1
Assistant Professor, Malayer University, Malayer, Iran
2
Assistant Professor, Tehran Technical and Vocational University, Tehran, Iran
Abstract
This study used the finite volume method and ANSYS software to investigate the effect of elbow air duct vane structures on its performance. Elbow air ducts are among the most widely used ducts in HVAC systems, and changes in their geometry and structure have a significant impact on their performance. The purpose of this study is to investigate changes in the structure of elbow air duct vanes from simple to several different models. These changes include zigzag, semicircular, and sinusoidal vanes with different sizes and pitches, comparing them with a simple vane. Therefore, changes in the temperature, velocity and pressure fields of the air flow in the elbow duct are evaluated. The results of this research show that using zigzag vanes, with smaller pitches, whose lateral ends are facing downwards, causes more disturbance in the air flow in the elbow duct, and increases the heat transfer with the environment. The vane edge tips also had an impact on the amount of disturbance. Also, using sinusoidal vanes has reduced the pressure on the outer radial wall of the elbow air duct. So that, respectively, the use of sinusoidal and simple straight vanes created the lowest and highest pressure levels for the outer wall of the elbow air duct
Musavian, S.A., Maarefat, M., Madahian, R., Mohamad Kari, B.,, "Practical tips in designing common buildings in Iran based on natural ventilation," mechanical engineering of Amir Kabir,, vol. 53, no. 3, pp. 16-37, 2021.
Jafari, A., "Analysis of solar air collectors for the last five months of the year in Qaen city," journal of mechanical engineering, vol. 26, no. 114, pp. 69-80, 2017.
Menni, Y., et al., "Analysis of fluid dynamics and heat transfer in a rectangular duct with staggered baffles," Journal of Applied and Computational Mechanics, vol. 5, no. 2, pp. 231-248, 2019.
Menni, Y., A. Azzi, and A. Chamkha, "The solar air channels: comparative analysis, introduction of arc-shaped fins to improve the thermal transfer," Journal of Applied and Computational Mechanics, vol. 5, no. 4, pp. 616-626, 2019.
Sarreshtedari, A. and A. Zamani Aghaee, "Investigation of the thermo-hydraulic behavior of the fluid flow over a square ribbed channel," Journal of Heat and Mass Transfer Research, vol. 1, no. 2, pp. 101-106, 2014.
KARIMIZAD, G.F., A. SHAHSAVAND, and M.A.S. ALIKHANI, "EXPERIMENTAL INVESTIGATION AND MODELING OF SIMULTANEOUS HEAT & MASS TRANSFER IN THE HORIZONTAL CHANNEL WITH THE WALL EFFECT," 2011.
Mohebbi, R., "Investigation of fluid flow and heat transfer of free movement of square cavity in spite of hot triangular barrier with finite element method," Journal of Simulation in engineering, vol. 16, no. 55, pp. 361-373, 2018.
Salehin, A., MirAbdollah, A., "Influence of wall geometry and fluidity on the thermal-hydraulic performance of a corrugated channel in turbulent flow," Journal of Simulation in engineering, vol. 17, no. 57, pp. 273-283, 2019.
Razavi, S.E., Memar zade, A., "Numerical investigation of heat-fluid flow from obstacles with different geometric compositions," Iranian Journal of Mechanical Engineering, vol. 40, no. 2, pp. 21-29, 2010.
Nasiri, S., Taleb, Sh., Salimpoor, M. R., " Effect of grooved surfaces on heat transfer of pool water boiling and iron oxide / water Nano fluid," Modares Mechanical Engineering, vol. 18, no. 9, pp. 207-216, 2018.
Yari, S., Safarzadeh, H., "Investigating the optimal performance of solar air heaters by arranging obstacles in the air passage channel, using fuzzy logic," Journal of Solid and Fluid Mechanics, vol. 6, no. 4, pp. 329-341, 2016.
Heydarinejad, G., Soaai, M., "Investigation of the effect of inter-tunnel chimney geometry on the distribution of pollutants in the external environment," Modares Mechanical Engineering, vol. 17, no. 6, pp. 13-22, 2017.
dehshiri , p.a., salimpour, "pressure drop and heat transfer of nanofluid flow of Tio2/water in circular, square and rectangular channel," modares Mechanical Engineering, vol. 15, no. 5, pp. 377-382, 2015.(in persian).
bazai, h., azari, ahmad, moshtagh, "investigation the effect of geometry and type of nanofluids in heat transfer of micro channel with (CFD)," Numerical methods in engineering vol. 38, no. 1, pp. 63-79, 2019.( in persian).
F. Barzoki Nejati, G.A.S., M. Khoshvaght-Aliabadi, A.A. Abbasian Arani. , "Hydrothermal performance of trapezoidal fin equipped with vortex generator and hole : Investigation of the effect of vortex generator and hole position," Amirkabir j.Mech Eng, vol. 53, no. special issue 3, pp. 1963-1980, 2021.
Chen, Y., et al., "Three-dimensional numerical simulation of heat and fluid flow in noncircular microchannel heat sinks," International Communications in Heat and Mass Transfer, vol. 36, no. 9, pp. 917-920, 2009.
Gunnasegaran, P., et al., "The effect of geometrical parameters on heat transfer characteristics of microchannels heat sink with different shapes," International communications in heat and mass transfer, vol. 37, no. 8, pp. 1078-1086, 2010.
Hasan, M.I., et al., "Influence of channel geometry on the performance of a counter flow microchannel heat exchanger," International Journal of Thermal Sciences, vol. 48, no. 8, pp. 1607-1618, 2009.
Wang, H., Z. Chen, and J. Gao, "Influence of geometric parameters on flow and heat transfer performance of micro-channel heat sinks," Applied Thermal Engineering, vol. 107, pp. 870-879, 2016.
Yang, D., et al., "Numerical and experimental analysis of cooling performance of single-phase array microchannel heat sinks with different pin-fin configurations," Applied Thermal Engineering, vol. 112, pp. 1547-1556, 2017.
Hosseini, S., Sh. , Book of Mechanical Installation. 3, ed. A. Publisher. 2019, 207.
Launder, B.E. and D.B. Spalding, The numerical computation of turbulent flows, in Numerical prediction of flow, heat transfer, turbulence and combustion. 1983, Elsevier. p. 96-116.
Demartini, L.C., H.A. Vielmo, and S. Möller, "Numeric and experimental analysis of the turbulent flow through a channel with baffle plates," Journal of the Brazilian Society of Mechanical Sciences and Engineering, vol. 26, pp. 153-159, 2004.
shahrjerdi, A., & hosseini, S. S. (2023). Investigation the effect of fin shape on mechanical parameter of air that pass through elbow of air channels with numerical method. Fluid Mechanics & Aerodynamics, 12(1), 133-143.
MLA
ali shahrjerdi; seyed sharafoddin hosseini. "Investigation the effect of fin shape on mechanical parameter of air that pass through elbow of air channels with numerical method", Fluid Mechanics & Aerodynamics, 12, 1, 2023, 133-143.
HARVARD
shahrjerdi, A., hosseini, S. S. (2023). 'Investigation the effect of fin shape on mechanical parameter of air that pass through elbow of air channels with numerical method', Fluid Mechanics & Aerodynamics, 12(1), pp. 133-143.
VANCOUVER
shahrjerdi, A., hosseini, S. S. Investigation the effect of fin shape on mechanical parameter of air that pass through elbow of air channels with numerical method. Fluid Mechanics & Aerodynamics, 2023; 12(1): 133-143.