Investigations of the Windage Losses of a High-Speed Shrouded Gear via the Lattice Boltzmann Method
To suppress the adverse effect of the gear windage phenomenon in the high-speed aeronautic industry, a shroud as an effective alternative strategy is usually to enclose gears to reduce the windage behaviors of high-speed gears. To deeply understand these no-load power losses, this paper proposes a n...
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MDPI AG
2024-10-01
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| author | Yu Dai Caihua Yang Xiang Zhu |
| author_facet | Yu Dai Caihua Yang Xiang Zhu |
| author_sort | Yu Dai |
| collection | DOAJ |
| description | To suppress the adverse effect of the gear windage phenomenon in the high-speed aeronautic industry, a shroud as an effective alternative strategy is usually to enclose gears to reduce the windage behaviors of high-speed gears. To deeply understand these no-load power losses, this paper proposes a new simulation methodology based on the Lattice Boltzmann method to study the windage losses of a shrouded spur gear and conducts a series of numerical studies. The models reproduce a shroud spur gear varying radial and axial clearances to evaluate the influence of casing walls on windage losses. The simulation results were then compared with experimental values, showing a satisfactory agreement. Furthermore, a torque containment factor integrating the air compressibility at high Mach numbers is introduced to represent the reduction in torque (windage power losses) for the shrouded gear compared to the free case, and the theoretical formulae for predicting windage power losses are further improved for better applicability as the tight shroud approaches the gear during the preliminary design stage. |
| format | Article |
| id | doaj-art-32e8cce0e75945aeb3499371cf87b716 |
| institution | OA Journals |
| issn | 2076-3417 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-32e8cce0e75945aeb3499371cf87b7162025-08-20T02:10:57ZengMDPI AGApplied Sciences2076-34172024-10-011420917410.3390/app14209174Investigations of the Windage Losses of a High-Speed Shrouded Gear via the Lattice Boltzmann MethodYu Dai0Caihua Yang1Xiang Zhu2College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaCollege of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaCollege of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaTo suppress the adverse effect of the gear windage phenomenon in the high-speed aeronautic industry, a shroud as an effective alternative strategy is usually to enclose gears to reduce the windage behaviors of high-speed gears. To deeply understand these no-load power losses, this paper proposes a new simulation methodology based on the Lattice Boltzmann method to study the windage losses of a shrouded spur gear and conducts a series of numerical studies. The models reproduce a shroud spur gear varying radial and axial clearances to evaluate the influence of casing walls on windage losses. The simulation results were then compared with experimental values, showing a satisfactory agreement. Furthermore, a torque containment factor integrating the air compressibility at high Mach numbers is introduced to represent the reduction in torque (windage power losses) for the shrouded gear compared to the free case, and the theoretical formulae for predicting windage power losses are further improved for better applicability as the tight shroud approaches the gear during the preliminary design stage.https://www.mdpi.com/2076-3417/14/20/9174windage lossesshroudhigh-speed geartorque containment factorair compressibility |
| spellingShingle | Yu Dai Caihua Yang Xiang Zhu Investigations of the Windage Losses of a High-Speed Shrouded Gear via the Lattice Boltzmann Method Applied Sciences windage losses shroud high-speed gear torque containment factor air compressibility |
| title | Investigations of the Windage Losses of a High-Speed Shrouded Gear via the Lattice Boltzmann Method |
| title_full | Investigations of the Windage Losses of a High-Speed Shrouded Gear via the Lattice Boltzmann Method |
| title_fullStr | Investigations of the Windage Losses of a High-Speed Shrouded Gear via the Lattice Boltzmann Method |
| title_full_unstemmed | Investigations of the Windage Losses of a High-Speed Shrouded Gear via the Lattice Boltzmann Method |
| title_short | Investigations of the Windage Losses of a High-Speed Shrouded Gear via the Lattice Boltzmann Method |
| title_sort | investigations of the windage losses of a high speed shrouded gear via the lattice boltzmann method |
| topic | windage losses shroud high-speed gear torque containment factor air compressibility |
| url | https://www.mdpi.com/2076-3417/14/20/9174 |
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