Pressure Drop and Void Fraction of Two-Phase Flow (Air-Water) in Grooved Vertical Pipes

Supa Kusuma Aji, Nicky Suwandhy, Chandra Gunawan, Bayu Pranoto, Hangga Wicaksono

Abstract

In an industrial environment, Two-phase flows has many weaknesses, including pressure drop and void fraction. One strategy to reduce losses that arise is to use passive methods. The passive method used is to utilize the shape of the grooves in the channel. In this study, the flow is used to determine its effect on the pressure drop and void fraction that appears in two-phase flow. The experimental method was used for this study. The test pipe is equipped with 16 grooves, while the smooth pipe (without grooves) is used as a comparison. The test pipe is made of acrylic material. The water fluid is circulated using a centrifugal water pump with a superficial speed of 0.33-0.42 m/s. Air fluid is supplied using a compressor with superficial speeds of 0.049, 0.066, and 0.082 m/s. Measurement of pressure drop was carried out using a pressure transmitter with an Arduino data logger. The void fraction is calculated by determining the ratio of the volume fraction of water and air in the test tube. The results of the study revealed that the use of 16 grooves in the pipe can reduce the pressure drop and cavity fraction that appears when compared to smooth pipes.

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References

1. A. Awaluddin, S. Wahyudi, and A. S. Widodo, “Analisis Aliran Fluida Dua Fase (Udara-Air) melalui Belokan 45°,” Jurnal Rekayasa Mesin, vol. 5, no. 3, pp. 217-224, 2014. (in Indonesian).

2. C. E. Brennen, Fundamentals of multiphase flow, Cambridge: Cambridge University Press, 2005.

3. Y. Z. Law and R. K. Jaiman, “Passive control of vortex-induced vibration by spanwise grooves,” J. Fluids Struct., vol. 83, pp. 1-26, 2018.

4. S. Martin and B. Bhushan, “Fluid flow analysis of continuous and segmented riblet structures,” Rsc Adv., vol. 6, no. 13, pp. 10962-10978, 2016.

5. N. O. Tanase, I. R. Damian, D. Broboana, and C. Balan, “The influence of grooved surface and liquid properties on vortices formation in vicinity of immersed cylinders,” Energy Procedia, vol. 85, pp. 521-529, 2016.

6. Y. Wang, Effects of Grooves on Drag in Laminar Channel Flow. London: University of Western Ontario, 2018.

7. P. W. Sunu, I. N. G. Wardana, A. A. Sonief, and N. Hamidi, “Flow behavior and friction factor in internally grooved pipe wall,” Adv. Stud. Theor. Phys., vol. 8, no. 14, pp. 643-647, 2014.

8. T. H. Kim, V. S. Chalgeri, W. Yoon, B. J. Yun, and J. H. Jeong, “Visual observations of flow patterns in downward air-water two-phase flows in a vertical narrow rectangular channel,” Ann. Nucl. Energy, vol. 114, pp. 384-394, 2018.

9. Y. Wang, A study of two-phase flow regime and pressure drop in vertical pipe. Grand Forks: University of North Dakota, 2018.

10. L. C. Ruspini, C. P. Marcel, and A. Clausse, “Two-phase flow instabilities: A review,” Int. J. Heat Mass Transf., vol. 71, pp. 521-548, 2014.

11. S. Sukamta, A. R. Ilham, and S. Sudarja, “The Investigation of Void Fraction of Two-Phase Flow Air-Water And Glycerine (0-30%) in The Capillary Pipe with Slope of 50 to Horizontal Position,” Media Mesin Majalah Teknik Mesin, vol. 20, no. 1, pp. 8-17, 2019.

12. Y. Xue, H. Li, C. Hao, and C. Yao, “Investigation on the void fraction of gas–liquid two-phase flows in vertically-downward pipes,” Int. Commun. Heat Mass Transf., vol. 77, pp. 1-8, 2016.

13. C. C. Tang, S. Tiwari, and A. J. Ghajar, “Effect of void fraction on pressure drop in upward vertical two-phase gas-liquid pipe flow,” J. Eng. gas turbines power, vol. 135, no. 2, article no. 022901, 2013.

14. J. Thome, Two–phase pressure drops - Engineering Data Book III, Alabama: Wolverine Tube Inc., 2007.

15. M. Pietrzak and M. Płaczek, “Void fraction predictive methods in two-phase flow across a small diameter channel,” Int. J. Multiph. Flow, vol. 121, article no. 103115, 2019.

16. J. R. Thome, “Void Fractions in Two-Phase Flows,” in Engineering Data Book III, Wolverine Tube, 2006.

17. M. Kawaji, Fundamental Equations for Two-Phase Flow Tubes - Handbook of Thermal Science and Engineering, Berlin: Springer International Publishing, 2018.

18. S. K. Aji, D. Widhiyanuriyawan, and L. Yuliati, “Pressure Drop dan Pola Aliran Dua Fase (Air-Udara) Melewati Pipa Groove Vertikal,” Jurnal Rekayasa Mesin, vol. 11, no. 3, pp. 357-365, 2020. (in Indonesian).

19. J. Jia, A. Babatunde, and M. Wang, “Void fraction measurement of gas–liquid two-phase flow from differential pressure,” Flow Meas. Instrum., vol. 41, pp. 75-80, 2015.

DOI: https://doi.org/10.20961/mekanika.v22i2.76968

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