Resumen de Design, study and optimisation of a pneumatic spinning nozzle through finite element modelling and experimental analysis
Air jet is the most promising staple fibre spinning technology in terms of productivity and yarn quality; however, it is being introduced slowly in the market worldwide. Although potentially it can reach very high productivity in comparison with other conventional systems, it still has some performance limitations avoiding its complete success.
This thesis has been focused in the study of the fluid dynamics inside the spinning nozzle which is the core of the air-jet spinning technology; the studied air flow drives the fibres during the yarn formation process. The generated knowledge has been used to study the behaviour of the nozzle under different working conditions and finally develop and analyse alternative designs until a satisfactory new spinning device has been reached.
From the system¿s performance point of view, the key objectives targeted have been the improvement of the yarn regularity and tenacity, the reduction of the raw material waste and the optimisation of the nozzle energetic efficiency
