THERMAL SCIENCE

International Scientific Journal

Sendogan Karagoz

,

Semih Erzincanli

,

Orhan Yildirim

,

Ilker Firat

,

Mehmet Kaya

,

Omer Comakli

,

Gokhan Omeroglu

EXPERIMENTAL INVESTIGATION OF THE EFFECT OF WAVE TURBULATORS ON HEAT TRANSFER IN PIPES

ABSTRACT
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.
KEYWORDS
turbulator, heat transfer, friction factor, press drop, turbulent flow
PAPER SUBMITTED: 2021-02-06
PAPER REVISED: 2021-04-06
PAPER ACCEPTED: 2021-04-09
PUBLISHED ONLINE: 2021-05-16
DOI REFERENCE: https://doi.org/10.2298/TSCI210206183K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 2, PAGES [1771 - 1783]
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Experimental investigation of the effect of wave turbulators on heat transfer in pipes

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