Numerical study on thermal performance of water flow in a twisted duct heat exchanger

• Autorzy: Rashed Musaab K. , Jehhef Kadhum Audaa , Badawy Faris Ali

Identyfikatory

DOI

10.2478/ijame-2022-0028

• Języki publikacji: EN

Abstrakty

EN

This paper presents a numerical study of heat transfer through a downstream annulus using water as the working fluid within the laminar flow region. The annulus consisted of an outer twisted square duct and an inner circular pipe. A three-dimensional formulation was used to solve the Navier-Stokes equations numerically for the laminar flow system with a low Reynolds number. Three parameters were used in the numerical simulation: the length of the twisted square [...] the inner diameter of the inner circular pipe [...] and 25 mm and the twist angle [...]. Numerical calculations were conducted on sixteen twisted square duct heat exchangers, with water flowing within a Reynolds number range of .220 1100− The results were illustrated as a profile of the thermal enhancement factor, the friction factor and the Nusselt number. The results show that the twisted outer duct of the heat exchanger can create a swirl flow along the length of the heat exchanger. It also caused a boundary layer separation-reattachment on the wall of the inner pipe. Moreover, an increase in the twist angle increased the Nusselt number by %,20 and the friction factor was also increased as the annular gap of the heat exchanger decreased.

Słowa kluczowe

EN

mixed convection; twisted square duct; heat exchanger; laminar flow

PL

konwekcja mieszana; wymiennik ciepła; przepływ laminarny

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2022
• Tom: Vol. 27, no. 2
• Strony: 199--216
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr.

Twórcy

autor

Rashed Musaab K.

• Middle Technical University, Institute of Technology, Baghdad/ Iraq

autor

Jehhef Kadhum Audaa

• Middle Technical University, Institute of Technology, Baghdad/ Iraq

autor

Badawy Faris Ali

• Middle Technical University, Institute of Technology, Baghdad/ Iraq

Bibliografia

• [1] Van der Vyver S. and Meyer J.P. (1997): Heat transfer augmentation in the annulus of a tube inside a twisted square tube.– R&D Journal, vol.13, No.3, pp.77–82.
• [2] Timité B., Jarrahi M., Castelain C. and Peerhossaini H. (2009): Pulsating flow for mixing intensification in a twisted curved pipe.– Journal of Fluids Engineering, vol.131, Article number 121104, p.10.
• [3] Bhattacharyya S., Chattopadhyay H., Pal T.K. and Roy A. (2016): Numerical investigation of thermohydraulic performance in elliptical twisted duct heat exchanger.– In: Mandal D.K., Syan C.S. (eds) CAD/CAM, Robotics and Factories of the Future. Lecture Notes in Mechanical Engineering. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2740-3_81.
• [4] Castelain C., Mokrani A., Le Guer Y. and Peerhossaini H. (2001): Experimental study of chaotic advection regime in a twisted duct flow.– Eur. J. Mech. part.B: Fluids, vol.20, pp.205-232.
• [5] Eiamsa-ard S. and Changcharoen W. (2015): Flow structure and heat transfer in a square duct fitted with dual/quadruple twisted-tapes: influence of tape configuration.– Journal of Mechanical Science and Technology, vol.29, No.8, pp.3501-3518.
• [6] Patil S. V. and Vijay Babu P.V. (2014): Laminar heat transfer augmentation through a square duct and circular tube fitted with twisted tapes.– Experimental Heat Transfer, vol.27, pp.124-143.
• [7] Promvonge P., Suwannapan Supattarachai, Monsak Pimsarn and Chinaruk Thianpong (2014): Experimental study on heat transfer in square duct with combined twisted-tape and winglet vortex generators.– Int. Commun. Heat Mass Transf., vol.59, pp.158-165.
• [8] Promvonge P. (2015): Thermal performance in square-duct heat exchanger with quadruple V-finned twisted tapes.– Applied Thermal Engineering, vol.91, pp.298-307.
• [9] Rashidi S., Akbarzadeh M., KarimiN. And Masoodi R. (2018): Combined effects of nanofluid and transverse twisted baffles on the flow structures, heat transfer and irreversibilities inside a square duct-A numerical study.– Applied Thermal Engineering, vol.130, pp.135-148.
• [10] Yang, S., Zhang Li and Hong Xu (2011): Experimental study on convective heat transfer and flow resistance characteristics of water flow in twisted elliptical tubes.– Applied Thermal Engineering, vol.31, pp.2981-2991.
• [11] Zhang L., Sheng Yang and Hong Xu (2012): Experimental study on condensation heat transfer characteristics of steam on horizontal twisted elliptical tubes.– Applied Energy, vol.97, pp.881-887.
• [12] Jehhef K.A., Badawy F.A. and Hussein A.A. (2021): Thermal performance enhancement of the mixed convection between two parallel plates by using triangular ribs.– International Journal of Applied Mechanics and Engineering, vol.26, No.2, pp.11-30.

Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)