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- Smith, D.S. (author) report 1989
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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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Smith, J. (author)The displacement effect of a body in an air stream increases when regions of non-linear flow, such as locally supersonic flow, occur. Therefore, a subsonic formulation of the displacement effect must fail for transonic flow conditions. It is shown that, for the particular case of a two-dimensional aerofoil, a subsonic formulation may...report 1986
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- Smith, J. (author) report 1986
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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, C.J.E. (author), Hewins, M.A.H. (author)Rotating bending fatigue tests have established that glass bead and alumina grit blasting have only a slight effect on the fatigue properties of 2014-T6 aluminium alloy. Exposure to salt fog for 8 hours or alternate immersion in 3½% salt solution for 3 days reduces the fatigue strength from 170 MPa to 107 MPa and 64 MPa respectively but...report 1984
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Maarsingh, R.A. (author), Labrujère, T.E. (author), Smith, J. (author)The present paper describes two alternative correction methods for wall interference based on measured boundary conditions. In both methods it is assipied that at or near the tunnel boundary the flow velocity will be measured in magnitude and direction and that the main part of the flow field may be considered irrotational and subsonic. One...report 1984
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- Lindhout, J.P.F. (author), Cousteix, J. (author), Humphreys, D. (author), Smith, P.D. (author), Kordulla, W. (author) report 1984
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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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Woodrooffe, J.H.F. (author), Morisset, L.E. (author), Smith, C.A.M. (author)A simplified mathematical solution to predict transient off tracking of multiple vehicle combinations is presented. The generalized equations assume a constant radius curve of any angular duration with a tangent lead in and run out. The validated solution yields the off tracking of a vehicle or vehicle combination with respect to a track mounted...report 1983
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Smith, J. (author)Modern developments in wind tunnel wall correction methods are for a major part directed towards the use of in situ measured boundary conditions in order to eliminate the need to describe the complicated aerodynamic characteristics of test section walls. This paper presents a short general review of the principles of such methods for 2D flow....report 1982
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Smith, J. (author)A "measured-boundary-condition" method for determining 2D wall interference has been developed. It applies measured "wall" pressure distributions and a model representation to determine the 2D interference flow field associated with the presence of the test section walls. Special attention has been paid to the model representation. The...report 1981
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- van den Berg, B. (author), Cousteix, J. (author), Fanneløp, T.K. (author), Hirschel, E.H. (author), Smith, P.D. (author) report 1978
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Hindson, W.S. (author), Smith, R.E. (author)The influence of wind, wind shears and turbulence on the approach and landing tasks of STOL and V jSTOL aircraft has become of significant concern for this evolving class of flight vehicles, particularly during instrument flight operations. Flight experiments have been carried out to assess the considerations in alleviating the effects of a long...report 1976
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Smith, J. (author)The report describes experiences with the Garabedian and Korn program for the computation of compressible potential flows, with or without shocks, both supercritical shockless flows and flows with shock waves. Computations for a number of quasi-elliptical aerofoils indicated that the conformal mapping procedure should be handled with care....report 1974
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O'Neill, P.H. (author), Smith, R.J. (author)This Report describes the results of laboratory fatigue tests on riveted joints, half of which had been impregnated with a water-displacing, oil-based penetrant which is commonly being used in airline service to combat corrosion. The results showed that the lives of the treated specimens were significantly shorter than those of the untreated...report 1973
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Smith, E. (author)Dimensional changes and the development of cracking in the Charpy V-notch impact test have been studied using a low energy blow technique. Notch opening, angle of bend, notch root contraction and lateral expansion are shown to be proportional to the energy of the low blow which does not cause complete fracture and to be relatively independent of...report 1973
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Smith, P.D. (author)A calculation method has been developed which uses the compressible forms of the boundary-Iayer momentum integral and entrainment equations in a genera I, curvilinear surface coordinate system in which the axes are not necessarily orthogonal. Both the Mager and Johnston representations of the crossflow velocity profile can be used. The set of...report 1972
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Enthoven, M.E.E. (author), Smith, J. (author)Recently a new method has been developed to determine the interference characteristics of ventilated walls in transonic wind tunnels, based on the comparison of experimentally determined and theoretically calculated interference drag forces on two-dimensional models. Pressure measurements and wake surveys on seven two-dimensional models, with...report 1972
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Campbell, D.J. (author), Apps, R.L. (author), Smith, E. (author)Submerged arc welds were prepared in quenched and tempered steel plates using a mild steel wire, two low alloy steel wires, and commercially available fluxes. Heat inputs of 1.2, 2.2, and 4.3 KJ/mm were used for each wire/flux combination and in each case the preheat/ interpass temperature was maintained within the range 120 - 150º C. Sections...report 1972