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Journals / Nature Sciences / 2018 / Cilt: 13 Sayı: 1

NUMERICAL ANALYSIS OF HEAT TRANSFER ENHANCEMENT IN CONICAL-NOZZLE TURBULATORS INSERTED TUBE

Sibel GÜNEŞ
Toygun DAĞDEVİR
Orhan KEKLİKCİOĞLU
Veysel ÖZCEYHAN
Pages
7–17
Publication Date
2018-01-21
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The obtained results showed that smaller pitch ratios provided more heat transfer rate and pressure drop.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This numerical work is associated with the investigation of the effect of turbulator arrangement (diverging and converging) on heat transfer enhancement in conical nozzle turbulators inserted circular tube.
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Key Findings & Data:Three different pitch ratios (PR=2.5, 5 and 7.5) were considered in the numerical analyses, using air as test fluid.
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Conclusion & Impact:The obtained results showed that smaller pitch ratios provided more heat transfer rate and pressure drop.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Reverse Flow · Nozzle-Turbulator · Heat Transfer

Özet

This numerical work is associated with the investigation of the effect of turbulator arrangement (diverging and converging) on heat transfer enhancement in conical nozzle turbulators inserted circular tube. Three different pitch ratios (PR=2.5, 5 and 7.5) were considered in the numerical analyses, using air as test fluid. The numerical results of Nusselt number, friction factor and thermal performance factor were introduced for the range of Reynolds numbers of 6000-24000. The obtained results showed that smaller pitch ratios provided more heat transfer rate and pressure drop. As compared to converging nozzles, diverging nozzles generated more effective turbulance/reverse flow, and thus provided higher heat transfer and flow friction. Evidently, obtained results revealed that the usage of nozzle-turbulators as a turbulence/reverse flow generator has an important contribution on heat transfer improvement.

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Cite This Article

GÜNEŞ, S., DAĞDEVİR, T., KEKLİKCİOĞLU, O., ÖZCEYHAN, V. (2018). NUMERICAL ANALYSIS OF HEAT TRANSFER ENHANCEMENT IN CONICAL-NOZZLE TURBULATORS INSERTED TUBE. Nature Sciences, Cilt: 13 Sayı: 1, 7–17. https://ajindex.com/articles/1003588

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