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Jones, Stephen J. (author)
report 1997
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Jones, J.S. (author)
report 1996
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Jones, G.S. (author), Lamb, W.S. (author)
report 1993
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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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Jones, R.G. (author)
report 1990
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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, 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, D.J. (author), Lee, B.H.K. (author)
As part of the study of the nonlinear response of structural components we investigate in this report a single degree-of-freedom nonlinear response equation usually known as Duffing's equation. Previously the response curves have been investigated analytically by many authors but there seems to have been very little numerical work done in the...
report 1985
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Jones, D.J. (author), South, J.C. (author)
The method of lines is used in this report for solving one linear, two nonlinear elliptic boundary value problems and a linear eigenvalue problem. An analysis of the stability and convergence is made in the linear cases.
report 1979
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Jones, J.G. (author)
The influence of a discrete atmospheric gust on the response of an aircraft is dependent on two primary parameters, the maximum change in gust velocity w and the gradient distance H. As the response of an aircraft is a function of the gradient distance, different aircraft having maximum response at differing gradient distances, an important...
report 1979
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Jones, N. (author)
report 1979
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Jones, D.J. (author), South, J.C. (author)
A numerical method is developed for calculating axisymmetric transonic (M > 1) flow about a blunt body. The bow shock wave location is of particular interest. A Rankine Hugoniot jump is applied at the shock while relaxation on the isentropic equation of motion is used between shock and body. The shock wave is adjusted by a Newton type iteration...
report 1975
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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, Harry D. (author)
report 1972
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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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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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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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Jones, E.B. (author), Webster, B.N. (author), Birmingham, R.W. (author), Roskilly, A.P. (author)
report
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Jones, A.F. (author), Grey-Wilson, P.V. (author), Slooff, J.W. (author)
Data are presented from calculations for the surface pressure distribution on some particular swept wings vrith Uarren 12 planform. The calculations were made using the method described in Royal Aeronautical Society Transonic Data Memorandum 6312. Comparisons are given between results obtained from an RAE computer program and a similar program...
report 1969
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