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- Staarink, H.A.M. (author) doctoral thesis 1995
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Moes, C.C.M. (author)The pressure distribution and the location of the points of maximum pressure, usually below the ischial tuberosities, was measured for subjects sitting on a flat, hard and horizontal support, and varying angle of the rotation of the pelvis. The pressure data were analyzed for force- and pressure-related quantities. Multiple regression was...journal article 2007
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- Zijlema, M. (author), Segal, A. (author), Wesseling, P. (author) journal article 1995
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Jansen, A.J. (author), Van Abbema, A. (author), Howe, C. (author)The paper presents the changes in perceived comfort while hiking in a sailing boat (in this case the Laser, a single-handed Olympic dinghy) due to a new design of hiking pads. The project used a ‘research by design method’. The aim was to improve sailing comfort which leads to lower fatigue and therefor improved performance. While hiking, a...journal article 2012
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Smulders, M. (author), Berghman, K. (author), Koenraads, M. (author), Kane, J.A. (author), Krishna, K. (author), Carter, T.K. (author), Schultheis, U. (author)BACKGROUND: The concept of comfort is one way for the growing airline market to differentiate and build customer loyalty. This work follows the idea that increasing the contact area between human and seat can have a positive effect on comfort [5, 6, 7]. OBJECTIVE: To improve comfort, reduce weight and optimise space used, a human contour...journal article 2016
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Dassanayake, Darshana T. (author), Antonini, A. (author), Pappas, Athanasios (author), Raby, Alison (author), Brownjohn, James Mark William (author), D’Ayala, Dina (author)The survivability analysis of offshore rock lighthouses requires several assumptions of the pressure distribution due to the breaking wave loading (Raby et al. (2019), Antonini et al. (2019). Due to the peculiar bathymetries and topographies of rock pinnacles, there is no dedicated formula to properly quantify the loads induced by the breaking...journal article 2021
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Dangal, S. (author), Smulders, M. (author), Vink, P. (author)This paper investigates whether spring-foam technology in an aircraft seat-pan can reduce weight and at the same time provide equal or better comfort. Firstly, through literature studies and using an iterative design process a prototype seat-pan was designed and developed using spring-foam technology. The (dis)comfort of this seat was...journal article 2021
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Gedikli, Ersegun Deniz (author), Nord, Torodd Skjerve (author), Hendrikse, H. (author), Ziemer, Gesa (author)Pressures at the ice-structure interface during model-scale ice-structure interaction are often measured with tactile sensors. Resulting datasets usually include large volume of data along with some measurement error and noise; therefore, it is inherently hard to extract the hidden fluctuating pressures in the system. Identifying the...journal article 2019
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Labruijere, T.E. (author)A program system has been developed as a tool for interactive analysis and design of multi-element airfoils in incompressible viscous flow. A global description of the system is given. It involves the application of three computational methods, one for the analysis of viscous flow and one for the analysis of inviscid flow around multi-element...report 1983
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Tijdeman, H. (author)Based on experimental observations an illustration is given of typical effects occiirring in high subsonic and transonic flow around oscillating airfoils and wings. It is shown that in this speed regime the unsteady airloads are influenced considerably by the interaction of the steady and unsteady flow fields. Moreover the periodical motion of...report 1975
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Pot, P.J. (author)Extensive measurements of mean and fluctuating quantities in a 2-D wake shed from a flat plate and in the flow field of a 2-D wake merging into a boundary layer are described. The 'results are given in tabular and graphical form.report 1979
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van der Vooren, J. (author), van der Kolk, J.T. (author), Slooff, J.W. (author)A description will be presented of a computer program system that is being used for the prediction of aircraft steady aerodynamic characteristics. Properties of the system are described from two different viewpoints. One is that of the aerodynamic designer, who needs an information system to predict lift, moment and drag characteristics and to...report 1982
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Zandbergen, T. (author), Maarsingh, R.A. (author), Joosen, C.J.J. (author)With the intent to test the qualities of the theoretical models used in two different calculation methods, pressure distributions have been measured on a simple half model wing-in-jet combination. The position of the jets relative to the wing was varied, mainly in a plane perpendicular to the span. Jet velocities of 1, 2 and 3 times the tunnel...report 1977
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Kooi, J.W. (author)An experiment is described in which a nominal normal shock impinges on a turbulent flat plate boundary layer. The wall pressure distribution in the interaction region was measured for Mach numbers in front of the shock of 1.40, 1.44 and 1.46. The Reynolds number based on shock position was 18 X 10(6) and based on momentum thickness at the start...report 1978
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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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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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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
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Kuiper, H. (author), van der Wees, A.J. (author), Hendriks, C.F.W. (author), Labrujère, T.E. (author)NLR participates in the ECARF (European Computation Aerodynamics Research Project) "Optimum Design" project, developing an algorithm for multi-point airfoil design. Within the ECARP project a test case has been defined for two-point design with the aid of well-specified target pressure distributions. It appears that optimization of pressure...report 1995
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Hounjet, M.H.L. (author)A new method ARSPSC is described for the calculation of steady and time-linearized unsteady subsonic potential flow about complex 2-D and 3-D configurations. The method belongs to the category of the so-called panel methods. Applications have been made to a 2-D oscillating flat plate, a 2-D multi-component airfoil with oscillating flap and a 3-D...report 1986
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van der Vooren, J. (author), Huizing, G.H. (author), van Essen, A. (author)A calculation method, based upon transonic small perturbation theory, is presented for the transonic flow about a semi-wing. The influence of a body can be simulated by prescribing appropriate transverse velocities in a vertical plane through the wing root. Due to the small perturbation assumption the wing should be thin and have little dihedral...report 1981
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