The maximum entropy spectral analysis on void fraction fluctuation of helium liquid-vapour two-phase flow

✍ Scribed by J. Wang; Y.Y. Wu; L. Zhang; C.X. Li

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 301 KB
• Volume: 34
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(05)80078-5

✦ Synopsis

Study of the time-spatial fluctuation phenomenon of void fraction in helium liquid-vapour two-phase flow is very important for understanding the transition mechanism of flow patterns, specially, in superconducting-magnet cooling system. In this paper, the void fraction wave has been studied by focusing the attention in experiment with the TSA ( Time Series Analysis ) method that is a very useful data treatment method for stochastic process. The results have clearly shown that with increasement of void fraction in helium two-phase flow the characteristic frequency in Maximum Er~tropy Marple Spectrum is moving into low frequency domain, which distinguishing feature can be used to be a new criterion for diagnosing flow patterns.