Download or read book A Water Tunnel Flow Visualization Study of the Vortex Flow Structures on the F a 18 Aircraft written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-12 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vortex flow structures occurring on the F/A-18 aircraft at high angles of attack were studied. A water tunnel was used to gather flow visualization data on the forebody vortex and the wing leading edge extension vortex. The longitudinal location of breakdown of the leading edge vortex was found to be consistently dependent on the angle of attack. Other parameters such as Reynolds number, model scale, and model fidelity had little influence on the overall behavior of the flow structures studied. The lateral location of the forebody vortex system was greatly influenced by changes in the angle of sideslip. Strong interactions can occur between the leading edge extension vortex and the forebody vortex. Close attention was paid to vortex induced flows on various airframe components of the F/A-18. Reynolds number and angle of attack greatly affected the swirling intensity, and therefore the strength of the studied vortices. Water tunnel results on the F/A-18 correlated well with those obtained in similar studies at both full and sub scale levels. The water tunnel can provide, under certain conditions, good simulations of realistic flows in full scale configurations. Sandlin, Doral R. and Ramirez, Edgar J. Unspecified Center FLOW DISTRIBUTION; FLOW VISUALIZATION; HYDRAULIC TEST TUNNELS; LEADING EDGES; VORTICES; WING PROFILES; AIRFRAMES; ANGLE OF ATTACK; FOREBODIES; REYNOLDS NUMBER; SCALE MODELS; SIDESLIP; SWIRLING...
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Download or read book Wind Tunnel Investigation of Vortex Flows on F A 18 Configuration at Subsonic Through Transonic Speed written by and published by . This book was released on 1991 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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