NTRS - NASA Technical Reports Server

Back to Results
Analysis of dynamic characteristics of fluid force induced by labyrinth sealFlow patterns of the labyrinth seal are experimentally investigated for making a mathematical model of labyrinth seal and to obtain the flow induced force of the seal. First, the flow patterns in the labyrinth chamber are studied on the circumferential flow using bubble and on the cross section of the seal chamber using aluminum powder as tracers. And next, the fluid force and its phase angle are obtained from the measured pressure distribution in the chamber and the fluid force coefficients are derived from the fluid force and the phase angle. Those are similar to the expression of oil film coefficients. As a result, it is found that the vortices exist in the labyrinth chambers and its center moves up and down periodically. The pressure drop is biggest in the first stage of chambers and next in the last stage of chambers.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Iwatsubo, T.
(Kobe Univ.)
Kawai, R.
(Kobe Univ.)
Kagawa, N.
(Kobe Univ.)
Kakiuchi, T.
(Kobe Univ.)
Takahara, K.
(Kobe Univ.)
Date Acquired
August 12, 2013
Publication Date
December 1, 1984
Publication Information
Publication: NASA. Lewis Research Center Rotordynamic Instability Problems in High-Performance Turbomachinery
Subject Category
Mechanical Engineering
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
No Preview Available