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Jones, Stephen J. (author)
report 1997
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Khalid, M. (author), Jones, D.J. (author)
This report contains an analysis of the experimental results obtained from four supercritical natural laminar flow (NLF) airfoils investigated in the NAE High Reynolds Number Test Facility. The airfoils have maximum thickness to chord ratios of 0.10, 0.13, 0.16 and 0.21 and were designed for a lift coefficient of CL = 0.6. Their design Mach...
report 1990
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Pinsker, W.J.G. (author), Jones, J.G. (author)
It is normally assumed that the direction in which a body of turbulent air is traversed in flight is not significant in relation to the aircraft, and that this is also true in non-rectilinear flight. In this paper it is demonstrated that, contrary to the results obtained using this general assumption, aircraft can experience losses or gains in...
report 1970
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Jones, D.A. (author), Reason, B.R. (author)
The College of Aeronautics was founded in 1946 and was granted university status in 1969 becoming the Cranfield Institute of Technology. In 1993 it changed its name to Cranfield University.
report 1964
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Hinchliff, S. (author), Jones, J.W. (author)
The College of Aeronautics was founded in 1946 and was granted university status in 1969 becoming the Cranfield Institute of Technology. In 1993 it changed its name to Cranfield University.
report 1955
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Khalid, . (author), Jones, D.J. (author)
Further wind tunnel tests have been carried out on the NAE 10" chord supercritical NLF airfoil NAE 68-060-21:1. This airfoil in previous tests showed very low drag levels when free transition was allowed on the model. In the main part of the current investigation, performed at chord Reynolds number of about 7,9 and 13 million, transition was...
report 1986
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Jones, J.G. (author), Tomlinson, B.N. (author)
Several aspects of the simulation of flight in turbulence are reviewed, including mathematical models of aircraft response to turbulence, models and measured properties of atmospheric turbulence, and the subjective reactions of the human pilot. Pilots appear to be particularly sensitive to the large, intermittent, peaks that occur in the...
report 1971
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Daniels, R. (author), Jones, J.G. (author)
A discrete step model of low-altitude atmospheric turbulence is described. It has been derived from a commonly used continuous Gaussian process model by considering transitions occurring over discrete intervals. The consequent elimination of fine structure enables additional statistical properties to be calculated. A primary objective is to...
report 1970
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Jones, R.T. (author)
report
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Shen, P.S. (author), Jones, D.J. (author)
The incompressible, three-dimensional, laminar boundary layer flow on a flat plate about a half-cone protuberance has been investigated bath by experiment in the NAE water tunnel and by analysis using Cooke's small cross-flow momentum integral method. Three half cones of semi-apex angles 7½, 10° and 12½, were tested at a Reynolds number of 2 x...
report 1967
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Shen, P.S. (author), Jones, D.J. (author)
report 1967
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Jones, D.J. (author), Khalid, M. (author)
NAE and de Havilland Aircraft of Canada have designed and tested in the NAE 5 ft X 5 ft wind tunnel a 21% thick supercritical airfoil capable of sustaining long runs of laminar flow on both surfaces. The measured drag levels are superior to those of any model previously tested in this facility and are comparabIe to classical NACA and modern NASA...
report 1985
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Jones, N. (author)
report 1979
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Zbrozek, J.K. (author), Jones, J.G. (author)
The buffet loads occurring during a transient incursion into the buffet regime due either to a gust or a manoeuvre are briefly discussed. Review of the experimental evidence suggests that although there are substantial effects of the rate of change of incidence on the value of CLmax there is no real evidence that buffet boundaries behave in the...
report 1965
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Jones, Harry D. (author)
report 1972
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Jones, D.J. (author)
report 1968
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Krishnappa, G. (author), Jones, L.R. (author)
An expression is derived to calculate the directivity of the far field sound pressure levels radiated from an annular duct based on Tyler and Sofrin's approach for a circular duet. Both radial and circumferential variations in the acoustic pressure field inside the duct are considered in the derivation. A computer programme to calculate the...
report 1973
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Jones, E.B. (author), Webster, B.N. (author), Birmingham, R.W. (author), Roskilly, A.P. (author)
report
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Jones, J.G. (author)
This Report extends earlier work employing the concept of a self-similar random process in relation to the problem of predicting aircraft gust loads. A discrete gust model of the atmosphere is presented which allows a description of the statistical properties of intense gusts as a function of gust length. Empirical functions describing the...
report 1969
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Cooke, J.C. (author), Jones, O.K. (author)
Certain three-dimensional surfaces studied by Townend have the property that at every streamwise section a supersonic air stream is compressed isentropically in the form of a reversed Prandtl-Meyer flow. If all the compressions are centred on points lying on one straight line the flow is conical. Such a surface may be of use as an engine intake....
report 1964
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