Effect of Electric Power-Supplies on Acoustic Emission Signal during Boiling Process
الكلمات المفتاحية:
Acoustic Emission، bubble activity، pool boilingالملخص
The dynamic bubble phenomena in two-phase, liquid/gas systems occur in many different hydraulic processes such as valves, centrifugal pumps, fluid piping transportation, boiling processes and nuclear reactors. Bubble activity phenomena cause some problems such as vibration, noise, decreased of equipment efficiency and surface pitting. Monitoring and detection of bubble activity at an early stage during the boiling process is very important to nuclear safety and many industrial processes. Acoustic emission (AE) technique in this work investigation covers the frequency between 100 kHz and 1000 kHz. Obtained results show a high feasibility of AE technology in detection and diagnosis of bubble dynamic at an early stage during pool boiling. It was observed that bubble activity is detectable with AE method, and there is a clear relationship between increasing AE signals with increase electric power-supply levels and the bubble formation during pool boiling..
المراجع
C. Y. Liang W , L. Zhang, Q. Xu, “Gas pipeline leakage detection based on acoustic technology,” Eng. Fail. Anal., vol. 31, 2013.
E. Christopher, Brennen, Cavitation and bubble dynamics. Oxford: Oxford University Press, 1995.
M. Jazi and H. Rahimzadeh, “Waveform analysis of cavitation in a globe valve,” Ultrasonics, vol. 49, no. 6–7, pp. 577–582, 2009.
C. Brennen, Hydrodynamics of Pumps, Oxford Uni. Cambridge University Press, 1994.
J. Yan, Y. Heng-hu, Y. Hong, Z. Feng, L. Zhen, W. Ping, and Y. Yan, “Nondestructive Detection of Valves Using Acoustic Emission Technique,” vol. 2015, 2015.
L. Alfayez, D. Mba, and G. Dyson, “Detection of incipient cavitation and the best efficiency point of a centrifugal pump using Acoustic Emission,” 2004.
T. G. Leighton, “The acoustic bubble: Oceanic bubble acoustics and ultrasonic cleaning,” Proc. Meet. Acoust., vol. 24, pp. 1–5, 2015.
M. Strasberg, “Gas Bubbles as Sources of Sound in Liquids,” J. Acoust. Soc. Am., vol. 28, no. 1, p. 20, 1956.
T. Alhashan, M. Elforjani, A. Addali, and J. Teixeira, “Monitoring of Bubble Formation during the Boiling Process Using Acoustic Emission Signals,” Int. J. Eng. Res. Sci., vol. 2, no. 4, pp. 66–72, 2016.
Carmi Rami , Bussiba Arie, A. I. and H. I. “Detection of Transient Zones During Water Boiling by Acoustic Emission,” Acoust. Emiss., vol. 29, pp. 89–97, 2011.
T. Alhashan and A. Addali, “The Effect of Salt Water on Bubble Formation during Pool Boiling Using Acoustic Emission Technique,” vol. 13, no. 5, pp. 51–56, 2016.
P. Benes and M. Uher, “Identification of liquid boiling by acoustic emission,” Fundam. Appl. Metrol., no. 1, pp. 1396–1401, 2009.
G. dyson Alfayez, L., D. Mba, Detection of incipient cavitation and the best efficiency point of 2.2MW centrifugal pump using acoustic emission, In 26th Eu. Berlin, 2004.
P. M. Neill, G.D., Reuben, R.L. and Sandford, “Detection of Incipient Cavitation in Pumps using Acoustic Emission.,” J. Process Mech. Eng., vol. 211, no. 4, pp. 267–277, 1997.
H. Jazi A. Masjedian, and Rahimzadeh, “Detecting cavitation in globe valves by two methods: Characteristic diagrams and acoustic analysis,” Appl. Acoust., vol. 70, no. 11– 12, pp. 1440–1445, 2009.
A. Addali, “Monitoring gas void fraction in two-phase flow with Acoustic Emission,” PHD Thesis. Cranfield University, 2010.
Husin Shuib and Mba Divad, “Acoustic emission of a single bubble activities,” in Proceedings of the World Congress on Engineering 2010 Vol. II, 2010, vol. II, no. 0, pp. 0–5.
J. K. Derakhshan JO, Houghton RR, “Cavitation monitoring of hydro turbines with RMS acoustic emission measurements,” Proc. world Meet. onacousticemission, vol. 15, p. p.305, 1989.
Y. a. Cengel, Heat Transfer: A Practical Approach, vol. Second EDI. 2003.
