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A Study Of The Vortex Flow Over 76 40 Deg Double Delta Wing
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Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781729072707 Total Pages :40 pages Book Rating :4.0/5 (727 download)
Book Synopsis A Study of the Vortex Flow Over 76/40-Deg Double-Delta Wing by : National Aeronautics and Space Adm Nasa
Download or read book A Study of the Vortex Flow Over 76/40-Deg Double-Delta Wing written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-22 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A low-speed wind-tunnel study of the flow about a 76/40-deg double-delta wing is described for angles of attack ranging from -10 to 25 deg and Reynolds numbers ranging from 0.5 to 1.5 Million. The study was conducted to provide data for the purpose of understanding the vortical flow behavior and for validating Computational Fluid Dynamics methods. Flow visualization tests have provided insight into the effect of the angle of attack and Reynolds number of the vortex-dominated flow both on and off of the surface of the double-delta wing. Upper surface pressure recordings from pressure orifices and Pressure Sensitive Paint have provided data on the pressures induced by the vortices. Flowfield surveys were carried out at an angle of attack of 10 deg by using a thin 5-hole probe. Numerical solutions of the compressible thin-layer Navier-Stokes equations were conducted and compared to the experimental data. Verhaagen, N. G. and Jenkins, L. N. and Kern, S. B. and Washburn, A. E. Langley Research Center NAS1-19480; RTOP 505-90-52-01...
Book Synopsis A Study of the Vortex Flow Over 76/40-deg Double-delta Wing by : N. G. Verhaagen
Download or read book A Study of the Vortex Flow Over 76/40-deg Double-delta Wing written by N. G. Verhaagen and published by . This book was released on 1995 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Vortex Flow Over 76/40-degrees Double-delta Wing by : N. G. Verhaagen
Download or read book A Study of the Vortex Flow Over 76/40-degrees Double-delta Wing written by N. G. Verhaagen and published by . This book was released on 1995 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of the Vortex Flow Over Delta and Double-Delta Wings at Low Speed by : N. G. Verhaagen
Download or read book An Experimental Investigation of the Vortex Flow Over Delta and Double-Delta Wings at Low Speed written by N. G. Verhaagen and published by . This book was released on 1983 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wind-tunnel investigation was performed to study, by employing a laserlight-sheet and oil-flow visualization technique, the flow above and behind a sharp-edge 76 deg, delta wing and two sharp-edged double-delta wing models (76/60 and 76/40 deg., kink at midcord). In addition, balance measurements were performed to determine lift, drag and pitching moment. The tests were carried out for angles of attack from 5 to 25 deg. and at a free-stream velocity of 30 m/sec, corresponding to a Reynolds number of 1400000 x 10 to the 6th power, based on centerline chord. Above both double-delta wings a single-branched strake vortex is formed fed by vorticity from the strake leading edge. Downstream of the leading-edge kink a wing vortex is formed which is conjectured to be single-branched at about 5 deg, angle of attack and double branched at angles of 10 deg., an beyond. The flow pattern downstream of the trailing edge of the 76/60 deg. double-delta wing has been observed to be similar to that behind the delta wing. Above the 76/40 deg. double-delta wing breakdown of both the wing and strake vortices took place ahead of the trailing edge. (Author).
Book Synopsis A Visualisation Study of the Vortex Flow Around Double-delta Wings by : D. H. Thompson
Download or read book A Visualisation Study of the Vortex Flow Around Double-delta Wings written by D. H. Thompson and published by . This book was released on 1985 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: A family of double-delta wings with leading-edge sweep combinations of 80/80,80/7080/6080/50 and 80/40 deg. was tested in a small towing tank. The hydrogen bubble technique was used to visualize the vortex patterns above the wings over a range of Reynolds numbers (based on centerline chord) from 7000 to 100,000. The effects of variations in incidence and leading-edge kink angle were examined. Reynolds number and leading-edge cross-section shape were found to have significant effects on the vortex structure. Attempts to visualize details of the upper surface secondary vortex flows met with only partial success. Keywords Flow visualization, Vortices, Delta wings, Angle of incidence. (Australia).
Book Synopsis A Study of the Vortex Flow Over 76/40-DEG Double-Delta Wind Final Report, N.G. Verhaagen Et Al, ICASE, February 1995 by :
Download or read book A Study of the Vortex Flow Over 76/40-DEG Double-Delta Wind Final Report, N.G. Verhaagen Et Al, ICASE, February 1995 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Investigation of Vortex Flow Over a 76/60-deg Double-delta Wing by : J. E. J. Maseland
Download or read book Experimental and Numerical Investigation of Vortex Flow Over a 76/60-deg Double-delta Wing written by J. E. J. Maseland and published by . This book was released on 1992 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of Vortex-Tail Interaction on a 76/40 Degree Double-Delta Wing by :
Download or read book Experimental Investigation of Vortex-Tail Interaction on a 76/40 Degree Double-Delta Wing written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was conducted to quantify the vortex-tail interaction on a 76/40 degree double delta wing model. The effects of different fillets at the wing/strake juncture, tail span wise positions, and angles of attack were evaluated. The vertical tails were instrumented with 28 fast response pressure transducers. Pressure time histories and frequency power spectral densities were analyzed for 35 configurations. Angle of attack was varied from -2 to 40 degrees, tunnel dynamic pressure was 26.74 psf and Reynolds number was 1.3 million. The results show a strong dependence on fillet geometry, tail position, transducer measurement location, and angle of attack on the magnitude and frequency of the tail response to the vortex forcing. In addition, a low frequency pulse was found that contained tremendous energy.
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1995 with total page 1484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1995 with total page 1482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Springer Handbook of Experimental Fluid Mechanics by : Cameron Tropea
Download or read book Springer Handbook of Experimental Fluid Mechanics written by Cameron Tropea and published by Springer Science & Business Media. This book was released on 2007-10-09 with total page 1570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accompanying DVD-ROM contains ... "all chapters of the Springer Handbook."--Page 3 of cover.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721985562 Total Pages :322 pages Book Rating :4.9/5 (855 download)
Book Synopsis Wind Tunnel Application of a Pressure-Sensitive Paint Technique to a Double Delta Wing Model at Subsonic and Transonic Speeds by : National Aeronautics and Space Administration (NASA)
Download or read book Wind Tunnel Application of a Pressure-Sensitive Paint Technique to a Double Delta Wing Model at Subsonic and Transonic Speeds written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-27 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: A pressure-sensitive paint (PSP) technique was applied in a wind tunnel experiment in the NASA Langley Research Center 8-Foot Transonic Pressure Tunnel to study the effect of wing fillets on the global vortex induced surface static pressure field about a sharp leading-edge 76 deg./40 deg. double delta wing, or strake-wing, model at subsonic and transonic speeds. Global calibrations of the PSP were obtained at M(sub infinity) = 0.50, 0.70, 0.85, 0.95, and 1.20, a Reynolds number per unit length of 2.0 million, and angles of attack from 10 degrees to 20 degrees using an insitu method featuring the simultaneous acquisition of electronically scanned pressures (ESP) at discrete locations on the model. The mean error in the PSP measurements relative to the ESP data was approximately 2 percent or less at M(sub infinity) = 0.50 to 0.85 but increased to several percent at M(sub infinity) =0.95 and 1.20. The PSP pressure distributions and pseudo-colored, planform-view pressure maps clearly revealed the vortex-induced pressure signatures at all Mach numbers and angles of attack. Small fillets having parabolic or diamond planforms situated at the strake-wing intersection were respectively designed to manipulate the vortical flows by removing the leading-edge discontinuity or introducing additional discontinuities. The fillets caused global changes in the vortex-dominated surface pressure field that were effectively captured in the PSP measurements. The vortex surface pressure signatures were compared to available off-surface vortex cross-flow structures obtained using a laser vapor screen (LVS) flow visualization technique. The fillet effects on the PSP pressure distributions and the observed leading-edge vortex flow characteristics were consistent with the trends in the measured lift, drag, and pitching moment coefficients. Erickson, Gary E. and Gonzalez, Hugo A. Langley Research Center WBS 23-721-10-66...
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Semiannual Report written by and published by . This book was released on 1995 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Discrete-Vortex Method for Studying the Wing Rock of Delta Wings by : Thomas G. Gainer
Download or read book A Discrete-Vortex Method for Studying the Wing Rock of Delta Wings written by Thomas G. Gainer and published by . This book was released on 2002 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
