Investigation of Heat Transfer and Swirl Flow Between Concentric Cylinders
[ X ]
Tarih
2025
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Hashemite University
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Swirl flows, especially in decaying forms, have shown promise in enhancing thermal performance with minimal mechanical complexity, providing a practical alternative to traditional forced convection methods in annular geometries. The swirling flows are created by introducing tangential air inflow, which promotes mixing and disrupts thermal boundary layers, thereby increasing heat transfer. This approach is valuable in applications where efficient thermal management is critical, such as in heat exchangers, reactors, and rotating machinery. This study highlights the potential effectiveness of swirling decaying flows in enhancing heat transfer, as initially proposed by Talbot. Local Nusselt numbers were experimentally measured in an annular space between concentric cylinders under a constant heat flux boundary condition. Swirling air motion was generated by tangential inlet slots, allowing air to enter with varying slot numbers and tangency angles. The resulting flow field within the annulus maintained a Reynolds number below 2000, aligning with the study's focus on low-Reynolds, laminar flow conditions for examining the impact of swirl flow on heat transfer between concentric cylinders. Careful consideration was given to keeping track of errors from their collection of sources and their propagation in the results. In heat transfer enhancement, swirling flow showed real promise; augmentation of up to 24 % could be achieved, while in power consumption, swirling flow was considerably more demanding than the fully developed non-working laminar flow. Even with the acceptable accuracy of the experimental measurements, the data reduction yielded substantial errors - up to 300 % of the calculated value - thereby undermining the results and the assumptions.
Açıklama
Anahtar Kelimeler
Heat Transfer Enhancement, Swirling Flow, Uncertainty Analysis
Kaynak
Jordan Journal of Mechanical and Industrial Engineering
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
19
Sayı
1
Künye
Jasim, M. A., Alaiwi, Y., & Al-Khafaji, Z. (2025). Investigation of Heat Transfer and Swirl Flow Between Concentric Cylinders. Jordan Journal of Mechanical & Industrial Engineering, 19(1).
