@ARTICLE{Rusanov_Andrii_The_2021, author={Rusanov, Andrii and Rusanov, Roman}, volume={vol. 42}, number={No 1}, pages={97-114}, journal={Archives of Thermodynamics}, howpublished={online}, year={2021}, publisher={The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences}, abstract={The results of a systematic study of the influence of meridional contours overlap in the stator-rotor axial interspace of the impulse and reactive type stages of a high-pressure steam turbine on the flow structure and gas-dynamic efficiency of the flow part are introduced. The studied flow parts of the impulse and reactive stages are typical for high-power high-pressure steam turbines. It is shown that the stages that have no overlaps and/or have a smooth shape of meridional contours have the best gasdynamic efficiency, and the most negative effect on the flow part is caused by the presence of caverns in the stator-rotor interspace. For cases where, due to technological limitations, it is impossible to avoid the presence of caverns and overlaps with a sharp (step-wise) change in the shape of the meridional contours, it is recommended to perform overlaps with positive size of overlap values near the rotor blades.}, type={Article}, title={The influence of stator-rotor interspace overlap of meridional contours on the efficiency of high-pressure steam turbine stages}, URL={http://ochroma.man.poznan.pl/Content/119570/art06.pdf}, doi={10.24425/ather.2021.136949}, keywords={High-pressure steam turbine, Cavern, Overlap, Impulse type stage, Reactive type stage}, }