Calendar: 1968-1969 Page 438

xcvi Annual Report of the Delegacy University gave lecture on March 6th to postgraduate students and visitors on Optimizing control for engines for best poweir and fuel economy' Mr Nestorides of the British Internal Combustion Research Institute gave five lectures during May to students attending the course on Internal Combustion Engineering his subject being 'Engine dynamics' During January six lectures on Petroleum Technological Background were given to postgraduate mechanical engineering students Iby special- ists from the British Petroleum Research Centre In the Mechanical Engineering department the first batch of post- graduate students taking the new one-year course for the Sc com- pleted their courses successfully Research in internal-combustion engineering and fluid mechanics included theoretical and experimental studies of the mixing of liquid jet with air of combustion in the Wankel engine of engine-oil con- tamination and of air-flow measurement by ion-tracer techniques The work on turbo-charging on velocity measurements within cylinder and on ramming effects in high-speed engine continued while the investigation of inlet temperature and pressure changes on diesel-engine performance reached an advanced stage Research in powder technology continued and good progress was made in the investigation into the structural changes which occur in solid materials during milling The investigation into the energy necessary to initiate dust explo- sion by an electric spark is progressing and interesting results are being obtained in the research into the effect of the time of application of the force upon the comminution of glass The research into the fluid transport of granular materials in pipe- lines is in an advanced stage and papers were submitted for publication In the metallurgical laboratory research on the interaction of steels with molten sodium continued the work is now centred on the effect of alloying elements in steels silicon manganese nickel and chromium on the mass transfer behaviour of the carbon in the steel The high-temperature microscope stage was completed and metals heated by electron bombardment were observed at temperatures up to 000 Some work was also carried out on the effect of repeated impaction on the structure of metals The final stages of the work on two-phase flow of refrigerant were reached The research on the effect of motion of the cooling surface