Design of Radial-Inflow Turbines for Low-Temperature Organic Rankine Cycle

This study presents the development of a design method that has been extended to radial-inflow turbines operating in organic Rankine cycles (ORC). Both conventional and circulation available literature have reviewed. The two main limitations current make it not suitable for ORC turbine are lack real gas capability 3D blades with high stresses. Using method, flow field is decomposed into potential part rotational part. mean velocity periodic solved separately. To model thermodynamic properties gas, NIST REFPROP or CoolProp used. blade geometry then iteratively by assuming vector parallel surface. boundary condition modified force camber be radial-fibred, which helpful reduce centrifugal bending stress on blade. All formulations derived step step, numerical treatments, including grid generation, differentiation, computational scheme, convergence, discussed detail. validated designing R245fa rotor. performance rotor predicted CFD FEA simulations, compared results using other methodologies literature.