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Experimental Investigation Of Vortex Tail Interaction On A 76 40 Degree Double Delta Wing
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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 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 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 An Experimental Investigation of the Flow Fields about Delta and Double-delta Wings at Low Speeds by : William H. Wentz (Jr.)
Download or read book An Experimental Investigation of the Flow Fields about Delta and Double-delta Wings at Low Speeds written by William H. Wentz (Jr.) and published by . This book was released on 1966 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of Vortex Flow Control Using Juncture Fillets on a Cropped Double-delta Wing by : Sheshagiri K. Hebbar
Download or read book Experimental Investigation of Vortex Flow Control Using Juncture Fillets on a Cropped Double-delta Wing written by Sheshagiri K. Hebbar and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
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 An Experimental Investigation of Leading Edge Vortices and Passage to Stall of Nonslender Delta Wings by :
Download or read book An Experimental Investigation of Leading Edge Vortices and Passage to Stall of Nonslender Delta Wings written by and published by . This book was released on 2003 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of Incompressible Flow Over Delta and Double-Delta Wings by : James K. Nathman
Download or read book An Experimental Investigation of Incompressible Flow Over Delta and Double-Delta Wings written by James K. Nathman and published by . This book was released on 1976 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study of the flow over delta and double-delta wings was conducted in a 7' x 10' low speed wing tunnel. The configurations tested were AR-3 and AR-4 delta wings and the AR-4 wing which was modified with AR-1 and AR-2 strakes attached to form double-delta wings. Pressure measurements, surface flow visualization, and vortex core visualization studies were conducted over a wide range of angles of attack.
Book Synopsis Experimental Investigation of the Vortex-vertical Tail Interaction on an F-15 by : S. P. LeMay
Download or read book Experimental Investigation of the Vortex-vertical Tail Interaction on an F-15 written by S. P. LeMay and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of the Effects of Oscillating Vortex Flaps on the Low Speed Aerodynamics of a 70 Degree Delta Wing by : Christopher J. Hardin
Download or read book An Experimental Investigation of the Effects of Oscillating Vortex Flaps on the Low Speed Aerodynamics of a 70 Degree Delta Wing written by Christopher J. Hardin and published by . This book was released on 1991 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of Delta Wing Vortex Flow with and Without External Jet Blowing by : Kenneth P. Iwanski
Download or read book An Experimental Investigation of Delta Wing Vortex Flow with and Without External Jet Blowing written by Kenneth P. Iwanski and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of Vortex Breakdown on Slender Delta-wing Planforms by : Alain Pelletier
Download or read book An Experimental Investigation of Vortex Breakdown on Slender Delta-wing Planforms written by Alain Pelletier and published by . This book was released on 1994 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Jolie Collection de tableaux des 3 ecoles, bronzes curiosités Dessins by :
Download or read book Jolie Collection de tableaux des 3 ecoles, bronzes curiosités Dessins written by and published by . This book was released on 1833 with total page 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 Interacting Wing-tip Vortex Pairs by : Jeffrey S. Zsoldos
Download or read book An Experimental Investigation of Interacting Wing-tip Vortex Pairs written by Jeffrey S. Zsoldos and published by . This book was released on 1992 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of the Passive Control of Reverse Delta Wing Vortex Flow Structure and Aerodynamics Characteristics by : Hongzhi Mou
Download or read book An Experimental Investigation of the Passive Control of Reverse Delta Wing Vortex Flow Structure and Aerodynamics Characteristics written by Hongzhi Mou and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis summarises an experimental study of a 65-sweep reverse delta wing (RDW) by using a seven-hole pressure probe and a two-component force balance at Re = 270,000. Dye water flow visualization was also conducted in order to better understand the flow structure. Particular emphasis was placed on the variation of vortex flow quantities and critical flow parameters such as the core circulation, total circulation, tangential velocity and axial core velocity with change in chordwise locations from x/c = 0.2 to x/c = 1.5 for [alpha] = 10°- 22°. Based on lift measurements, the RDW generated less lift from [alpha] = 8° to [alpha] = 35° in comparison with the conventional delta wing (DW). Hence, lift augmentation was attempted by attaching passive control devices such as a side edge strip (SES) and a leading edge strip (LES), made from aluminum strips with different widths, which were placed perpendicularly to the wing's bottom surface. The flow field scans showed that the vortex flow underwent diffusion while it progressed in the chordwise direction. The size of the separated flow region, which originated from the spanwise vortex breakdown, increased with the angle of attack. Compared to a baseline RDW, RDW with SES generated a pair of more concentrated vortices with a higher core and total circulation values. Compared to a baseline RDW, the lift coefficient generated by the RDW with a 1.5% c SES and a 3% c SES increased by 0.18 to 0.28 on average, for angles of attack ranging from 0° to 40°. In addition, 1.5% c and 3% c SES boosted the wing's lift-to-drag ratio, for an average of 24% and 5%, respectively, from angles of attack of 10° to 20°. The dye flow visualization showed that the vortex flow generated by the RDW was located outside of the wing's surface and the vortex generated by the DW is located above the wing surface, in which suggesting the vortex lift is not applicable to a RDW. " --
