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Keywords = meridional entropy gradient

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18 pages, 6572 KiB  
Article
Improved Body Force Model for Estimating Off-Design Axial Compressor Performance
by Jia Huang, Yongzhao Lv, Aiguo Xia, Shengliang Zhang, Wei Tuo, Hongtao Xue, Yantao Sun and Xiuran He
Energies 2022, 15(12), 4389; https://doi.org/10.3390/en15124389 - 16 Jun 2022
Cited by 5 | Viewed by 1947
Abstract
Based on the COMSOL software, body forces substituted into the Reynolds-averaged Navier–Stokes (RANS) equations as the source terms instead of the actual blade rows were improved to better predict the compressor performance. Improvements in parallel body force modeling were implemented, central to which [...] Read more.
Based on the COMSOL software, body forces substituted into the Reynolds-averaged Navier–Stokes (RANS) equations as the source terms instead of the actual blade rows were improved to better predict the compressor performance. Improvements in parallel body force modeling were implemented, central to which were the local flow quantities. This ensured accurate and reliable off-design performance prediction. The parallel force magnitude mainly depended on the meridional entropy gradient extracted from three-dimensional (3D) steady single-passage RANS solutions. The COMSOL software could easily and accurately translate the pitchwise-averaged entropy into the grid points of the body force domain. A NASA Rotor 37 was used to quantify the improved body force model to represent the compressor. Compared with the previous model, the improved body force model was more efficient for the numerical calculations, and it agreed well with the experimental data and computational fluid dynamics (CFD) results. The results indicate that the improved body force model could quickly and efficiently capture the flow field through a turbomachinery blade row. Full article
(This article belongs to the Special Issue Advanced Propulsion System and Thermal Management Technology)
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