Head of Department: Professor P. L . Henderson STAFF
Full-time Officers
Professor PAUL LEWIS HENDERSON, M.E. (Syd.), Ph.D. (Cantab.), M.Mech.E, M.I.Mech.E, M.l.C.E, M.I.Chcm.E, M.I.E.Aust, Barrister-at-Law (Inner Temple, London)
Senior Lecturers:
KENNETH HENDERSON HUNT, M.A. (Oxon), M.Mech.E, A.M.I.Mech.E, A.M.l.E.Aust.
NOEL L E V I N SVENSSON, M.Mech.E. (Melb.), A.M.l.E.Aust.
Lecturers:
PETER NUMA JOUBERT, B.E. (Svd.), A.F.R.Ac.S.
SIDNEY JOHN CLIFTON, B.E. (Svd.)
RAYLEIGH ST CLAIR PITT, B.Sc.', B.E. (Syd.), A.M.l.E.Aust.
ROBERT HALLOWES BROWN, B.Mcch.E, S.M. (M.I.T.) Assistant Lecturers:
EZEY MEYER MANSOOR, B.Mcch.E.
DEANE ROBERT BLACKMAN, B.Mech.E.
J U L I A N HUNKA, D.Ing. (Lodz.), Dip.Ing. (Danzig) ROSS SPENCER SEARLS, B.Mech.E, A.M.l.E.Aust.
ERIC EDWARD M1LK1NS, B.Mcch.E.
Senior Demonstrators:
I A N DAVIES INGRAM, B.Mech.E.
EDWIN JOSEPH ARMAREGO, B.Sc. (Eng.) (Lond.)
Drawing Office Supervisor, LESLIE JAMES JONES, Dip.Mcch, and Elect. Eng.
(Q'land)
Demonstrator in Machine Tools, DOUCLAS W I L L I A M CAMPBELL
During 1958, research work in the Department has been conducted in the two main fields of Machine Tools and Applied Mechanics.
Thc various projects are listed below.
A. MACHINE TOOLS (1) Geometric Analysis of Engineering Designs
Workers: E. M. Mansoor and P. L. Henderson
This project commenced in 1957. The literature survey on this subject was completed early this year.
A study was made of typical machine capabilities and their use in quality control charts in industry.
Thc frequency distribution of various machine processes was in- vestigated with the view of extending thc theory of probability to assembly problems.
(2) Measurement of Residual Stresses in Machined Surfaces Worker: R. H. Brown
It is proposed to measure the residual stress near the surface of materials which have been cut under a variety of conditions with simple orthogonal and oblique tools. It is hoped to relate cutting
104 ;
M E C H A N I C A L E N G I N E E R I N G 105
forces and temperature rise with residual stress to give a better in- sight to the plasticity condition in the chip and work piece near both the rake and clearance faces of the cutting tool.
The stress in thc work material will be determined from measure- ments of the curvature of the work pieces as thin layers are suc- cessively removed—either by etching or electro-polishing. A strain gauge dynamometer for thc measurement of the cutting forces has been designed and is being constructed in the Engineering Work- shops.
(3) A Study of Cutting Tools at Fine Depths of Cut Workers: E. J. A. Armorego and R. H. Brown
Thc object is to investigate (a) the growth of wear land and some factors affecting it, (b) thc variation of cutting forces due to wear on tool tips. A fly milling cutter with a single tool will be used and the depths of cut taken will bc of the same order as those used in grinding. The apparatus is being designed.
B. APPLIED MECHANICS (4) Oil Pressure in Journal Bearings
Workers: G. S. Jost and S. J. Clifton
This project, which commenced in 1957, aims to measure the dis- tribution of fluid pressure within the oil films of hydrodynamically lubricated journal bearings for both steady and fluctuating loading.
During 1958 work was directed to the design, development and calibration of a new type of hydromechanical pressure gauge which is suitable for this work and both simple and cheap to construct.
Theory, predicting the dynamic performance, was set up and verified by experiment; so that gauges of this type with specified frequency response and limits of pressure operation may now be designed rationally. The bearing test apparatus itself has reached an advanced stage of design and manufacture. A thesis for the degree of M.Eng.Sc, outlining in detail the achievements so far. is being prepared by G. S. Jost.
The work will continue.
(5) The Effect of T i p Jets on the Performance of an Airscrew Workers: R. Gani and P. N . Joubcrt
This work commenced in 1957.
The family of airscrews was tested in the wind tunnel over a range of wind speeds, propellor revolutions and blade angles while the mass flow through slots in the propellor tips was varied. The greatest thrust increments were observed for tbe designed rotational speed at low forward speeds. The experimental work has been completed
106 F A C U L T Y OF E N G I N E E R I N G
and is being written up by R. Gani for presentation for the degree of M.Eng.Sc.
(6) Three Dimensional Yawed Boundary Layers Workers: D. R. Blackmail and P. N. Joubert
A theory has been presented by D . Coles of Caltech. This project aims to examine Coles' theory i n the light of experimental evidence.
A hot-wire anemometer has been built for examining the velocity profiles on a swept wing. These measurements will be correlated with pitot tube measurements and visual observations of flow direction.
The work is continuing.
(7) A Comparative Study of Catamarans Worker: P. N. Joubert
This project commenced in 1955. Thc performance of a catamaran has been compared with a destroyer for two design conditions.
The displacement ratio and other shape parameters have been maintained constant. Catamaran models with different values of beam-draught ratio have been tested and compared. The modified catamaran with reduced beam-draught ratio has shown improved performance over the destroyer.
The work is continuing
(8) Mechanism—Geometry and Kinematics Worker: K. H. Hunt
The aim of this project is to investigate and rationalize the design, geometry and synthesis of mechanical mechanisms in as many ways as possible.
Methods for designing the following were developed :
(i) a range of space linkages for generating pure sinusoidal motion (see Published Work),
(ii) a range of space linkages giving a positive dwell period with- out using complicated profiles and with surprising economy of moving parts (see Published Work),
(iii) a range of Linkage-Geneva Mechanisms (paper in preparation).
Thc work is continuing (9) Steam Accumulator
Workers: K. PI. Hunt and I. D. Ingram
The aim of this project is to build equipment for investigating the following topics:
(i) industrial steam saving,
(ii) processes of free-surface condensation and rc-evaporation in an accumulator vessel,
(iii) rational design of condensation nozzles and other fittings.
M E C H A N I C A L E N G I N E E R I N G 107
A steam accumulator was designed and has been manufactured and delivered ready for installation.
This project has just been started and will continue.
PUBLISHED WORK
1. HUNT, K. H.— Two Reforms: (i) Numbers and Accuracy, (2) Vector Analysis. Bull. Mech. Engng Educ. 14: 51-3 (1958) 2. Exact Linear Simple Harmonic Motion by a Space-
Linkage. Aust. ] . Appl. Sci. 9: 332-6 (1958)
3. Dwell-Linkages in Space. Engineering 187: 248-9 (1959)
THESES PASSED FOR HIGHER DEGREES
MASTER OF ENGINEERING SCIENCE
1. RIEGER, N . F. High Speed Air Lubricated Journal Bearings MASTER OF MECHANICAL ENGINEERING
2. DEAN, S. K. Reports on Plant Engineering Projects 3. FABIC, S. Attenuation of Noise and Vibration in Pas-
senger Motor Vehicles