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The Experimental Investigation of HLFC-System Use on the Swept Wing at Subsonic Velocities
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Abstract
Carried out in the TsAGI T-107 subsonic wind tunnel (test section diameter dw.t. = 2.7 m.) has been the experimental investigation of subsonic flow -9.4·106) about a large-scale half-model (span 1.67 m, chord 0.73 m) of a swept untapered wing (χ = 35°, η = 1, c̄ = 9.8%) equipped with a local boundary-layer suction system . Based on a measured pressure distributions, angles of attack were selected (α = -2° and -4°) to be rational from the standpoint of cross-flow disturbance's development. The extent of the laminar flow zone was determined through various methods. Based on the losses of the total pressure measured in the wake behind the mid-section of the swept portion of the model, the decrease in the section drag was estimated due to local boundary-layer suction. Several laws and suction rates as well as the chordwise extents of the suction region were tested with the aim of obtaining a maximum decrease in the section drag of the swept wing.
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Bokser, V., Babuev, V., Kiselev, A., Mikeladze, V. et al., "The Experimental Investigation of HLFC-System Use on the Swept Wing at Subsonic Velocities," SAE Technical Paper 975500, 1997, https://doi.org/10.4271/975500.Also In
References
- Schlichting H. Grenzschicht-Theory 1965
- Gregory N. “Research on suction surface for laminar flow” Boundary layer and flow control Lachmann G.V. London Pergamon Press 1961 2 924 950
- Mikhailov V.V. “Laminar-turbulent transition and boundary-layer control” TsAGI - main stages of scientific activities 1968-1993 1996 367 371
- Maddalon D.V. Collier F.S. Montoya L.C. Putnam R.J. “Transition flight experiments on a swept wing with suction” IUTAM Symp. Toulouse, France 1989 Berlin Heidelberg: Springer 1990 53 62
- Bushnel D.M. “Viscous drag reduction in aeronautics” ICAS-94 Guggenheim Lecture, ICAS Proc. 1994 XXXII LVI
- Tardif C. “Laminarite: place aux essais grande echele” Air and Cosmos/Aviation International 1994 1499 44 45
- Hansen H. “The effect of suction on transition” Lessons learned from the ELFINI S1 Wind-tunnel test, 2nd European Forum on Laminar Flow Technology Bordeaux 1996
- Bokser V.D. “Aerodynamics of airfoils” TsAGI - main stages of scientific activities 1968-1993 1996 25 29
- “Viscous drag reduction in boundary layers” Bushnel D.M. Hefner J.M. Progress in astronautics and aeronautics 123 1990
- Biryukov V.I. Bokser V.D. Mikeladze V.G. Shapovalov G.K. “On some methods for experimental investigations of laminar-turbulent transition at transonic speeds” Izv. of RAN MZhG 1997 6
- Brown W.B. “A stability criterion for three-dimensional laminar boundary layer” Boundary layer and flow control Lachmann G.V. London Pergamon Press 1961 2
- Barinov V.A. Lutovinov V.M. “On the parameters of the approximate correlation of critical Reynolds number in three-dimensional boundary layer” Uchyonye Zapiski TsAGI 1972 4 4
- Ellis J.E. Poll D.I.A. “Laminar and laminarizing boundary layers by suction through perforated plates” 2nd European Forum on Laminar Flow Technology Bordeaux 1996