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Effects of trapezoidal and twisted trapezoidal tapes on turbulent heat transfer in tubes

Applied Thermal Engineering · Temmuz 2022

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YÖKSİS Kayıtları
Effects of trapezoidal and twisted trapezoidal tapes on turbulent heat transfer in tubes
Applied Thermal Engineering · 2022 SCI-Expanded
Dr. Öğr. Üyesi EYÜB CANLI →
YÖKSİS ISSN Eşleşmesi

Bu dergide (ISSN eşleşmesi) kurumun 7 kaydı bulundu.

YÖKSİS Kayıtları — ISSN Eşleşmesi
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2017 ISSN: 1359-4311 SCI-Expanded Q1
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Effects of trapezoidal and twisted trapezoidal tapes on turbulent heat transfer in tubes
2022 ISSN: 1359-4311 SCI-Expanded Q1
Dr. Öğr. Üyesi EYÜB CANLI →
The effect of pure methane energy fraction on combustion performance, energy analysis and environmental - economic cost indicators in a single-cylinder common rail methane-diesel dual fuel engine
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The effect of pure methane energy fraction on combustion performance, energy analysis and environmental - economic cost indicators in a single-cylinder common rail methane-diesel dual fuel engine
2023 ISSN: 1359-4311 SCI-Expanded Q1
Prof. Dr. MURAT CİNİVİZ →
The effect of pure methane energy fraction on combustion performance, energy analysis and environmental - economic cost indicators in a single-cylinder common rail methane-diesel dual fuel engine
2024 ISSN: 1359-4311 SCI-Expanded Q3
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Effect of methane injection strategy on combustion, exergetic performance, and enviro-economic analyses in a diesel/methane CRDI engine
2024 ISSN: 1359-4311 SCI-Expanded Q1
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Effect of spark plug position and ignition timing on performance, exergy, exergoeconomic, environmental, and enviro-cost in a hydrogen-SI engine
2025 ISSN: 1359-4311 SCI-Expanded Q2
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Makale Bilgileri

Dergi Applied Thermal Engineering
ISSN13594311
Yayın TarihiTemmuz 2022
Cilt / Sayfa211
DOI10.1016/j.applthermaleng.2022.118386
Scopus ID2-s2.0-85127493386
Özet Trapezoidal and twisted trapezoidal tape elements which are used for heat transfer enhancement in tubes are experimentally investigated. The effects of the tapes on heat transfer, pressure drop, and overall performance factor are analyzed. Three different thread heights are used in the experiments, which are obtained by dividing the tape width by 4, 6, and 10. Pitch length is kept constant for the trapezoidal tapes, while the constant twisting ratio is used for the twisted trapezoidal ones. Tapes were held in the tube with no wall contact by stretching mechanically. Experiments were conducted under constant heat flux boundary condition and for Reynolds number interval of 5000–25,000, targeting turbulent flow at which overall performance factor values reported in literature are relatively small comparing to laminar flow. The experimental results show that trapezoidal tape elements enhance heat transfer and increase pressure drop with changing rates depending on thread heights. Overall performance factor in the tested interval is detected over unity for two twisted trapezoidal inserts, making them significant alternatives comparing to the literature. The best thermal performance of 1.164 is obtained with the twisted trapezoidal tape element with the maximum thread height, while Nu is 90.52 and friction factor is 0.12. A maximum Nu of 118.46 is achieved with the proposed twisted trapezoidal tape, which is 1.9 times higher than the plain tube case and 1.57 times higher than the conventional twisted tape case. Since the twisted trapezoidal tapes perform better than the plain trapezoidal ones, it is concluded that the combination of the twisted and trapezoidal forms may be favorable in terms of heat transfer enhancement and overall performance factor regarding combination of swirl flow effect and periodical flow disturbance effect.

Yazarlar (3)

1
Aziz Hakan Altun
ORCID: 0000-0002-1546-1104
2
Haluk Nacak
3
Eyüb Canli
ORCID: 0000-0002-9358-1603

Anahtar Kelimeler

Forced convection Heat transfer enhancement Pressure drop in tubes Trapezoidal tape Turbulence Twisted tape

Kurumlar

Necmettin Erbakan Üniversitesi
Meram Turkey
Selçuk Üniversitesi
Selçuklu Turkey
Scimago Dergi (ISSN Eşleşmesi)
Applied Thermal Engineering
Q1
SJR Skoru1,579
H-Index224
YayıncıElsevier Ltd
ÜlkeUnited Kingdom
Energy Engineering and Power Technology (Q1)
Fluid Flow and Transfer Processes (Q1)
Industrial and Manufacturing Engineering (Q1)
Mechanical Engineering (Q1)
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