Metodology of radial turbine design, operating with organic fluid, based in the development of preliminary design – CFD and optimization
This proposal deals with the development of a design methodology for a radial turbine operating with organic fluids (ORC) from the development of the preliminary design by applying optimization techniques based on the construction of meta-models. It is intended to develop a modern method with applications in radial turbomachinery, so ensure efficient and realistic projects. Based on the work of the tenderer doctorate, which was developed a computational code based on stochastic optimization algorithms and construction of meta-models with interpolations of radial basis function RBF will be applied this methodology in conjunction with the analysis of CFD - Computational Fluid Dynamics. Geometric parameterization based on Bezier curves or similar will be used for the treatment of design variables of the radial rotor channel, such as the optimization of the meridional channel, keeping fixed the input and output angles of the rotor as defined in preliminary design in order to increase isentropic efficiencies in the turbines to work with different fluids. For the calculation of the flow field on the turbine will be used CFD techniques, based on construction mesh and parametric geometries. Programs such FLUENT® and / or CFX may be used in integration with optimization models constructed based on metamodeling in order to make more representative of the physical response of the turbine and able to reduce the computational effort with regard to the number of function-objective evaluations. This kind of approach could be extended to other modalities of turbomachinery such as turbines, pumps, fans and compressors. And the product is one modern and efficient design methodology turbomachinery, to be transferred to domestic manufacturers of hydro-mechanical equipment.