TY - JOUR N2 - This paper analyses the influence of three different ring-type inlet duct geometries on the performance of a small 1 MW backpressure steam turbine. It examines the efficiency and pressure drop of seven turbine variants, including four spiral inlet geometries and three stages with a mass flow rate around 30 t/h. A one-pipe and two-pipe inlets are analysed from aerodynamical point of view, taking into account stator and rotor blades in three stages without the outlet. An outlet is added to the best variant. Also analysed is the occurrence of vortices in the inlets of the studied variants 1–7 as well as the efficiency, drop pressure, turbine power and mass flow. Finally, the best inlet for a 1 MW steam turbine is suggested. L1 - http://journals.pan.pl/Content/119567/PDF/art03.pdf L2 - http://journals.pan.pl/Content/119567 PY - 2021 IS - No 1 EP - 55 DO - 10.24425/ather.2021.136946 KW - CFD analysis KW - Steam turbine KW - Inlet A1 - Koprowski, Arkadiusz A1 - Rzadkowski, Romuald PB - The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences VL - vol. 42 DA - 2021.03.31 T1 - Computational fluid dynamics analysis of1 MW steam turbine inlet geometries SP - 35 UR - http://journals.pan.pl/dlibra/publication/edition/119567 T2 - Archives of Thermodynamics ER -