Multiphase Science and Technology A Quarterly

ISSN for PRINT: 0276-1459

For Online Access

Best Paper Award Selection - Editorial Board Site

2006, Volume18

Issue 4

111 pages

DOI: 10.1615/MultScienTechn.v18.i4

Issue price - $150.00

Mio Hirayama
Kansai University, Department of Mechanical Engineering, Yamate-cho 3-3-35, Suita, Osaka 564-8680, Japan

Hisashi Umekawa
Kansai University, Department of Mechanical Engineering, Yamate-cho 3-3-35, Suita, Osaka 564-8680, Japan

Mamoru Ozawa
Department of Mechanical Engineering, Kansai University, Yamate-cho 3-3-35, Suita, Osaka 564-8680, Japan

Recently, regional flow instability in two-phase flow system, i.e. flow fluctuations occurred only in the core region of nuclear reactor or multi-channel region without fluctuation of the total inlet flow, is attracting much interest. This flow instability is a significant problem for the systems from the viewpoint of safety and economy. Many investigations on the flow instabilities have been conducted so far, and respective stability criteria have been proposed, while these investigations focused normally on the one-channel system without flow maldistribution, and the resulting stability criteria are hardly applied to the regional flow instability problems.
Thus in the present investigation, we conducted analytical investigation focusing not only on the whole system flow instability but also on the regional flow instability. The stability analysis was performed with lumped-parameter model of parallel boiling channels. Finally the stability criteria for the two types of the flow instabilities and the stability maps were obtained.

DOI: 10.1615/MultScienTechn.v18.i4.10 Download article, 305-333 pages

Article price - $45.00

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