Effect of different corrugation interruptions Parameters on thermohydrodynamic characteristics and heat transfer performance of 3D Three-dimensional corrugated tube. (April 2022)

• Record Type: Journal Article
• Authors: Al-Obaidi, Ahmed Ramadhan; Alhamid, Jassim; Khalaf, Hussam Ali
• Is Part Of: Case studies in thermal engineering. Volume 32(2022)
• Publication Date: 2022-04
• Subjects: Corrugation interruptions configurations -- Thermohydrodynamic characteristics -- Enhancement of heat performance -- 3D corrugated pipe; Heat engineering -- Case studies -- Periodicals; 621.40205
• DOI: 10.1016/j.csite.2022.101879
• Languages: English
• ISSNs: 2214-157X

Abstract

Abstract: The use og internal corrugated tubes with varying Reynolds numbers (Re) at a constant wall heat flux, we examine the effects of mixing secondary, spiral, and swirl flows on heat transfer and pressure drop. Furthermore, varying flow analysis is applied to examine the flow resistance, heat transfer, and other design parameters. Our research indicates that heat transfer enhancement can be attributed to two factors. First In corrugated configurations, convective heat transfer is transformed into jet impingement heat transfer. Second, the boundary layer on the leeside of the corrugation was dramatically redeveloped by pulsation. Heat transfer performance is significantly improved and pressure drop is increased due to the spiral flow. Additionally, different corrugated geometrical configurations are used to investigate the flow behaviour based on Nusselt numbers (Nu) and friction coefficients ( f ) corresponding to the analyse values, and the design parameters such as corrugated ring angle (CRA), corrugated ring diameter (CRD), and a corrugated ring number (NCR). The result indicates that the Nu tend to increase as increases of the Re. The Nu value increases at higher corrugated geometrical configurations increase. Using different corrugated geometric configurations can result in performance superior to smooth pipes because the performance evaluation factor (PEF) value is higher than unity. Both PEF and Re increments, as well as the PEF value, demonstrate a reducing trend.