Flight Validation of a Pulsed Smoke Flow Visualization System
Title | Flight Validation of a Pulsed Smoke Flow Visualization System PDF eBook |
Author | National Aeronautics and Space Administration (NASA) |
Publisher | Createspace Independent Publishing Platform |
Pages | 50 |
Release | 2018-07-03 |
Genre | |
ISBN | 9781722241902 |
A flow visualization scheme, designed to measure vortex fluid dynamics on research aircraft, was validated in flight. Strake vortex trajectories and axial core velocities were determined using pulsed smoke, high-speed video images, and semiautomated image edge detection hardware and software. Smoke was pulsed by using a fast-acting three-way valve. After being redesigned because of repeatedly jamming in flight, the valve shuttle operated flawlessly during the last two tests. A 25-percent scale, Gothic strake was used to generate vortex over the wing of a GA-7 Cougar and was operated at a local angle of attack of 22 degrees and Reynolds number of approximately 7.8 x 10(exp 5)/ft. Maximum axial velocities measured in the vortex core were between 1.75 and 1.95 times the freestream velocity. Analysis of the pulsed smoke system's affect on forebody vortices indicates that the system may reorient the forebody vortex system; however, blowing momentum coefficients normally used will have no appreciable affect on the leading-edge extension vortex system. It is recommended that a similar pulsed smoke system be installed on the F/A-18 High Angle Research Vehicle and that this approach be used to analyze vortex core dynamics during the remainder of its high-angle-of-attack research flights. Ward, Donald T. and Dorsett, Kenneth M. Unspecified Center NCC2-742; RTOP 533-02-35...
Flight Validation of a Pulsed Smoke Flow Visualization System
Title | Flight Validation of a Pulsed Smoke Flow Visualization System PDF eBook |
Author | |
Publisher | |
Pages | 52 |
Release | 1993 |
Genre | |
ISBN |
Scientific and Technical Aerospace Reports
Title | Scientific and Technical Aerospace Reports PDF eBook |
Author | |
Publisher | |
Pages | 702 |
Release | 1995 |
Genre | Aeronautics |
ISBN |
Monthly Catalogue, United States Public Documents
Title | Monthly Catalogue, United States Public Documents PDF eBook |
Author | |
Publisher | |
Pages | 750 |
Release | 1994-11 |
Genre | Government publications |
ISBN |
Monthly Catalog of United States Government Publications
Title | Monthly Catalog of United States Government Publications PDF eBook |
Author | |
Publisher | |
Pages | |
Release | 1994 |
Genre | Government publications |
ISBN |
NASA SP.
Title | NASA SP. PDF eBook |
Author | |
Publisher | |
Pages | 360 |
Release | 1993 |
Genre | Aeronautics |
ISBN |
Aeronautical Engineering
Title | Aeronautical Engineering PDF eBook |
Author | |
Publisher | |
Pages | 932 |
Release | 1993 |
Genre | Aeronautics |
ISBN |
A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).