of using the Chimera scheme to simulate store separation. Free-fall calculations were made, demonstrating the ability to compute the new position of the store from the aerodynamic forces and moments on the store after its release from the aircraft. CHIMERA SCHEME, VISCOUS INTERACTIONS, AIRCRAFT STORES.

Aerodynamic Interference Between a Wing and a Slender Cylindrical Store
Aerodynamic Interference Between a Wing and a Slender Cylindrical Store

Author: Paul M. Sullivan

Publisher:

Published: 1971

Total Pages: 89

ISBN-13:

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Aerodynamic interference between an aircraft and a store carried beneath its wing is investigated using the simplified physical model of a uniform wing of infinite span and a slender body of revolution positioned beneath the wing. The wing is represented by a vortex filament, the store by a distribution of sources and doublets along its axis of revolution, and potential flow is presumed to exist. The aerodynamic forces acting on the store while it is attached to the aircraft are computed using this model. The trajectory that the store follows after it is released is studied for mass, initial position relative to the wing, and initial angle of attack. If a store is symmetric and homogeneous, it appears to be unstable after release, and rapidly violates the small angle assumptions of the study. Several trajectories are computed, and show that the aerodynamic loads can be large enough to propel a store of considerable mass into the ai craft that released it.

Aerodynamic Interference Between a Wing and Store
Aerodynamic Interference Between a Wing and Store

Author: Charles L. Turner

Publisher:

Published: 1972

Total Pages: 72

ISBN-13:

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Simplified wing and store models are used to determine the aerodynamic interference effects between an aircraft and a store carried beneath its wing. Inviscid flow characteristics are calculated and the results compared to an experimental wind tunnel study. The resulting vertical forces are comparable to those from the wind tunnel study when modeling the wing with a single horseshoe vortex. The remaining forces and moments are not predicted accurately. Methods for correcting the differences are suggested. Modeling the wing with multiple horseshoe vortices changes the side force values to values comparable to those from the wind tunnel study. This indicates that the method can be extended to correct the other forces and moments to more realistic values. (Author).

Aerodynamic Interference Between an Aircraft and Wing Store
Aerodynamic Interference Between an Aircraft and Wing Store

Author: Larry N. Looney

Publisher:

Published: 1973

Total Pages: 110

ISBN-13:

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Aerodynamic interference between an aircraft and wing store is studied by the use of analytical wing, fuselage, and store models. Inviscid flow is assumed and the Gothert transformation is used to correct for compressibility. An elliptic wing is represented by a bound vortex followed by a trailing vortex sheet. The fuselage and store are assumed to be slender bodies and modeled by a series of sources and doublets along their axis of revolution. Aerodynamic interference of the aircraft model is studied by observing the store in captive and free flight modes in the vicinity of the wing and fuselage models. The aerodynamic forces and moments experienced by the store as well as store trajectories are computed. Comparisons are made of store reactions (motion and trajectory) to only the wing model and to the wing and fuselage models combined. (Author).