Numerical Study on the Effect of the Pipe Groove Height and Pitch on the Flow Characteristics of Corrugated Pipe

Ki-Bea Hong, Dong-Woo Kim, Jihyun Kwark, Jun-Seok Nam and Hong-Sun Ryou
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Ki-Bea Hong: School of Mechanical, Automotive and Aeronautical Engineering, Korea National University of Transportaion, Chungju-si 27469, Korea
Dong-Woo Kim: School of Mechanical System Engineering, Chung-Ang University, Seoul 06974, Korea
Jihyun Kwark: Fire Insurers Laboratories of Korea, Yeoju-si 12661, Korea
Jun-Seok Nam: Big Anvil Co. Ltd., Yongin-si 17128, Korea
Hong-Sun Ryou: School of Mechanical System Engineering, Chung-Ang University, Seoul 06974, Korea

Energies, 2021, vol. 14, issue 9, 1-15

Abstract: For corrugated pipes with a square groove, it is known that there is no interaction between the main flow and groove flow when the aspect ratio is less than four. When the groove length and height are different, the interaction occurs in the pipe. In previous studies, it was investigated whether this interaction is dependent on groove length. However, when changing the groove height, the shape of the vortex generated inside the groove changes, which may cause the interaction to occur. Therefore, in this paper the interaction between the main and groove flow of corrugated pipes is investigated when changing both groove height as well as groove pitch, corresponding to an aspect ratio of less than four. For the groove height, the flow out of the groove after impingement changes with the shape of the secondary vortex in the groove. This flow deforms the velocity distribution in the main flow, and thus the friction factor is different. For the groove pitch, there is no difference in v -velocity distribution at the interface at the 5th and 20th groove. This means there is no interaction between the grooves, and, the friction factor differs as the number of grooves differs.

Keywords: corrugated pipe; friction factors; numerical; velocity; vortex (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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