Numerical Modeling and Analysis of Hydro Turbine Draft Tube with Different Geometry Using Fluent
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 6
Abstract
the efficiency of a hydraulic reaction turbine is significantly affected by the performance of its draft tube. The shape and velocity distribution at the inlet are, in next turn, two main factors that affects the performance of the draft tube. Traditionally, the design of this component has been based on simplified analytic methods, experimental rules of thumb and model tests. In the last decade or two, the usage of computational fluid dynamics (cfd) has dramatically increased in the design process and will continue to grow due to is flexibility and cost-effectiveness. To provide electricity in off grid areas of the country, pico-hydro power plants are very good option. Harnessing of energy from falling water, is the hydro power, such as water falling through steep mountain as a waterfall. The flowing water energy is converted into useful mechanical power by means of a water turbine. In present work we have analyze the conical draft tube with varying cross section for mass flow rate of (1000 kg/s – 25000kg/s) and paper validation is also done with same boundary condition which is used in reference. In moody draft tube at mass flow rate of 25000 kg /s the velocity magnitude is low and pressure is increasing as compare to conical draft tube. Cfd simulation results shows that fluid flow steam is stable in nature at maximum mass flow rate in conical draft tube with varying cross section and turbulence effect is negligible at sharp edges due to curved effect.
Authors and Affiliations
Geet Agnihotri, Dr. A. C. Tiwari
Keywords
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