A Modified Loss Breakdown Approach for Axial Turbines Operating with Blended Supercritical Carbon Dioxide
نویسندگان
چکیده
Abstract In this paper, a modified loss breakdown approach is introduced for axial turbines operating with supercritical carbon dioxide (sCO2) mixtures using CFD results. Loss analysis has been previously developed two approaches, however each its own uncertainties. The first neglects the effects of cross-interaction between different sources, while second ignores potential changes to boundary layer thicknesses and source domains. Although methodology accounts interactions it may produce less accurate predictions compact machines like sCO2 where dominate flow passage. proposed aims obtain turbine single model all sources aerodynamic coexist, considering variable regions defined based on velocity entropy distribution A steady state, single-stage, single-passage, 3D numerical set up simulate verify audit methodology. results are verified against published methodologies 130 MW CO2/C6F6 blend. show good agreement multiple-model approaches from literature. However, existing appear overestimate endwall losses by 13~16% underestimate profile 11~31% compared approach. Compared mean line models, large differences in observed especially stator rotor losses.
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ژورنال
عنوان ژورنال: Journal of engineering for gas turbines and power
سال: 2023
ISSN: ['0742-4795', '1528-8919']
DOI: https://doi.org/10.1115/1.4062478