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• W4313343185 abstract "Radial inflow turbines (RITs) play a vital role in power generation due to their small size, compact construction and large power density, especially when applying to supercritical CO $$_2$$ (sCO $$_2$$ ) Brayton power cycle. Correctly preliminary design of the RITs has an important function of enhancing the efficiency of the sCO $$_2$$ cycles. Most preliminary design studies for sCO $$_2$$ RITs simply impose empirically developed angle constraints for the rotor inlet flow conditions instead of giving much attention to the stator. In addition, the previous design procedure can only calculate one geometry at a time, which does not allow the selection of the most suitable geometry that fits the cycle parameters and matches constraints. To solve this problem, this chapter presents a methodology to correctly size a stator to achieve desired rotor inflow conditions. Then we conduct a stator design space analysis with 500 kW sCO $$_2$$ turbine rotor. Based on a number of given stator radius ratio $$frac{r_3}{r_4}$$ , blade number $$Z_s$$ and blade trailing edge thickness $$t_3$$ , the obtained design map contains a total number of $$N_frac{r_3}{r_4} times N_{Z_s} times N_t$$ preliminary design cases. These maps show trends of nozzle geometry and outflow that can aid a designer in selecting a preferred design. New insights are discussed, including: (1) the work-flow can correctly return the turbine stator geometry that allows the rotor inlet condition to reach to the design targets in theory; (2) the blade angles need to adjust between no-loss and loss cases, about 3.36°; (3) the rotor-stator interaction loss will increase the stator inlet/outlet operational parameter when guaranteeing the target rotor inlet conditions; and (4) including the stator losses in turbine design is very significant. This chapter will benefit the RIT stage design and is expected to be the focus of pilot studies in the near future for the energy conversion utility." @default.
• W4313343185 created "2023-01-06" @default.
• W4313343185 creator A5036002138 @default.
• W4313343185 date "2022-01-01" @default.
• W4313343185 modified "2023-09-26" @default.
• W4313343185 title "Development and Analysis of Design Trends for Supercritical $${mathrm{{CO}}_{2}}$$ Radial Inflow Turbine Nozzle Guide Vanes" @default.
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• W4313343185 doi "https://doi.org/10.1007/978-981-19-2860-4_4" @default.
• W4313343185 hasPublicationYear "2022" @default.
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