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Numerical Simulation Research of Rectangular Fin Tube Drop about Flow and Heat Transfer Performance

Author: LiangXiaoQiang
Tutor: GuPingDao
School: Donghua University
Course: Heating,Gas Supply, Ventilation and Air Conditioning Engineering
Keywords: The rectangular fins drops shaped tube Numerical Simulation Heat transfer coefficient Flow resistance
CLC: TK124
Type: Master's thesis
Year: 2011
Downloads: 66
Quote: 0
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Abstract


Exceptionally rapid as the socio-economic progress , industrial development , growing shortage of energy , the energy crisis has become a global problem . In order to ease the energy shortage situation , the world vigorously promote energy-saving measures , energy-saving technology has become an important issue in the industry . In this paper, based on fluid mechanics theory and knowledge of heat transfer in this context , using numerical simulation study of the drop-shaped tube of rectangular fin heat transfer and flow performance . For the numerical simulation , first using Fluent software to simulate the flow and heat transfer performance of several different tube type heat transfer tube outer surface . And a variety of different boundary conditions - inlet velocity case were compared , and finally get a graph showing the relationship of speed and heat exchange relationship graph and velocity and flow resistance . And through analysis comparing the droplet -shaped tube flow and heat transfer performance , providing a basis for the numerical simulation of droplet -shaped tube of rectangular fins . In addition , in the third chapter of simulation studies based on different boundary conditions of the rectangular fin droplet -shaped tube parameters simulation analysis were different face velocity , ambient temperature , fin thickness , fin spacing , different tube length . The graph showing the relationship of the heat transfer coefficient and the face velocity ; graph showing the relationship of the flow resistance and the face velocity . The heat transfer coefficient and flow resistance is increased with the increase of face velocity . Ambient temperature of the heat transfer coefficient and pressure drop of the heat transfer tubes have little effect , but the impact of the heat transfer . In the same fin pitch , the fin thickness increases, the heat transfer coefficient and flow resistance increase . There exists an optimum value corresponding to a certain amount of face velocity , fin spacing , and gives the optimum value . Finally, the different length of the tube the rectangular fins drops shaped tube simulation study results show that : the length of the tube were higher than the tube length 100 mm 500 mm convective heat transfer coefficients and flow resistance . Moreover, with the windward speed increases , the difference is also a corresponding increase.

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Thermal Engineering Theory > Heat Transfer
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