Theorical Analysis of New Propeller Type Turbulator Design in Parallel Flow Double Tube Heat Exchanger
Öz
In this study, the usage purposes of turbulators are mentioned. The advantages and disadvantages of two different turbulator models are examined. In addition, the working principle of the turbulator was examined to create the analysis conditions. Parts used in turbulators and their alternatives are introduced. The necessary engineering calculations for the analysis were made, the flow analysis to be applied to the turbulator was made and the results were interpreted. Flow simulation, one of the simulation plug-ins containing the SolidWorks commercial program, was used in the analysis. Also turbulator analysis; it was made to determine fluid pressure, fluid velocity, fluid temperature, turbulent energy, turbulent viscosity. The heat exchanger is approximately 1000 mm long. For the turbulators, copper material was chosen as its thermal conductivity is better than aluminum. In the study conducted with two types of turbulators; numerical simulation results were calculated as 4,771 Mpa, 20,15 0C, 211,168 J/kg, 14,81 Pa.s for the spring turbulator, while these values were calculated as 7,811 Mpa, 20,32 0C, 165,518 J/kg, 18,62 Pa.s for the propeller turbulator. In addition, it has been observed that the fluid velocities are 61.5 m/s for the spring turbulator and about 75 m/s for the propeller turbulator. Due to the continuous increase in turbulent energy and turbulent viscosity over time, it has been recommended to use a finned turbulator instead of a spring tube. When all these results are examined, it will open new ideas and fields of study to further improve the overall thermal-aerodynamic performance of turbulators. In this study, a design that will be an alternative to turbulator designs has been realized.
Anahtar Kelimeler
Kaynakça
- Chen and et al., 2020, Thermal-fluidic correlations for turbulent flow in a serpentine heat exchanger with novel wing-shaped turbulators, International Journal of Heat and Mass Transfer, 160, 120220.
- Ganji et al., 2016, Effect of discontinuous helical turbulators on heat transfer characteristics of double pipe water to air heat exchanger, Energy Conversion and Management, 118, 75-87.
- Guo, C., Wang, T., Hua, X., Tang, D., Experimental and theoretical investigation on two-phase flow characteristics and pressure drop during flow condensation in heat transport pipeline. Applied Thermal Engineering, 66, p 365-37
- Karakaya H. and Durmuş A., 2013, Heat Transfer and Exergy Loss in Conical Spring Turbulators, International Journal of Heat and Mass Transfer,60, 756762.
- Promvonge P. And Eiamsa-ard S., 2006, Experimental Investigation of Heat Transfer and Friction Characteristics in a Circular Tube Fitted with V-Nozzle Turbulators, International Journal Heat and Mass Transfer, 33, 591-600.
- Yadav, S. and Sahu, S. 2020, Effect of helical surface disc turbulator on thermal and friction characteristics of double pipe water to air heat exchanger, Experimental Heat Transfer, 34, 51-67.
- Xin-Cheng Tu ., Yuting Wua, Hyoung-Bum Kim.,Improvement of two-phase flow distribution in the header of a plate-fin heat exchanger.,International Journal of Heat and Mass Transfer 123 (2018),p 523–533.
- Xiong et al., 2021, 3D Numerical Study of Conical and Fusiform Turbulators for Heat Transfer Improvement in a Double-Pipe Heat Exchanger, International Journal of Heat and Mass Transfer, 170, 120995.
- Cengel and Cimbala 2008, Fluid Mechanics Fundementals and Aplications, page 406.
- Steel, H.S. et al., 2019, The Effect of The Addition of Ellipse Discharged Winged Turbulator to the Pipe Interior Surfaces of a Water heater Heater, 14. National Plumbing Engineering Congress, Izmir, 1149-1167.
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