Download or read book Tunnel wall Effects Associated with Vtol stol Model Testing written by R. E. Kuhn and published by . This book was released on 1959 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind-tunnel investigations of VTOL and STOL airplane models involve configurations in which a large amount of power is being used to generate part of the lift through the medium of propeller slipstreams or jet exhausts directed downward at large angles to the free-stream direction. For many configurations the propellers or jet exhausts are arranged, for example, as in the jet flap, to cover the entire span of the wing and thus to assist the wind in its natural process of producing so-called 'circulation' lift. This arrangement results in the streamlines in the vicinity of the wing also being turned through large angles to the free-stream direction of flow. The presence of the tunnel walls, however, imposes the conditions that the streamlines at the tunnel walls must be parallel to the free stream. Thus, the problem of tunnel-wall effects in VTOL-STOL model testing is similar to that associated with conventional model testing but differs greatly in degree. Experience has shown that, in addition to these usual tunnel-wall effects, flow separation on the model can also be induced by the tunnel walls. The experiences of the Langley Research Center of N.A.S.A. related to these problems in closed-throat wind tunnels are reviewed. (Author).
Download or read book Wind tunnel wall effects in v stol model testing written by George B. Matthews and published by . This book was released on 1968 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind tunnel Testing of VTOL and STOL Aircraft written by and published by . This book was released on 1978 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind Tunnel Wall Interference in V STOL and High Lift Testing written by Marie H. Tuttle and published by . This book was released on 1986 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Several Slotted Wind Tunnel Wall Configurations with a High Disk Loading V STOL Model written by Travis W. Binion and published by . This book was released on 1971 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigation reported herein is the experimental portion of a unified theoretical and experimental search for a slotted wind tunnel wall configuration with minimal interference for conventional and V/STOL models. It is shown that theory and experiment are in excellent agreement for the classical case provided an appropriate expression is used to relate the wall geometry to the boundary condition. Classical data correction equations are not appropriate for the V/STOL case, however. An additional term, not predicted by theory, is needed to account for changes in the jet wake. Geometric parameters which influence the wall interference quantities are indicated. Wall configurations are shown which will produce interference-free force data to a jet-to-free-stream velocity ratio of 4.5. (Author).
Download or read book Experimental Study of Wind tunnel Wall Effects and Wall Corrections for a General research V STOL Tilt wing Model with Flap written by Kalman J. Grunwald and published by . This book was released on 1965 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind Tunnel Wall Interference in V STOL and High Lift Testing A Selected Annotated Bibliography written by Marie H. Tuttle and published by . This book was released on 1986 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Linearized Theory of Wind tunnel Jet boundary Corrections and Ground Effect for Vtol Stol Aircraft written by Harry H. Heyson and published by . This book was released on 1962 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical Study of Conditions Limiting V STOL Testing in Wind Tunnels with Solid Floor written by Harry H. Heyson and published by . This book was released on 1970 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Under sufficiently large wake deflections, the forward portion of the wake is found to flow forward along the floor leading to a vortex pattern which results in Rae's limits (Journal of Aircraft, May-June 1967). Although wind-tunnel data cannot normally be corrected successfully beyond these limits, it may be possible to obtain ground-effect data for conditions more severe than those implied by Rae.
Download or read book The Effect of Wind tunnel Wall Interference on the Performance of a Fan in wing VTOL Model written by Harry H. Heyson and published by . This book was released on 1974 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind tunnel wall Effects and Scale Effects on a VTOL Configuration with a Fan Mounted in the Fuselage written by Edwin E. Davenport and published by . This book was released on 1965 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Study of Operational Problems and Techniques in Wind Tunnel Testing of Vtol and Stol Vehicles written by William H Rae (Jr) and published by . This book was released on 1965 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purpose of this investigation is to develop an economical method of experimentally checking the effect of wind tunnel wall constraints on rotors, ducted fans, tilt props, and other methods of obtaining aircraft with V/STOL performance, by the use of inserts within a wind tunnel to simulate different size test sections. (Author).
Download or read book NASA Technical Note written by and published by . This book was released on 1973 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Report written by and published by . This book was released on 1971 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Correlation of Wind Tunnel and Flight Test Aerodynamic Data for Five V STOL Aircraft written by David H. Hickey and published by . This book was released on 1965 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The five aircraft tested represent a wide variety of V/STOL concepts. Correlation between the wind-tunnel and flight-test aerodynamic results is generally good when wind-tunnel wall corrections are omitted; in some cases wall corrections are shown to degrade the correlation. The aircraft and wind-tunnel geometry are related to model-tunnel sizing parameters and a VTOL lift parameter, in order to establish tentative sizing criteria for V/STOL wind-tunnel testing with small wall effects. The report is one of the series 515-522 of papers presented at the 27th meeting of the AGARD Flight Mechanics Panel, held 11-12 October 1965 in Rome, Italy. (Author).
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1986 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Publications Announcements with Indexes written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
