NDLI: Numerical Analysis of Influence of Pipe Length on Cavitation Surge

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Iga, Yuka Nishitanaka, Hayato Yoshiki, Yoshida
Copyright Year	2011
Abstract	Generally, in boundary condition of numerical simulation of internal flow, flow velocity is fixed in the inlet boundary and static pressure is fixed in the outlet boundary or the inverse condition, which is supposed that upstream and downstream pipes and the uniform flows inside the pipes extend infinitely from the boundaries. Therefore, a numerical simulation of influence of pipe length of fluid machinery cannot be realized by changing a boundary position of the computational region. In the present study, a boundary condition which is taking into account a pipe length is used to numerical simulation of unsteady cavitation in three-blade cyclic cascade, where generalized unsteady Bernoulli equation is adapted to one dimensional region from a upstream tank to the inlet boundary. In the study, cavitation surge frequencies reproduced in the present study are compared with empirical and theoretical characteristics of cavitation surge frequencies. Then, it shows good agreement with empirical frequency of cavitation surge although it does not take into account of the system such as pipe length. On the other hand, the theoretical frequency, which takes into account of the system, predicts a value which is less than half of the present numerical result.
Sponsorship	Fluids Engineering Division
Starting Page	351
Ending Page	357
Page Count	7
File Format	PDF
ISBN	9780791844403
DOI	10.1115/AJK2011-06066
Volume Number	ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D
Conference Proceedings	ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
Language	English
Publisher Date	2011-07-24
Publisher Place	Hamamatsu, Japan
Access Restriction	Subscribed
Subject Keyword	Computer simulation Blades Cascades (fluid dynamics) Cavitation Surges Flow (dynamics) Machinery Pressure Fluids Numerical analysis Internal flow Boundary-value problems Pipes
Content Type	Text
Resource Type	Article

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