Abstract
Flow boiling has been receiving lots of attention and researches because it is commonly encountered in nuclear reactors and stream generators. Experimental studies on heat transfer in a circular tube with constant wall heat flux were carried out in laminar flow regime. The experiments were under steady and pulsating conditions and performed over a range of <500 Re <2000 and under atmospheric pressure. The wall temperature near inlet (T w1 ) was investigated. The experiment results show that in a pulsation period, the wall temperature fluctuates periodically and has a sharp drop when the inlet pressure fluctuates intensely. The rise time of T w1 accounts for 80–85% of one pulsation period. The experiment results demonstrate that the pulsating period and amplitude have a strong influence on this phenomenon. The pulsating period and amplitude influence the shape of the wall temperature curve. Only when the fluid in the wave trough starts boiling, the phenomenon of sharp drop of wall temperature occurs, and a small wave trough appears in the rising of the wall temperature if the boiling time is long. Furthermore, the flow regime transition induced by buoyancy or the intense fluctuation of inlet pressure could be the reasons for a sharp drop of wall temperature.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Bergles, A.E. Heat transfer enhancement—The encouragement and accommodation of high heat fluxes. Journal of Heat Transfer, 1997. 119(1): p. 8–19.
Bergles, A.E. Heat transfer enhancement—The maturing of second-generation heat transfer technology. Heat Transfer Engineering, 1997. 18(1): p. 47–55.
R.CM.Martineli, L.M.B. S.Takahi, Heat transfer to a Fluid Flowing Periodically at low Frequencies in a Vertical Tube. SAME, 1943. Vol.65: p. P789–798.
R. Lemlich, Vibration and Pulsation Boost Heat Transfer. Scheming. May 15,1961: p. 171–176.
B. Darling, G. Heat Transfer to liquids in intermittent flow. Petroleum, May 1959: p. 177–180.
Dou, H.S. Energy Gradient Theory of Hydrodynamic Instability. Of National University Of Singapore, 2005.
Dou, H.S. Mechanism of flow instability and transition to turbulence. International Journal of Non-Linear Mechanics, 2006. 41(4): p. 512–517.
Dou, H.-S, B.C. Khoo, and H.M. Tsai, Determining the critical condition for turbulent transition in a full-developed annulus flow. Journal of Petroleum Science and Engineering, 2010. 73(1): p. 41–47.
袁红胜, et al. 矩形通道内加减速条件下流态转捩特性研究. 核动力工程, 2014(06): p. 162–166.
Ohmi, M, M. Iguchi, and I. Urahata, Transition to Turbulence in a Pulsatile Pipe Flow Part 1, Wave Forms and Distribution of Pulsatile Velocities near Transition Region. Bulletin of Jsme, 1982. 25(200): p. 182–189.
Rouai, N.M. Influences of buoyancy and imposed flow transients on turbulent convective heat transfer in a tube. University of Manchester, 1987.
Fewster, J. Mixed forced and free convective heat transfer to supercritical pressure fluids flowing in vertical pipes. 1976, The University of Manchester.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2017 Springer Science+Business Media Singapore
About this paper
Cite this paper
Liu, X., Tan, S., Yuan, H., Feng, L. (2017). Wall Temperature Fluctuation Under Flow Pulsation in a Vertical Tube. In: Jiang, H. (eds) Proceedings of The 20th Pacific Basin Nuclear Conference. PBNC 2016. Springer, Singapore. https://doi.org/10.1007/978-981-10-2314-9_69
Download citation
DOI: https://doi.org/10.1007/978-981-10-2314-9_69
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-10-2313-2
Online ISBN: 978-981-10-2314-9
eBook Packages: EnergyEnergy (R0)