The effect of the diameter on air-water annular and churn flow in vertical pipes with and without surfactants
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- 作者：A.T. van Nimwegena ; a.t.vannimwegen@tudelft.nl" class="auth_mail" title="E-mail the corresponding author ; L.M. Portela ; a ; l.portela@tudelft.nl" class="auth_mail" title="E-mail the corresponding author ; R.A.W.M. Henkesb ; c ; r.a.w.m.henkes@tudelft.nl" class="auth_mail" title="E-mail the corresponding author
- 关键词：Annular flow ; Churn flow ; Foam ; Liquid loading ; Pipe diameter
- 刊名：International Journal of Multiphase Flow
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：88
- 期：Complete
- 页码：179-190
- 全文大小：2405 K
文摘
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We studied air-water flow with and without surfactants in 34–80 mm ID vertical pipes.
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The flow behaviour around the annular-churn transition depends on the diameter.
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Surfactants reduce the pressure gradient at low gas flow rates.
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Surfactants are less effective as the thickness of the film at the wall increases.
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Film thickness increases for smaller pipe diameters and larger liquid flow rates.