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an experimental study on the static and dynamic characteristics of pump annular seals with two phase flowA new test apparatus is reconstructed and is applied to investigate static and dynamic characteristics of annular seals leaked by two phase flow (gas and liquid) for turbopumps. The fluid forces acting on the seals are measured for various parameters such as void ratio, the preswirl velocity, the pressure difference between the inlet and outlet of the seal, the whirling amplitude, and the ratio of whirling speed to spinning speed of the rotor. Influence of these parameters on the static and dynamic characteristics is investigated from the experimental results. As a result, with regard to the two phase flow, as the void ratio increases, the flow induced force decreases. Another dynamic characteristic of two phase flow is as almost similar as that of the monophase flow.
Document ID
Document Type
Conference Paper
Iwatsubo, T.
(Kobe Univ.)
Nishino, T.
(Kobe Univ.)
Date Acquired
September 6, 2013
Publication Date
January 1, 1994
Publication Information
Publication: NASA. Lewis Research Center, Rotordynamic Instability Problems in High-Performance Turbomachinery, 1993
Subject Category
Distribution Limits
Work of the US Gov. Public Use Permitted.

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