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Wild, J. (author), Brezillon, J. (author), Mertins, R. (author), Quagliarella, D. (author), Germain, E. (author), Amoignon, O. (author), Moens, F. (author)The design activity within the EUROLIFT II project is targeted towards an improvement of the take-off performance of a generic transport aircraft configuration by a re-design of the trailing edge flap. The involved partners applied different optimization strategies as well as different types of flow solvers in order to cover a wide range of...conference paper 2006
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- Yoo, Jaehoon (author), Kim, Hyoung Tae (author) journal article 2006
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Tsai, Y.S. (author), Grass, A.J. (author), Simons, R.R. (author)The initial growth of mechanically generated small amplitude water waves below a laminar air stream was examined numerically and experimentally in order to explore the primary growth mechanism, that is, the interfacial instability of coupled laminar air and water flows. Measurements of the laminar velocity profile in the air over the water...journal article 2005
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De Wit, M.S. (author)This paper reports on an analysis of the uncertainty in wind pressure (difference) coefficients, which are assessed on the basis of generic knowledge and experimental data rather than with a specific (wind tunnel) experiment. The analysis is carried out on time averaged pressure coefficients in a specific case, concerning a low-rise building in...journal article 1999
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Mayer, R. (author)Wall-shear stresses are highly important in the aerodynamic design of aircraft, because they determine the drag and thus the fuel consumption of an airplane. Due to this importance many different measurement techniques have been developed. Most of these techniques are intrusive, which means that the flow is disturbed by the presence of a...book 1998
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- Donohoe, S.R. (author) doctoral thesis 1996
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Bos, J.F.T. (author), Faasse, P.R. (author)The High Speed wind Tunnel (HST) of the National Aerospace Laboratory NLR is one of the major transonic windtunnels and is used for aerodynamic research on scale models. The measurements require the control of the Mach number. Two kinds of controller tasks can be distinguished: keeping the Mach number constant, and realizing a different Mach...report 1992
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Ohman, L.H. (author), Brown, D. (author), Chan, Y.Y. (author), Galway, R.D. (author), Hashim, S.M. (author), Khalid, M. (author), Malek, A. (author), Mokry, M. (author), Tang, N. (author), Thain, J. (author)The NAE 5ftx5ft blowdown wind tunnel has undergone a major upgrade of its transonic testing capabilities. Two entirely new test sections, one for testing two-dimensional models (2D) and one for testing three-dimensional models and reflection plane models (3D), have been constructed. The two test sections are parts of the so-called Roll-in Roll...report 1990
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den Boer, R.G. (author)A new postprocessing procedure is applied on the data, acquired in 1981 during the unsteady transonic pressure measurements on a transport-type supercritical wing (LANN-model), oscillating in pitch. The new procedure takes the influence into account of the local boundary layer on the dynamic response of the pressure tubes. This report presents...report 1989
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Labrujère, T.E. (author)A method is described, which is the result of further work on a measured boundary condition method developed at NLR, aiming at on-line application. The method requires a minimum of measured tunnel-wall pressures and applies a fast algorithm for the calculation of the wall interference. Some numerical test results are discussed.report 1989
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Baljeu, J.F. (author)A three-component internal strain-gauge balance for use in a cryogenic wind tunnel has been developed by NLR. With this balance model tests were performed in the NASA 0.3-m Transonic Cryogenic Tunnel. The results are discussed with a view to the development of strain-gauge balances for the ETW.report 1988
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Lee, B.B.K. (author), Tang, F.C. (author)A supercritical airfoil with a trailing edge flap has been the subject of aerodynamic investigation in the National Aeronautical Establishment's High Reynolds Number 2-D Test Facility. The effects of flap deflection on buffet intensities and delay of buffet onset at transonic speeds were studied. Buffet boundaries for various flap angles were...report 1988
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Labrujère, T.E. (author), Maarsingh, R.A. (author), Smith, J. (author)Measurements on a simple aircraft model in both an appropriately sized and a relatively large, low-speed, solid-wall test section were used to analyse the accuracy and consistency of measured-boundary-condition (MBC) methods. For completeness, the classical method of images, with two different correction procedures, was also analysed. For the...report 1988
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Zandbergen, T. (author)An experimental investigation was carried out in the low speed wind tunnel LST to study aircraft engine noise generation by rotor/stator interaction. Reported is a follow-up experiment including detailed acoustic measurements in the duct downstream of a rotor with cylindrical pins to complement earlier tests whereby rotor wake velocities and...report 1987
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Elsenaar, A. (author)As part of the joint International Vortex Flow Experiment, force and pressure measurements have been carried out on a 65 deg delta wing configuration in the transonic and supersonic wind tunnels of NLR. Out of these data three test cases were selected by the organizing committee of the GAMM WORKSHOP on the "Numerical Simulation of Compressible...report 1986
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- Smith, J. (author) report 1986
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Bulakh, B.M. (author)First published in the Russian language under the title: Nelineynyye Konicheskiye Techeniya Gaza, Izdatel'stvo Nauka, Moscow, 1970.book 1985
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Smith, J. (author)The applicability of a multi-velocity-component static pipe, proposed by CALSPAN ATC, for measuring boundary velocity vector distributions in behalf of wall interference assessment, has been explored in two-dimensional flow. Comparisons with alternative methods to derive the local flow angle from measured pipe pressures as well as analyses of...report 1985
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Smith, J. (author)The applicability of two-dimensional flexible solid wall test sections for three-dimensional testing is theoretically investigated for linearized subsonic flow. The method uses known interference velocity distributions along a targer line (derived from a method of images for this particular study). From these, wall shapes are calculated that...report 1984
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Vogelaar, H.L.J. (author)A description is given of the two-dimensional test setup in the pressurized wind tunnel HST of the NLR, for the testing of multiple airfoils at high Reynolds numbers. Results of the first tests with this setup are validated. For this validation a number of additional tests were performed in the HST as well as in the atmospheric wind tunnel HST 3...report 1983