Experimental research on heat transfer of water in tubes with conical ring inserts in transient regime

Anvari, A.R.; Lotfi, Roghayyeh; Rashidi, Alimorad; Sattari, Sourena

doi:10.1016/j.icheatmasstransfer.2011.03.016

Cited by 40 publications

(9 citation statements)

References 13 publications

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“…Yakut and Sahin [14] investigated the effect of conical turbulators on heat transfer, pressure drop and flow-induced vibrations in turbulent flow. Anvari et al [15] reported the effect of the conical turbulator on heat transfer using water as a test liquid. Promvonge and Eiamsa-ard [16] investigated the effect of heat transfer on the combined conical ring and twisted tape for twist ratios ranging from 3.75 to 7.5.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the effect of wave turbulators on heat transfer in pipes

et al. 2022

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This experimental study deals with the heat transfer and friction effects of sinusoidal part turbulators for single-phase flows occurring in a circular shaped pipe. Turbulators with three different radius values are placed in the pipe to make the flow turbulent. In this way, changes in Nusselt number and friction coefficient are examined. As a result of the experiments made with Reynolds numbers in the range of 6614-20710, the increase rates of the Nusselt numbers of turbulators with 20 mm, 110 mm and 220 mm radius compared to the empty pipe were obtained as 153.49%, 85.36%, and 52.09%, respectively. As a result of the decrease in the radius, there was an increase in the Nusselt number and the friction factor. Parallel to the Nusselt number, the highest friction factor was obtained in the smallest radius turbulator. It was found that the thermal enhancement factors of 110 mm and 220 mm radius turbulators increased by 179.54% and 132.95%, respectively, compared to the 20 mm radius turbulator. Similarly, it was determined that the thermal enhancement factor of the 110 mm radius turbulator increased by 20% compared to the 220 mm radius turbulator.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation of the effect of wave turbulators on heat transfer in pipes

et al. 2022

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“…The gained results were demonstrated that the the diverging conical tabulators for minimum pitch ratio lead to the larger rate of heat transfer than other arrangement. Anvari et al [10] also described the effect of conical ring arrangements (diverge conical and converge conical) fitted in a horizontal tube on the heat transfer. The experiments were conducted in the transient flow regime.…”

Section: Introductionmentioning

confidence: 99%

Intensification of turbulent heat transfer in a circular tube by inserting different configuration of finned converging-diverging nozzles turbulators

K.Ali

Mushatet

2020

TUJES

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“…Anvari ve diğ. [6], Konik boru eklentili yatay borularda suyun zorlanmış taşınımını deneysel olarak çalışmışlardır. Onlar, deneysel sonuçlardan Nusselt sayısına ait iki adet denklem elde etmişlerdir.…”

Section: Introductionunclassified

Experimental investigation of effectiveness of heating tube with conical baffles

Yakar¹

2017

Pamukkale J Eng Sci

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Bu çalışmada, konik saptırıcılı ısıtıcı borunun farklı eğim açıları için etkinlikleri deneysel olarak araştırılmıştır. Eğilmiş konik saptırıcılar vasıtasıyla daha büyük vorteks akışlar sağlanarak ısı transferi artışı sağlanmış ve etkinlik bakımından en iyi eğim açısı belirlenmiştir. Deneyler, üç farklı eğim açısı (45°, 60° ve 80°) için gerçekleştirilmiştir. Çalışmada, ısıtılan akışkan olarak hava, ısıtıcı akışkan olarak ise su kullanılmıştır. Isıtıcı su sıcaklığı, 65 °C'da sabit tutulmuştur. 2-20 m/s arasında sekiz farklı hava akış hızı için deneysel sonuçlar elde edilmiştir. NTU>1 için elde edilen sonuçlar, 45° ve 80°'nin etkinliğinin, 60°'ile karşılaştırıldığında daha büyük olduğu gösterilmiştir. Buna ek olarak, NTU1 için ise üç açının etkinlik değerlerinin birbirine yakın olduğu bulunmuştur. In this paper, effectiveness of heated tube with conical baffles was studied experimentally as a function of various inclination angles. By using inclined conical baffles vortex of the flow was increased thereby giving rise to heat transfer and the best inclination angle was determined. Experiments were performed for three different inclination angles (45°, 60° ve 80°). Water as hot fluid and air as cold fluid were used as working fluids in the experiments. Water temperature was fixed as 65 °C. Air flow velocities were taken at 8 distinct levels between 2-20 m/s. The results indicated that for NTU>1, 45° and 80° were more effective compared to 60°. In addition for NTU1, all three angles were found to be similarly effective.

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Experimental research on heat transfer of water in tubes with conical ring inserts in transient regime

Cited by 40 publications

References 13 publications

Experimental investigation of the effect of wave turbulators on heat transfer in pipes

Experimental investigation of the effect of wave turbulators on heat transfer in pipes

Intensification of turbulent heat transfer in a circular tube by inserting different configuration of finned converging-diverging nozzles turbulators

Experimental investigation of effectiveness of heating tube with conical baffles

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