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Labrujere, T.E. (author)
A description is given of a method for the determination of global corrections for wall interference in both solid- and ventilated wall windtunnels, 2D as well as 3D. The method is based on the assumption that the flow velocity is known at a control surface surrounding the model and that the main part of the flow field may be considered...
report 1984
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van Egmond, J.A. (author), van den Berg, B. (author), Labrujere, T.E. (author)
At NLR a system for the computational design on multi-element airfoil has been developed. This design system solves the inverse aerodynamic problem in an approximate way. A priori specified aerodynamic requirements (surface pressure distribution) and geometric requirements are minimized in a least-squares way, introducing weight factors to...
report 1983
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Labrujere, T.E. (author)
A number of alternative approaches for solving the analysis problem is discussed. These approaches have in common a second order representation of both airfoil contour and doublet distribution but are based on different integral equations. The method based on a second kind integral equation and spline representations appears to be most promising...
report 1979
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Labrujere, T.E. (author), Roos, R. (author), Erkelens, L.J.J. (author)
A survey is given of the basic principles of the panel methods. The most frequently used methods, steady as well as unsteady, are described in some detail. Recent developments aiming at improvönent and extension of the range of applicability are reviewed. The use of panel methods for the determination of stability derivatives is discussed....
report 1977
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Labrujere, T.E. (author)
The present report describes a method for the design of airfoils in incompressible flow which, subject to geometrical constraints generate approximately a given distribution of the pressure coefficient along the projection of the airfoil chord on an axis parallel to the onset flow. The flow is simulated by means of a distribution of...
report 1976
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van de Vooren, J. (author), Labrujere, T.E. (author)
report 1973
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Labrujere, T.E. (author), Schipholt, C.J. (author), de Vries, O. (author)
report 1972
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Labrujere, T.E. (author), Schipholt, G.J. (author), de Vries, O. (author)
report 1972
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Labrujere, T.E. (author), Maarsingh, R.A. (author), van der Vooren, J. (author)
report 1972
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Bennekers, B. (author), Labrujere, T.E. (author)
A method is desoribed for calculating the aerodynamic loading on nonplanar, infinitely thin, harmonically oscillating airfoils in subsonic flow as originally developed by Albano, Redden, Qiesing and Kalman. The generalized aerodynamic force coefficients are determined from the calculated pressure distributions. Because of the flexibility of the...
report 1972
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Labrujere, T.E. (author), Sytsma, H.A. (author)
The availability of large capacity computers has widely increased the possibility of predicting aerodynasiic interference between aircraft components. An example of the numerical methods developed recently for that purpose is the NLH-panelmethod. In the present paper the capability of this method is illustrated by means of application to complex...
report 1972
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Labrujere, T.E. (author)
report 1972
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Labrujere, T.E. (author), Schipholt, G.J. (author), de Vries, O. (author)
The applicability of potential flow calculations for developing high-lift devices, is evaluated by comparing calculated pressure distributions over wing sections with trailing and leading edge high-lift devices, and experimental results, obtained during routine wind tunnel tests.
report 1972
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Labrujere, T.E. (author), Bleekrode, A.L. (author)
Lecture presented at the Von Karman Institute in Brussels during the short course on Numerical methods in Fluid Dynamics, 7 - 11 February 1972.
report 1972
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Labrujere, E. (author), Zandbergen, P.J. (author)
Results are presented which are obtained by a new elaborate method developed at NLR for the determination of the characteristics of thin wings in subsonic flow. Attention is paid to the rate of convergence of the numerical solutions, especially with respect to the number of collocation points. Two rectangular wings have been treated in order to...
report 1971
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Labrujere, T.E. (author), Loeve, W. (author), Slooff, J.W. (author)
Paper presented at the AGARD Specialist Meeting "Aerodynamic Interference", Silver Spring, Maryland , 28 - 30 September 1970
report 1970
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Labrujere, T.E. (author), Wouters, J.G. (author)
The present report deals with the description of an Algol programme based on a new elaborate method developed at NLR for the determination of lift distributions on thin wings in subsonic flow. The method is briefly discussed. The computer programme is described in more detail.
report 1970
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van Boxtel, M.M.P. (author), Labrujere, T.E. (author)
report 1969
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Labrujere, T.E. (author), Loeve, W. (author), Slooff, J.W. (author)
Tho design of aircraft for efficient flight at high subsonic speeds demands for methods by which the pressure distributions on wings can be predicted accurately. The present paper is concerned with an approximating method that is based on the fact that the main characteristics of subsonic flow about wings are described rather well by the...
report 1968
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Garner, H.C. (author), Hewitt, B.L. (author), Labrujere, T.E. (author)
Independent numerical methods for obtaining the subsonic load distribution on a thin wing of arbitrary twist and camber have been developed at NPL, NLR (Netherlands) and BAC (Warton), The three methods have been studied jointly and their novel features have been reviewed critically. The best solutions by each method show excellent agreement for...
report 1968
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