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Aeronautical Research Council Current Papers: Recent submissions

Now showing items 381-400 of 1393

The development of a dummy bird for use in bird strike research

A. W. R. Allcock; D. M. Collin (1968)

The problems of using bird carcases in bird strike testing are mentioned and the development of a dummy bird is described. Dummies of wax, wood, flexalkyd foam, emulsion and gelatine were tested, first by impacts on very ...
The correlation and prediction of pressure distributions on compression surfaces of sharp-edged conical bodies at high supersonic speeds

M. J. Larcombe (1968)

A method for calculating the pressure distributions around conical bodies at high supersonic speeds, based on a local cone-flow theory, has been developed from the successful correlation of pressures at a symmetrical ridge ...
A semi-empirical theory for the growth and bursting of laminar separation bubbles

H. P. Horton (1967)

A simple pressure gradient criterion for the determination of the conditions under which re-attachment of a turbulent clear layer can occur is proposed. Application of this criterion to the laminar separation bubble problem, ...
Heat transfer in a tube revolving about a displaced axis

J.F. Humphreys (1968)

Consideration is given to heat transfer and fluid flow in the entry region of a tube revolving about a displaced axis parallel to the tube axis. Experimental results indicate that both inherent swirling flow and centrifugal ...
Wind tunnel tests on six wing-body models at M = 4

J. Pike (1967)

Force measurements and flow patterns for six models, with the same ogive-cylinder body and various wings, are presented for a free streem Mach number of 4. Five of the wings were unswept, and the sixth was a 65° delta. ...
Crossflow in turbulent boundary layers

N. A. Cumpsty (1968)

Two well known representations for the crossflow velocity profile, due to Mager and Johnston, are discussed, and limitations to their applicability are outlined. A number of ideas relating to the Johnston triangular model ...
Supersonic laminar boundary layers on cones

J. C. Cooke (1966)

The boundary layer flow over a cone inclined at a small angle to a supersonic stream, and over a type of caret (Maikapar, Nonweiler) surface, as generalised by Townend, is calculated by an implicit finite difference method. ...
Approximate solutions of the three-dimensional laminar boundary layer momentum integral equations

P.D. Smith; A.D. Young (1967)

Six methods for the approximate solution of the three-dimensional laminar boundary layer momentum integral equations are presented and oompared with three known exact solutions. These methods all involve the Pohlhausen ...
A critical examination of the use of a two-dimensional turbulent profile family to represent three-dimensional boundary layers

N.A. Cumpsty (1968)

The streamwise velocity profile is established as the most suitable basic profile for the calculation of three-dimensional turbulent boundary layers. Measured streamwise profiles are compared with Thompson's two-dimensional ...
Discrete element analysis of the lateral vibration of rectangular plates in the presence of membrane stresses

D. J. Dawe (1968)

The discrete element displacement method is applied to the prediction of the natural frequencies of lateral vibration of rectangular plates which may be subjected to arbitrary systems of in-plane loading. Numerical results ...
Flight measurements of wing-tip vortex motion near the ground

F.W. Dee; O.P. Nicholas (1968)

Tests have been made to measure the movement of the wing tip vortices from a Hunter aircraft flying at 170 knots approximately 35 feet above a runway, in a variety of wind conditions. Measurements were limited to a maximum ...
The stability of boundary conditions in the numerical solution of the time-dependent Navier-Stokes equations

P. J. Taylor (1968)

This paper investigates the stability of finite-difference schemes, including boundary conditions, for solving the time-dependent Navier-Stokes equations. The different types of boundary condition whioh may occur are listed ...
A technique for studying high-velocity drawing in polymers

G. W. H. Stevens; F. C. Bluett (1966)

The principle of elastic relaxation is considered as a technique for drawing polymers at high velocities. The theory is worked out and some tests are described in which skeins of low density polyethelene filaments have ...
A survey of fluid flow and heat transfer in rotating ducts

Henry Barrow (1968)

This Paper is intended as an introduction to the study of fluid flow and heat transfer in rotating ducts, and to serve as a basis for discussion of this field of work. The interest in this subject results mainly from the ...
An experimental investigation of laminar heat transfer in a uniformly heated tube rotating about a parallel axis

W. D. Morris (1968)

The results of an experimental investigation which studies the influence of rotationally induced buoyancy on heat transfer in a tube which rotates about an axis parallel to itself is presented. Data obtained with water and ...
Modification of a normal shock by electrostatic forces

G. F. Butler (1969)

The suggestion that the sonic bang may be alleviated by electrostatic means is examined and several objections to the idea are put forward. At the same time, some theoretical aspects of supersonic electrogasdynamics are ...
Inflated mobile lifting structures practical design and trials of a circular planform model using membrane construction

A. Y. Simpson (1968)

Early lifting structures and planforms With two straight sides and circular ends and with many lifting points in order to encompass road vehicles economically. Problems of load slinging and structural inflexibility, however, ...
Performance estimates for a reflected-shock tunnel with a modified driver to produce high test-section Reynolds numbers

J. G. Woodley (1968)

Some calculations based on the performance of an ideal shock-tube are presented. These demonstrate the possibility of achieving a high test-section Reynolds number in a reflected-shock tunnel, employing nitrogen or air as ...
The influence of elevator movement on the normal accelerations experienced by a transport aircraft in moderate turbulence

D. J. Eckford (1969)

Some excerpts from a record of data obtained in an encounter with moderate turbulence during routine operations by a transport aircraft are analysed in order to assess the contribution to the cg normal accelerations from ...
Tests at M = 1.82 on an engine installation with boundary-layer diverter for a slender gothic wing

R. T. Griffiths; E. L. Goldsmith (1967)

This Paper should be read in conjunction with A.R.C.26912 (C.P. 866) The absolute values of the results obtained do not have a great significance. Their main interest lies in their relationship to those of C.P. 866. In ...

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