Rolls-royce has unveiled a new waterjet engine for naval, offshore and leisure markets that it claims offers more power, greater efficiency, reduced CO_2 emissions and better manoeuvrability for vessels. The company's Aluminium Waterjets division, based in Finland, developed the engine using advanced design, testing and production techniques to keep it light - at approximately 1,650kg - but powerful. Ari Haemynen, technical product manager, said: 'The main challenge was to reduce weight, and at the same time keep the production cost as low as possible. To achieve this, we optimised the wall thicknesses using 3D design so as not to have too much unnecessary material, and analysed the strength of the components using FEM (finite element method). We also used CFD (computational fluid dynamics)rnflow analysis to examine the pressures inside the waterjet unit, which are very high when it is in use.'
展开▼
