Heat transfer enhancement inside a constant temperature pipe via clockwise and counter-clockwise twisted triangle turbulators, applicable in IC engine system
This study investigated the impact of innovative clockwise and counter-clockwise twisted triangle-shaped turbulators on thermal-fractional parameters within a constant surface temperature pipe. One of the key features of this turbulator is its unique geometry, which combines the characteristics of t...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24017039 |
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| author | Hongliang Wang Azher M. Abed Pinank Patel Nagaraj Patil Hamdi Ayed Abir Mouldi Ibrahim Mahariq |
| author_facet | Hongliang Wang Azher M. Abed Pinank Patel Nagaraj Patil Hamdi Ayed Abir Mouldi Ibrahim Mahariq |
| author_sort | Hongliang Wang |
| collection | DOAJ |
| description | This study investigated the impact of innovative clockwise and counter-clockwise twisted triangle-shaped turbulators on thermal-fractional parameters within a constant surface temperature pipe. One of the key features of this turbulator is its unique geometry, which combines the characteristics of twisted tape and louvered strip turbulators. This design allows for the simultaneous generation of radial and swirling flows within the pipe. The effects of various parameters such as twist angles between 60 and 270°, pitch distances from 0 to 10 mm, and different twisting direction sequences were studied. The findings indicate that increasing the twist angle up to 270° simultaneously enhances the Nusselt number and friction factor. However, while the thermal enhancement factor (TEF) increases with a twist angle up to 120°, it begins to decline at angles greater than 120°. Additionally, the results show that increasing the pitch distance up to 5 mm yields improvements in both heat transfer and TEF; however, beyond this distance, both parameters start to decrease. Moreover, the use of this turbulator can increase heat transfer by as much as 4.45 times compared to a smooth pipe. The maximum TEF achieved is 2.66, which occurs with a configuration of three clockwise and three counterclockwise triangle-shaped turbulators at a twist angle of 120° and a pitch distance of 5 mm. |
| format | Article |
| id | doaj-art-770e1fb2172c46ff96c2eb39cb653be0 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-770e1fb2172c46ff96c2eb39cb653be02025-01-08T04:52:51ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105672Heat transfer enhancement inside a constant temperature pipe via clockwise and counter-clockwise twisted triangle turbulators, applicable in IC engine systemHongliang Wang0Azher M. Abed1Pinank Patel2Nagaraj Patil3Hamdi Ayed4Abir Mouldi5Ibrahim Mahariq6School of Mechanical Engineering, Xijing University, 710123, Xi'an, Shaanxi, ChinaAir Conditioning and Refrigeration Techniques Engineering Department, College of Engineering and Technologies, Al-Mustaqbal University, 51001, Babylon, Iraq; Al - Mustaqbal Center for energy research, Al-Mustaqbal University, 51001, Babylon, Iraq; Corresponding author. Al - Mustaqbal Center for energy research, Al-Mustaqbal University, 51001, Babylon, Iraq.Department of Mechanical Engineering, Faculty of Engineering & Technology Marwadi University, Rajkot, Gujarat, India; Corresponding author. Department of Mechanical Engineering, Faculty of Engineering & Technology Marwadi University, Rajkot, Gujarat, India.Department of Mechanical Engineering, School of Engineering and Technology, JAIN (Deemed to be University), Bangalore, Karnataka, IndiaDepartment of Civil Engineering, College of Engineering, King Khalid University, 61421, Abha, Saudi ArabiaDepartment of Industrial Engineering, College of Engineering, King Khalid University, 61421, Abha, Saudi ArabiaGUST Engineering and Applied Innovation Research Center (GEAR), Gulf University for Science and Technology, Mishref, Kuwait; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan; Corresponding author. Al - Mustaqbal Center for energy research, Al-Mustaqbal University, 51001, Babylon, Iraq.This study investigated the impact of innovative clockwise and counter-clockwise twisted triangle-shaped turbulators on thermal-fractional parameters within a constant surface temperature pipe. One of the key features of this turbulator is its unique geometry, which combines the characteristics of twisted tape and louvered strip turbulators. This design allows for the simultaneous generation of radial and swirling flows within the pipe. The effects of various parameters such as twist angles between 60 and 270°, pitch distances from 0 to 10 mm, and different twisting direction sequences were studied. The findings indicate that increasing the twist angle up to 270° simultaneously enhances the Nusselt number and friction factor. However, while the thermal enhancement factor (TEF) increases with a twist angle up to 120°, it begins to decline at angles greater than 120°. Additionally, the results show that increasing the pitch distance up to 5 mm yields improvements in both heat transfer and TEF; however, beyond this distance, both parameters start to decrease. Moreover, the use of this turbulator can increase heat transfer by as much as 4.45 times compared to a smooth pipe. The maximum TEF achieved is 2.66, which occurs with a configuration of three clockwise and three counterclockwise triangle-shaped turbulators at a twist angle of 120° and a pitch distance of 5 mm.http://www.sciencedirect.com/science/article/pii/S2214157X24017039Twisted triangle shape turbulatorClockwise and counterclockwise configurationHeat transferPressure drop |
| spellingShingle | Hongliang Wang Azher M. Abed Pinank Patel Nagaraj Patil Hamdi Ayed Abir Mouldi Ibrahim Mahariq Heat transfer enhancement inside a constant temperature pipe via clockwise and counter-clockwise twisted triangle turbulators, applicable in IC engine system Case Studies in Thermal Engineering Twisted triangle shape turbulator Clockwise and counterclockwise configuration Heat transfer Pressure drop |
| title | Heat transfer enhancement inside a constant temperature pipe via clockwise and counter-clockwise twisted triangle turbulators, applicable in IC engine system |
| title_full | Heat transfer enhancement inside a constant temperature pipe via clockwise and counter-clockwise twisted triangle turbulators, applicable in IC engine system |
| title_fullStr | Heat transfer enhancement inside a constant temperature pipe via clockwise and counter-clockwise twisted triangle turbulators, applicable in IC engine system |
| title_full_unstemmed | Heat transfer enhancement inside a constant temperature pipe via clockwise and counter-clockwise twisted triangle turbulators, applicable in IC engine system |
| title_short | Heat transfer enhancement inside a constant temperature pipe via clockwise and counter-clockwise twisted triangle turbulators, applicable in IC engine system |
| title_sort | heat transfer enhancement inside a constant temperature pipe via clockwise and counter clockwise twisted triangle turbulators applicable in ic engine system |
| topic | Twisted triangle shape turbulator Clockwise and counterclockwise configuration Heat transfer Pressure drop |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24017039 |
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