2004
DOI: 10.1007/bf03181486
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Phenomenon of labyrinth seal with low static pressure difference and large clearance

Abstract: This paper discusses the straight-through type labyrinth seal. This labyrinth seal is used for axial flow fans, which have an outer ring at the blade tip to seal the clearance between the ring tip and the fan shroud, in order to prevent the reverse flow or leakage. These fans are used for the cooling of automobile radiators. In these cases, the labyrinth seal is used in an extremely low static pressure difference and a large clearance. A significant decrease of the leakage rate was reported even when the labyr… Show more

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Cited by 5 publications
(4 citation statements)
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“…20 Recently, the renormalization group (RNG) k-e turbulence model, which is suitable to solve the problems of flow accompanied by separating or circulating flow, has been employed to analyze the seal performance by many researches. [28][29][30] In this article, the RNG k-e turbulence model is used for calculating the flow characteristics inside the seal. The momentum equations, the continuity equation and the turbulence model equations are solved using the simple pressure-velocity coupling algorithm.…”
Section: Numerical Modelmentioning
confidence: 99%
“…20 Recently, the renormalization group (RNG) k-e turbulence model, which is suitable to solve the problems of flow accompanied by separating or circulating flow, has been employed to analyze the seal performance by many researches. [28][29][30] In this article, the RNG k-e turbulence model is used for calculating the flow characteristics inside the seal. The momentum equations, the continuity equation and the turbulence model equations are solved using the simple pressure-velocity coupling algorithm.…”
Section: Numerical Modelmentioning
confidence: 99%
“…However, it is unclear why the influence of rotation can cause such considerable reduction in the leakage rate. Therefore, the authors are going to conduct the visualization study using the computational fluid dynamics (CFD) in order to clarify the detailed internal flow on the rotating condition, as well as to solve the reason for the significant decrease in the leakage rate in the sequel (Shimada et al, 2004). However, most previous visualization studies have been conducted using the two-dimensional test rig with a smoke (Komotori, 1957) and with a schlieren system to use of a Freon doping technique (Tipton et al, 1986) and so forth, to neglect the effect of rotation.…”
Section: Effect Of Rotationmentioning
confidence: 99%
“…A labyrinth seal implies that a certain number of throttling gears exist between moving parts and stationary parts leading to the formation of several twists and turns between the tooth and wall of the chamber. Hence, throttling effect and energy effect occur when the mediators go through the seal teeth and the seal chamber, thereby reducing the amount of leakage [3]. It is characterized by a high-pressure ratio, simple structure, and high reliability [4].…”
Section: Introductionmentioning
confidence: 99%