Abstract:
Determining the physical characteristics of substances is crucial in the number of sophisticated engineering applications. The physical characteristics of fluids (liquids and gases), such as thermal conductivity, specific heat, density, etc. have a great influence on the design of several engineering applications, such as heat exchangers. One of the goals of this study is to reinforce and enhance certain heat transport concepts, such as convection.
This research provides a comprehensive experimental analysis of the laminar and transitional behavior of five wire coils with various pitch sizes inside a smooth tube. The heat transfer and pressure drop inside a circular tube fitted with a coiled wired turbulator are reported for a turbulent regime with Reynolds number ranging from 2000 to 10000 and a Prandtl number of 0.7. Results have shown a considerable increase in the pressure drop proportional to the pitch of the spring and thickness of the wire. As compared to regular pipes and coiled pipes with different pitches, the heat transfer characteristics of the conical coil is superior. The conical sets with decreasing pitch appear to have the greatest effectiveness for this improvement. The highest value of the coefficient of friction is noted at Reynolds numbers ranging between 2200 and 3000.
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