Accession Number:

ADA280151

Title:

An Analytical Study of the Effects of Jets Located More Than One Jet Diameter Above a Wing at Subsonic Speeds

Descriptive Note:

Technical memo.

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER

Personal Author(s):

• Putnam, Lawrence E.

Report Date:

1974-05-01

Pagination or Media Count:

50.0

Abstract:

A procedure has been developed to calculate the effects of blowing two jets over a swept tapered wing at low subsonic speeds. The algorithm used is based on a vortex lattice representation of the wing lifting surface and a line sink-source distribution to simulate the effects of the jet exhaust on the wing lift and drag. The method is limited to those cases where the jet exhaust does not intersect or wash the wing. The predictions of this relatively simple procedure are in remarkably good agreement with experimentally measured interference lift and interference induced drag. Upper-surface blowing, Aerodynamics, Interference lift, Interference drag, Swept wings, Jet effects, Tapered wings, Subsonic flow.

Descriptors:

• *VELOCITY
• *DIAMETERS
• *SUBSONIC FLOW
• *JET FLOW
• *SWEPT WINGS
• *AERODYNAMICS
• ALGORITHMS
• DISTRIBUTION
• JET ENGINES
• DRAG
• LIFT
• LIFTING SURFACES
• WINGS
• FLOW
• INTERFERENCE
• SURFACES
• VORTICES
• PREDICTIONS
• SIMULATION

Subject Categories:

• Aircraft
• Numerical Mathematics
• Fluid Mechanics
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE