Abstract
This paper presents a comparison between the experimental and numerical simulations of turbulent swirling flow induced by twisted tape in vertical pipe. A novel measurement technique, phased array ultrasonic velocity profiler (UVP), has been developed for 2D velocity field visualization in swirling flow. A phased array with basic frequency 4 MHz has been designed, it has eight piezoelectric elements and each element transmits ultrasound beam. The advantage of this sensor is that the ultrasound beam can be controlled easily by changing the time delay of signal transmission for each element. A vector reconstruction algorithm is presented showing how the velocity vector of particles can be calculated from Doppler-shift frequencies taken from the output signals of two receiver elements. Two-dimensional velocity field has been visualized and it is found, as expected, that the presence of swirl cause a significant increase in the magnitude of the measured tangential velocity. Furthermore, a numerical calculation is performed and qualitatively compared with experimental results. The numerical result is obtained by solving three-dimensional, Reynolds-averaged Navier–Stokes equations by the commercial CFD code FLUENT® v.14.5 with RNG k-ε turbulence model. The qualitative comparison between phased array UVP and CFD results shows good agreement with the average velocity field. Experimental and numerical findings and parametric trends based on the effects of swirling flow are summarized and discussed.
Graphical abstract
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References
Agarwal SK, Raja Rao M (1996) Heat transfer augmentation for the flow of a viscous liquid in circular tubes using twisted tape inserts. Int J Heat Mass Transf 39(17):3547–3557. doi:10.1016/0017-9310(96)00039-7
Cazan R, Aidun CK (2009) Experimental investigation of the swirling flow and the helical vortices induced by a twisted tape inside a circular pipe. Phys Fluids 21(3):037102. doi:10.1063/1.3085699
Chang D, Tavoularis S (2015) Hybrid simulations of the near field of a split-vane spacer grid in a rod bundle. Int J Heat Fluid Flow 51:151–165. doi:10.1016/j.ijheatfluidflow.2014.07.005
Eiamsa-ard S, Wongcharee K, Eiamsa-ard P, Thianpong C (2010a) Heat transfer enhancement in a tube using delta-winglet twisted tape inserts. Appl Therm Eng 30(4):310–318. doi:10.1016/j.applthermaleng.2009.09.006
Eiamsa-Ard S, Thianpong C, Eiamsa-Ard P (2010b) Turbulent heat transfer enhancement by counter/co-swirling flow in a tube fitted with twin twisted tapes. Exp Therm Fluid Sci 34(1):53–62. doi:10.1016/j.expthermflusci.2009.09.002
Fukumoto T, Tsukada K, Ihara T, Tsuzuki N, Kikura H (2013) A study of phased array ultrasonic velocity profile monitor for flow rate measurement. In 2013 21st International Conference on Nuclear Engineering Paper No. ICONE21-16601, p 1–6 ASME. doi:10.1115/ICONE21-16601
Guo J, Fan A, Zhang X, Liu W (2011) A numerical study on heat transfer and friction factor characteristics of laminar flow in a circular tube fitted with center-cleared twisted tape. Int J Therm Sci 50(7):1263–1270. doi:10.1016/j.ijthermalsci.2011.02.010
Kasai C, Namekawa K, Koyano A, Omot R (1985) Real-time two-dimensional blood flow imaging using an autocorrelation technique. IEEE Trans Son Ultrason 32(3):458–464. doi:10.1109/T-SU.1985.31615
Kumar R, Conover T (1993) Flow visualization studies of a swirling flow in a cylinder. Exp Therm Fluid Sci 7(3):254–262. doi:10.1016/0894-1777(93)90009-8
Launder B, Spalding DB (1974) The numerical computation of turbulent flows. Comput Methods Appl Mech Eng 3:269–289. doi:10.1016/0045-7825(74)90029-2
Li H, Tomita Y (2000) Particle velocity and concentration characteristics in a horizontal dilute swirling flow pneumatic conveying. Powder Technol 107(1):144–152. doi:10.1016/S0032-5910(99)00181-3
Liu W, Bai B (2015) A numerical study on helical vortices induced by a short twisted tape in a circular pipe. Case Stud Therm Eng 5:134–142. doi:10.1016/j.csite.2015.03.003
Manglik RM, Bergles AE (1993) Heat transfer and pressure drop correlations for twisted-tape inserts in isothermal tubes: part II—transition and turbulent flows. J Heat Transf 115(4):890–896. doi:10.1115/1.2911384
McClusky HL, Holloway MV, Beasley DE, Conner ME (2002) Development of swirling flow in a rod bundle subchannel. J Fluids Eng 124(3):747–755. doi:10.1115/1.1478066
Rahimi M, Shabanian SR, Alsairafi AA (2009) Experimental and CFD studies on heat transfer and friction factor characteristics of a tube equipped with modified twisted tape inserts. Chem Eng Process 48(3):762–770. doi:10.1016/j.cep.2008.09.007
Saha SK, Dutta A, Dhal SK (2001) Friction and heat transfer characteristics of laminar swirl flow through a circular tube fitted with regularly spaced twisted-tape elements. Int J Heat Mass Transf 44(22):4211–4223. doi:10.1016/S0017-9310(01)00077-1
Shabanian SR, Rahimi M, Shahhosseini M, Alsairafi AA (2011) CFD and experimental studies on heat transfer enhancement in an air cooler equipped with different tube inserts. Int Commun Heat Mass Transf 38(3):383–390. doi:10.1016/j.icheatmasstransfer.2010.12.015
Takeda Y (1991) Development of an ultrasound velocity profile monitor. Nucl Eng Des 126(2):277–284. doi:10.1016/0029-5493(91)90117-Z
Takeda Y, Kikura H (2002) Flow mapping of the mercury flow. Exp Fluids 32(2):161–169. doi:10.1007/s003480100296
Thianpong C, Eiamsa-Ard P, Wongcharee K, Eiamsa-Ard S (2009) Compound heat transfer enhancement of a dimpled tube with a twisted tape swirl generator. Int Commun Heat Mass Transf 36(7):698–704. doi:10.1016/j.icheatmasstransfer.2009.03.026
Zhang X, Liu Z, Liu W (2012) Numerical studies on heat transfer and flow characteristics for laminar flow in a tube with multiple regularly spaced twisted tapes. Int J Therm Sci 58:157–167. doi:10.1016/j.ijthermalsci.2012.02.025
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Hamdani, A., Ihara, T. & Kikura, H. Experimental and numerical visualizations of swirling flow in a vertical pipe. J Vis 19, 369–382 (2016). https://doi.org/10.1007/s12650-015-0340-8
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DOI: https://doi.org/10.1007/s12650-015-0340-8