Stability Criteria of The Steady Flow of A Liquid Containing Bubbles Alone A Nozzle  

Oleh:

Crespo, A. ; Garcia, J. ; Jimenez-Fernandez, J.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Fluids Engineering vol. 123 no. 4 (2001), page 836-840.
Topik: nozzle dan difuser; stability criteria; steady flow; liquid; bubbles; nozzle

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.4 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

The steady cavitating flow through a converging - diverging nozzle is considered. A continuum model is assumed with the Rayleigh - Plesset equation to account for the bubble dynamics. A similar problem has been studied previously by Wang and Brennen, and they found that if the upstream gas volume fraction of the bubbles exceeds a critical value there is flashing flow instability. In the present work, a perturbation analysis is made introducing a small parameter, , that is the ratio of the initial bubble diameter to the length scale of the nozzle. As a result of this analysis, the critical value of the upstream void fraction is calculated as a function of the several parameters appearing in the problem, and turns out to be very small and proportional to 3. A correlation is proposed giving explicitly the functional dependence of this critical value.

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