Calendar: 1975-1976 Page 458

lxxxvi Annual Report of the Delegacy being made to predict the size and nature of silencer required in relation to engine design and running conditions Dr Tindal's work on the investigation of cyclical variations in the combustion process of reciprocating engines is continuing and has reached an interesting stage In the small gas-turbine field work on the design parameters of centripetal gas turbine in non-steady flow has now been completed The award of Ph has been recommended for thesis written on this project further stage has been reached in the study of air move- ments in the nozzleless volutes of small radial turbines Some further experimental work is required before this work can be brought to conclusion Under the direct supervision of our Special Lecturer Mr Kellett work has begun to investigate the feasibility of pressure- charged combustion system for steam generator using small gas turbine as the energy source Professor Kastner and Mr Kellett have prepared paper on small turbocharged diesel engines as power units for passenger cars and this has been accepted for publication Professor Rose and Dr English have continued their studies of the flow of granular materials and their investigation of the thermal conductivity of powdered substances They have also initiated projects concerned with the applications of the techniques of network analysis and queueing theory During the session three postgraduate students of Powder Technology submitted theses and were recommended for the award of the Ph The work on sieving and screening referred to in last year's report has led to new theoretical approach and this has been described by Dr English in paper published this year Dr Organ's experimental and theoretical researches into Stirling Cycle machines have made good progress and two papers are in course of preparation Dr Vinnicombe has continued development work on novel type of refrigerator compressor and Dr Fenner is preparing paper on stress singularities in composite materials Mr Gosney's studies of enthalpy gains resulting from the opening of doors in cold stores have led to the development of simulation tech- nique for continuously open and intermittently open apertures subsidiary programme has led to the investigation of discharge co- efficients at very low Reynolds numbers The determination of opti- mum parameters for certain types of refrigerator evaporators has been completed and also the determination of fin efficiencies by finite element and finite difference methods Results are now available for wide variety of fin geometries The award of two Ph for work in refrigeration has been recommended this session