CFD Calculation and Performance Analysis of ORC Radial Inflow Turbine
[1]MA Xinling,ZHANG Jingdi,MENG Xiangrui,et al.CFD Calculation and Performance Analysis of ORC Radial Inflow Turbine[J].Journal of Zhengzhou University (Engineering Science),2022,43(05):46-51.[doi:10.13705/j.issn.1671-6833.2022.05.009]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
43卷
Number of periods:
2022 05
Page number:
46-51
Column:
Public date:
2022-08-22
- Title:
- CFD Calculation and Performance Analysis of ORC Radial Inflow Turbine
- Keywords:
- radial inflow turbine; three-dimensional numerical simulation; isentropic efficiency; output power
- CLC:
- N032；TK14
- DOI:
- 10.13705/j.issn.1671-6833.2022.05.009
- Abstract:
- In order to predict the performance of the designed radial inflow turbine in design and off-design conditions, the three-dimensional computational fluid dynamics (CFD) simulation of radial inflow turbine was carried out by ANSYS CFX. The effects of turbine inlet temperature, rotational speed and pressure ratio on its performance were analyzed, and the CFD simulation results were verified by experimental data. The results showed that under the design condition, the CFD calculation results were very consistent with the one-dimensional design parameters, and the relative errors of isentropic efficiency and output power were 0.36% and 4.85%, respectively. Under the design rotational speed, the isentropic efficiency reached maximum 77.6% with the inlet temperature was 368 K.The output power increased with the increase of inlet temperature, the isentropic efficiency had a slight change and had high output power when the turbine was operating at 0.9 to 1.1 of the rotational speed ratio. The pressure ratio had a great influence on the isentropic efficiency of the turbine. Meanwhile, the turbine could better deal with the change of pressure ratio when operating at the design rotational speed and design inlet temperature. Taking the pressure ratio, isentropic efficiency and temperature drop as evaluation indexes, the experimental data were compared with the CFD calculation results. The results showed that the maximum relative errors were less than 10%, which could verify the reliability of CFD numerical simulation for turbine performance prediction.
- References:
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Last Update:
2022-08-20