Calendar: 1974-1975 Page 442

Annual Report of the Delegacy lxi of the complex velocity patterns within very confined spaces to be made more easily The investigation of cylinder air flow in reciprocat- ing internal combustion engines continues and interesting results have been obtained which can be used to relate power output and exhaust emissions from diesel engine with certain steady-flow characteristics of model cylinder head At the suggestion of the Fuel Injection and Combustion Panel of the influence of piston-crown combustion chamber designs on the flow pattern has been explored Work also continues on research into exhaust particulate emissions and secondary injection Work in the field of Powder Technology has made very satisfactory progress during the year The investigation into sieving and screening has led to mathematical theory of sieving and this has been verified by extensive experiment The process of screening has been simulated upon the computer upon the basis of the equations deduced for sieving and an empirical equation for the process has been deduced This equation has been verified by tests upon continuous screen and excellent agreement obtained It is with pleasure that it may be recorded that Dr English has received the Suttle Award of the Filtration Society for his contributions to knowledge in the field of Sieving and Screening The work upon comminution has led to an understanding of the comminution of heterogeneous materials both in simple particle and deep bed crushing and these results are expected to be of considerable use in mill design The investigation of the motion of free-flowing spherical particles in channels has led to an equation for the resistance to flow of such materials In work upon dust explosions empirical equations based upon the theories of heterogeneous and homogeneous chemical reac- tions have been developed and these appear to be of value in the estima- tion of the probability of occurrence of an explosion Professor Shuzo Matsumura of Hosci University Tokyo has been guest worker in the laboratory for 10 weeks and has collaborated with Dr English on an investigation into properties of heterogeneous beds FACULTY OF LAWS Number of Students Undergraduate 1st Year Intermediate 84 2nd Year Final Part 70 rd Year Final Part II 69