ترجمه مقاله طراحی توربین

Big water turbines are some of the machines that produce power and we can use computational fluid dynamics method to design and analyze them. Nowadays considering finances and also the need of energy in industries, using the whole potential of a source and getting the most possible energy out of it is considered something important. After many years of experimenting and experiencing different turbines and considering the head and fluid rate based on increasing specific speed, the turbine type for the best performance are respectively impulse turbines, radial turbines, mixed flow turbines, and at last axial turbines. For heads lower than 5.4 meters, turbines (very low head)1 are used which besides their working conditions, we must consider their environmental effects and the development plans, and also having in mind that they are installed on rivers. In this research first we extract geometrical data regarding the head, output power and desired efficiency and then it will be designed using Solidworks software and then using numerical analysis in ansys cfx software, we determine the accuracy of produced geometry. After reaching the desired geometry, cross section of blades made of NACA standard airfoil which are two dimensional airfoils will be created. Initial designed geometry of the head is 2 meters, the power is 190 KW and efficiency is 90%. Also any change in geometrical parameters like Stagger angle (which determines the blade rotation) and external diameter and their effects on turbine performance are studied.