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Open AccessArticle

An Experimental Study of the Leakage Mechanism in Static Seals

College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410072, China
National Innovation Institute of Defense Technology, Chinese Academy of Military Science, Beijing 100000, China
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(8), 1404;
Received: 18 July 2018 / Revised: 16 August 2018 / Accepted: 16 August 2018 / Published: 19 August 2018
This paper investigates the fluidic leak rate through sealing contact surfaces by comparison between model calculation and experiment measurement. The focus is on an experimental device designed to measure the leak rate of the static seals with a simpler structure, smaller errors, stronger stability, and more functions. Using the device, experiments were carried out to four test pieces with different surface characteristics, whose leak rates were measured separately. Compared with the calculation results obtained from the fractal surface leak rate prediction model, the correctness and the application range of the model were verified, and the effects of different surface topographies and material properties of the four test pieces on the leak rate were analyzed as well. The experimental device was also used to perform single-factor comparison experiments, which were then combined with the theoretical prediction model to analyze the effects of the sealing surface contact load, fluid pressure, and surface apparent size on the leak rate, so that theoretical support and experimental evidence for selecting the parameters of sealing device was provided. View Full-Text
Keywords: seal; fractal model; leak rate; experiments seal; fractal model; leak rate; experiments
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Zhang, Q.; Chen, X.; Huang, Y.; Zhang, X. An Experimental Study of the Leakage Mechanism in Static Seals. Appl. Sci. 2018, 8, 1404.

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