Effect of Coolant Inlet Mode on Heat Transfer Characteristics of a Twin-web Turbine Disc Cavity

Document Type : Regular Article

Authors

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

10.47176/jafm.18.4.2955

Abstract

Twin-web turbine discs have been the subject of recent research in an effort to lighten the weight of and boost the efficiency of aero engines. This has motivated researchers to investigate other configurations for an expanded blade air supply and twin-web turbine discs. However, the new configuration's cooling mechanism is unclear. In this paper, the flow and heat transfer characteristics of two twin-web turbine disc systems, featuring distinct coolant inlet modes, are investigated through theoretical analysis and numerical simulation. The research results show that the central inlet mode leads to an uneven coolant distribution, a high convective heat transfer coefficient, and a high Nusselt number in the rotor–stator cavity. Meanwhile, the pre-swirl inlet mode improves cooling in the high-temperature region by disturbing the vorticity. Augmenting the dimensionless mass flow rate enhances the cooling efficiency via the notable jet effect, but it also escalates energy loss. As the rotational Reynolds number rises, the entrainment effect of the rotor assumes a dominant role, thereby reducing the swirl ratio. The increased turbulence parameter shifts the primary heat transfer driver from the rotor register to the jet effect, resulting in more uniform temperature changes and a reduced radial inhomogeneity. The pre-swirl inlet mode demonstrates an outstanding cooling performance overall.

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Main Subjects

References

Bai, Y., Luo, X., & He, J. (2022). Influence of turbulence parameters on flow characteristicsof cavity with tubed vortex reducer. Journal of Aerospace Power, 37(6), 1295-1305
Bricaud, C., Geis, T., Dullenkopf, K., & Bauer, H. J. (2007). Measurement and Analysis of Aerodynamic and Thermodynamic Losses in Pre-Swirl System Arrangements. Proceedings of the ASME Turbo Expo 2007: Power for Land, Sea, and Air. 2007. https://doi.org/10.1115/gt2007-27191
Cao, Y., Xu, R., & Jiang, P. (2023). Physics-informed machine learning based RANS turbulence modeling convection heat transfer of supercritical pressure fluid. International Journal of Heat and Mass Transfer, 201, 123622. https://doi.org/10.1016/j.ijheatmasstransfer.2022.123622
Gao, W. J., Yue, Z. F., Li, L., Zhao, Z. N., & Tong, F. J. (2017). Numerical simulation on film cooling with compound angle of blade leading edge model for gas turbine. International Journal of Heat and Mass Transfer, 115, 839–855. https://doi.org/10.1016/j.ijheatmasstransfer.2017.07.105
Gong, W., Liu, G., Wang, J., Wang, F., Lin, A., & Wang, Z. (2022). Aerodynamic and thermodynamic analysis of an aero-engine pre-swirl system based on structure design and performance improvement. Aerospace Science and Technology, 123, 107466. https://doi.org/10.1016/j.ast.2022.107466
Guo, Y., Wang, S., & Shen, W. (2024). Genetic optimization of twin-web turbine disc cavities in aeroengines. Energies, 17(17), 4346. https://doi.org/10.3390/en17174346
Jarzombek, K., Dohmen, H. J., Benra, F. K., & Schneider, O. (2006). Flow Analysis in Gas Turbine Pre-Swirl Cooling Air Systems: Variation of Geometric Parameters. Proceedings of the ASME Turbo Expo 2006: Power for Land, Sea, and Air. https://doi.org/10.1115/gt2006-90445
Kim, Y. I., & Song, S. J. (2019). Unsteady measurement of core penetration flow caused by rotating geometric non-axisymmetry in a turbine rotor-stator disc cavity. Experimental Thermal and Fluid Science, 107, 118–129. https://doi.org/10.1016/j.expthermflusci.2019.05.017
Kong, X., Huang, T., Liu, Y., Chen, H., & Lu, H. (2022). Effects of pre-swirl radius on cooling performance of a rotor-stator pre-swirl system in gas turbine engines. Case Studies in Thermal Engineering, 37, 102250. https://doi.org/10.1016/j.csite.2022.102250
Lewis, P., Wilson, M., Lock, G. D., & Owen, J. M. (2008). Effect of radial location of nozzles on performance of preswirl systems: A computational and theoretical study. Proceedings of the Institution of Mechanical Engineers Part a Journal of Power and Energy, 223(2), 179–190. https://doi.org/10.1243/09576509jpe689
Li, L., Tang, Z., Li, H., Gao, W., Yue, Z., & Xie, G. (2020). Convective heat transfer characteristics of twin-web turbine disk with pin fins in the inner cavity. International Journal of Thermal Sciences, 152, 106303. https://doi.org/10.1016/j.ijthermalsci.2020.106303
Li, L., Tang, Z., Li, H., Tong, F., & Gao, W. (2019). Multidisciplinary design optimization of twin-web turbine disk with pin fins in inner cavity. Applied Thermal Engineering, 161, 114104. https://doi.org/10.1016/j.applthermaleng.2019.114104
Liao, G., Wang, X., & Li, J. (2014). Numerical investigation of the pre-swirl rotor–stator system of the first stage in gas turbine. Applied Thermal Engineering, 73(1), 940–952. https://doi.org/10.1016/j.applthermaleng.2014.08.054
Lin, A., Liu, G., Li, P., Zhang, Z., & Feng, Q. (2022). Theoretical and experimental evaluations of pre-swirl rotor-stator system with inner seal bypass configuration for turbine performance improvement. Energy, 258, 124760. https://doi.org/10.1016/j.energy.2022.124760
Lin, A., Liu, G., Wang, X., & Feng, Q. (2021). Comprehensive evaluations on performance and energy consumption of pre-swirl rotor–stator system in gas turbine engines. Energy Conversion and Management, 244, 114440. https://doi.org/10.1016/j.enconman.2021.114440
Liu, G., Gong, W., Wu, H., Pang, L., & Lin, A. (2021a). Theoretical and experimental evaluation of temperature drop and power consumption in a cover-plate pre-swirl system for gas turbine cooling. Case Studies in Thermal Engineering, 27, 101221. https://doi.org/10.1016/j.csite.2021.101221
Liu, Y., Lu, B., Kong, X., & Chen, H. (2023). Experimental study on the outlet flow field and cooling performance of vane-shaped pre-swirl nozzles in gas turbine engines. Case Studies in Thermal Engineering, 44, 102878. https://doi.org/10.1016/j.csite.2023.102878
Liu, Y., Yue, B., Kong, X., Chen, H., & Lu, H. (2021b). Design and performance analysis of a vane shaped rotating receiver hole in high radius pre-swirl systems for gas turbine cooling. Aerospace Science and Technology, 115, 106807. https://doi.org/10.1016/j.ast.2021.106807
Liu, Z., Ye, L., Wang, C., & Feng, Z. (2014). Numerical simulation on impingement and film composite cooling of blade leading edge model for gas turbine. Applied Thermal Engineering, 73(2), 1432–1443. https://doi.org/10.1016/j.applthermaleng.2014.05.060
Ma, A., Liu, F., Zhou, T., & Hu, R. (2021). Numerical investigation on heat transfer characteristics of twin-web turbine disk-cavity system. Applied Thermal Engineering, 184, 116268. https://doi.org/10.1016/j.applthermaleng.2020.116268
Ma, A., Wu, Q., Zhou, T., & Hu, R. (2022). Effect of inlet flow ratio on heat transfer characteristics of a novel twin-web turbine disk with receiving holes. Case Studies in Thermal Engineering, 34, 101990. https://doi.org/10.1016/j.csite.2022.101990
Ma, J., Liu, G., Li, J., Wu, C., Zhang, Y., & Lin, A. (2024). Evaluation of low power consumption and temperature drop potential in an aero-engine pre-swirl system for turbine performance improvement. Applied Energy, 359, 122601. https://doi.org/10.1016/j.apenergy.2023.122601
Owen, J. M., & Pincombe, J. R. (1980). Velocity measurements inside a rotating cylindrical cavity with a radial outflow of fluid. Journal of Fluid Mechanics, 99(1), 111–127. https://doi.org/10.1017/s0022112080000547
Xia, Z., Wang, S., & Zhang, J. (2020). A Novel design of cooling air supply system with dual row pre-swirl nozzles. Journal of Applied Fluid Mechanics, 13(04). https://doi.org/10.36884/jafm.13.04.30957
Xiang, L., Guoqiang, X., Zhi, T., & Shuiting, D. (2007). Flow and heat transfer in rotor-stator system with pre-swirl angle of 30°. Beijing Hangkong Hangtian Daxue Xuebao, 33(03), 290. https://bhxb.buaa.edu.cn/EN/abstract/abstract9550.shtml
Yan, C., Yin, Z., Shen, X., Mi, D., Guo, F., & Long, D. (2020). Surrogate-based optimization with improved support vector regression for non-circular vent hole on aero-engine turbine disk. Aerospace Science and Technology, 96, 105332. https://doi.org/10.1016/j.ast.2019.105332
Zhang, F., Wang, X., & Li, J. (2016a). Numerical investigation of flow and heat transfer characteristics in radial pre-swirl system with different pre-swirl nozzle angles. International Journal of Heat and Mass Transfer, 95, 984–995. https://doi.org/10.1016/j.ijheatmasstransfer.2016.01.010
Zhang, M., Gou, W., Li, L., Yang, F., & Yue, Z. (2016b). Multidisciplinary design and multi-objective optimization on guide fins of twin-web disk using Kriging surrogate model. Structural and Multidisciplinary Optimization, 55(1), 361–373. https://doi.org/10.1007/s00158-016-1488-0
Zhang, M., Gou, W., Yao, Q., Li, L., & Yue, Z. (2017). Investigation on heat transfer characteristic and optimization of the cooling air inlet for the twin-web turbine disk. Journal of Physics Conference Series, 885, 012011. https://doi.org/10.1088/1742-6596/885/1/012011
Zhang, M., Yao, Q., Sun, S., Li, L., & Hou, X. (2020). An efficient strategy for reliability-based multidisciplinary design optimization of twin-web disk with non-probabilistic model. Applied Mathematical Modelling, 82, 546–572. https://doi.org/10.1016/j.apm.2020.01.066
Zhou, K., & Zhou, C. (2020). Effects of upstream Rankine vortex on tip leakage vortex breakdown in a subsonic turbine. Aerospace Science and Technology, 99, 105776. https://doi.org/10.1016/j.ast.2020.105776

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History

  • Received: 28 June 2024
  • Revised: 15 September 2024
  • Accepted: 20 October 2024
  • Available online: 04 February 2025

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