Bir Yeraltı Madeninde Kullanılan Eksenel Fanın Verimliliğini Artırmak İçin Yeni Bir Kanat Tasarımının Araştırılması

Yıl 2024, Cilt: 14 Sayı: 3, 144 - 162, 25.11.2024

Güneyhan Taşkaya Beytullah Erdogan

Öz

Bir yeraltı madeninin havalandırılmasında kullanılan 40 cm çapındaki ön statorlu silindirik kanallı eksenel fanın kanat geometrisi yeniden tasarlanmıştır. Mevcut fanın Bilgisayar Destekli Tasarım (CAD) geometrisi çıkarılmış ve tüm parametreler analiz edilmiştir. Gerçek fanın geometrik özellikleri sabit tutularak sistem gereksinimlerine göre yeniden bir tasarım yapılmış ve gerekli kaldırma kuvvetini sağlayacak yeni bir kanat profili seçilmiştir. Ulusal Havacılık Danışma Komitesi (NACA) 747A315 ve 6412 kanat profillerine ek olarak NACA 63-412 kanat profilinin Hesaplamalı Akışkanlar Dinamiği (HAD) analizi yapılmış ve kanat performans oranları (CL/CD) belirlenmiştir. NACA 63-412 kanat profili kullanılarak tasarlanan rotor geometrisi ile mevcut fan geometrisi CAD ortamında birleştirilmiştir. Yeni fanın CFD sonuçları mevcut fanın sonuçları ile karşılaştırılmış ve yeni fanda farklı dönüş hızlarında kütlesel debide %45’e varan bir artış sağlanmıştır. Buna göre mevcut fanda 3700, 4000, 4700 devir/dakika ve 2 kg/s sabit debide yeni fan tasarımında 2.5, 2.75, 2.87 kg/s kütle debileri ile sırasıyla %25, %37.5 ve %43.5 performans artışları elde edilmiştir.

Anahtar Kelimeler

Airfoil, eksenel fan, HAD, fan kanatları, rotor, havalandırma

Investigation of a New Blade Design to Improve the Efficiency of an Axial Fan Used in an Underground Mine

Öz

The blade geometry of a 40 cm diameter axial fan with a front stator cylindrical duct used in the ventilation of an underground mine is redesigned. The Computer Aided Design (CAD) geometry of the existing fan was extracted and all parameters were analysed. Keeping the geometrical characteristics of the real fan constant, a redesign was made according to the system requirements and a new blade profile was selected to provide the required lifting force. In addition to National Advisory Committee for Aeronautics (NACA) 747A315 and NACA 6412 airfoils, Computational Fluid Dinamics (CFD) analysis of NACA 63-412 airfoil was performed and airfoil performance ratios (CL/CD) were determined. The rotor geometry designed using the NACA 63-412 airfoil and the existing fan geometry were combined in CAD environment. The CFD results of the new fan were compared with those of the existing fan The CFD results of the new fan were compared with the existing case. Accordingly, in the existing fan, at 3700, 4000, 4700 rpm and a constant flow rate of 2 kg/s, 25%, 37.5% and 43.5% performance increases were obtained with mass flow rates of 2.5, 2.75, 2.87 kg/s respectively in the new fan design.

Anahtar Kelimeler

Airfoil, axial fan, CFD, fan blades, rotor, ventilation

Kaynakça

• Bacak, A. 2016. Experimental and numerical analysis of axial fan performance analysed by methods. MSc Thesis, Department of Mechanical Engineering, Gebze Technical University, 57 s.
• Bakhtar, H., Alsahafi, N., Almehmadi, M. et al. 2024.Flow-induced noise and vibration in axial fan: a case study. Journal of Umm Al-Qura University for Engineering and Architecture.1, 1-18, Doi:10.1007/s43995-024-00079-9
• Castegnaro, S. A. 2017. Critical Analysis of the Differences Among Design Methods for Low-Speed Axial Fans. Proceedings of the ASME Turbo Expo., 26-30, USA. Doi: 10.1115/GT2017-64276
• Çakır, E. T. 2018. Effects of rotor-stator interaction surface modelling and shifting of airfoils on the performance of axial fans. MSc Thesis, Department of Mechanical Engineering, Istanbul Technical University, 97 s.
• Çengel, Y. A., Cimbala, J. M. 2018. Fluid Mechanics, Fundamental and Applications, Turbomachinery (4th ed). McGraw-Hill, New York, 825-827 pp.
• Çoban, M. 2019. Flow separation on an airfoil on a wing control by opening gap. MSc Thesis, Department of Mechanical Engineering, Sivas Cumhuriyet University, 126 s.
• Dilmaç, E. 2019. Naca 4415 wind turbine blade the effect of the edge of the fingertip on the profıle analysis. MSc Thesis, Department of Mechanical Engineering, Konya Technical University, 99 s.
• Drwiega, A., Szelka, M., Turewicz, A. 2019. Improvement of auxiliary ventilation efficiency in underground workings. IOP Con-ference Series: Earth and Environmental Science, 261(1). Doi:10.1088/1755-1315/261/1/012007.
• Fakhari, S. M., Mrad, H. 2024. Optimization of an axial-flow mine ventilation fan based on effects of design parameters. Results in Eng. 21, 101662. Doi:10.1016/j.rineng.2023.101662.
• Fan, C., Adjei, A.R., Wu, Y., Wang, A. 2020. Parametric study on the aerodynamic performance of a ducted-fan rotor using free-form method. Aerospace Science and Technology. 101, 105842. Doi:10.1016/j.ast.2020.105842.
• Fernando, V. N., Mudunkotuwa, D. Y. 2021. Bio-Inspired Aircraft Wing Modification Analysis in ANSYS Fluent. 10th International Conference on Information and Automation for Sustainability, Negambo, Sri Lanka, 11-13. Doi:10.1109/ICIAfS52090.2021.9605821
• Galpin, P., Hansen, T., Scheuerer, G., Kelly, R., Hickman, A., Jemcov, A., Morris, S. C. 2017. Validation of transonic axial compressor stage unsteady state rotor-stator simulations. Proceedings of the ASME Turbo Expo, 26-30, USA,
• Hassen, A. E. 2021. Flow characterization in mine ventilation fan blade design using CFD. Journal of Sustainable Mining. 20, 144–156. Doi:10.46873/2300-3960.1063.
• İlikan, N. A. 2014. Blade profile arrangement of axial fans effects on performance. PhD Thesis, Department of Mechanical Engineering, Istanbul Technical University, 212 s.
• Jung, J. H.; Joo, W. G. 2019. The effect of the entrance hub geometry on the efficiency in an axial flow fan. Intern. Journal of Refrigeration. 101, 90-97. Doi:10.1016/j.ijrefrig.2019.02.026.
• Keklikoğlu, Ö. H. 2019. Design, construction and performance evaluation of axial flow fans. MSc Thesis, Department of Mechanical Engineering, Middle East Technical University, 127 s.
• Kong, C., Wang, M., Jin, T. et al. 2023. The blade shape optimization of a low-pressure axial fan using the surrogate-based multi-objective optimization method. Journal of Mechanical Science and Technology. 37, 179–189. Doi:10.1007/s12206-022-1219-y.
• Korkmaz, Ü. 2018. Adjustable wing design to delay stall. MSc Thesis, Aircraft and Aerospacing Engineering, Gaziantep University, 51 s.
• Köse, Ö. 2018. Axial gas turbines wing parameters analysis. MSc Thesis, Mechanical Engineering Department, Iskenderun Technical University, 76 s.
• Krasyuk, A.M., Kosykh, P.V. 2023. Aerodynamic Design of Axial Fan with Guide Vane for Reverse Air Flow. Journal of Mining Science. 59, 424-432. Doi:10.1134/S1062739123030092.
• Luo, D., Huang, D., Sun, X., Chen, X., Zheng, Z. A. 2017. Computational Study on the Performance Improvement of Low-Speed Axial Flow Fans with Microplates. Journal Applied Fluid Mechanics. 10, 1735-3645. Doi:10.29252/JAFM.73.245.27492.
• Panigrahi, D. C., Mishra, D. P. 2014. CFD Simulations for the Selection of an Appropriate Blade Profile for Improving Energy Efficiency in Axial Flow Mine Ventilation Fans. Journal of Sustainable Mining. 13, 15-21. Doi:10.7424/jsm140104.
• Park, K., Choi, H., Choi, S., Sa, Y. 2019. Effect of a casing fence on the tip-leakage flow of an axial flow fan. International Journal of Heat and Fluid Flow. 77, 157-170. Doi:10.1016/j.ijheatfluidflow.2019.04.005.
• Tonello, N., Eudel, Y., Meux, L., Ferrand, M. 2017. Frozen Rotor and Sliding Mesh Models Applied to the 3D Simulation of the Francis 99 Tokke Turbine with Code Saturne. Journal of Physics Conference Series. 782, 012009. Doi:10.1088/1742-6596/782/1/01200.
• Yılmaz, M., Köten, H., Çetinkaya, E., Coşar, Z. A. 2018. A Comparative CFD analysis of NACA0012 and NACA4412 airfoils. Journal of Energy Systems. 2, 145–159. Doi:10.30521/jes.454193.