Application of quadrature method of moments to the polydispersed droplet spectrum in transonic steam flows with primary and secondary nucleation

A.G. Gerber; A. Mousavi

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Application of quadrature method of moments to the polydispersed droplet spectrum in transonic steam flows with primary and secondary nucleation

机译：矩矩法在具有一次和二次成核作用的跨音速蒸汽流中的多分散液滴谱中的应用

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This paper investigates the effectiveness of the Quadrature Method of Moments (QMOM) in representing droplet size distributions present in low-pressure steam turbine stages. In particular, distributions that result during transonic flow with sufficient supercooling and high expansion rate for primary and secondary nucleation to occur along the flow path. It is shown that the discretization of the droplet size distribution inherent in QMOM is robust for representing a polydispersed distribution with sizes several orders of magnitude apart, and originating from separate condensation phenomena. Inclusion of the QMOM method would thus provide a significant improvement in condensation models currently in use, which generally rely on a monodispersed representation of the droplet distribution.

机译：本文研究了矩矩法（QMOM）在表示低压蒸汽轮机级中存在的液滴尺寸分布方面的有效性。特别地，在跨音速流动期间产生的分布具有足够的过冷度和高的膨胀率，以沿流动路径发生一次和二次成核。结果表明，QMOM中固有的液滴尺寸分布的离散化对于表示大小分别为几个数量级的多分散分布是有鲁棒性的，并且是由单独的冷凝现象引起的。因此，包括QMOM方法将大大改善当前使用的冷凝模型，该模型通常依赖于液滴分布的单分散表示。

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来源
《Applied Mathematical Modelling》 |2007年第8期|p.1518-1533|共16页
作者
A.G. Gerber; A. Mousavi;
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作者单位

Department of Mechanical Engineering, University of New Brunswick Fredericton, NB, Canada E3B-5A3;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类应用数学;
关键词
nucleation; size distribution; polydispersed; steam turbine; method of moments;

机译：成核;尺寸分布;多分散;汽轮机;矩量法;

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Application of quadrature method of moments to the polydispersed droplet spectrum in transonic steam flows with primary and secondary nucleation

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