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http://dx.doi.org/10.5762/KAIS.2019.20.12.125

A study on the behavior of the piston with orifice hole in the cylinder of a gas spring  

Jeong, Nam-Gyun (Division of Mechanical Engineering, Inha Technical College)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.20, no.12, 2019 , pp. 125-130 More about this Journal
Abstract
A gas-spring has been used in many areas and its use is increasing because it can be designed for a range of purposes. In this study, the behavior of a piston with an orifice hole inside the gas-spring cylinder was predicted using computational fluid dynamics (CFD). The piston was designed to reduce the reaction force if the gas-spring is compressed and to move at a low speed when it is returned. The analysis showed that if the initial gas pressure in the gas-spring is increased to a certain level, the speed of the piston would not decrease with time but will remain constant. The effects of orifice hall size on the piston return speed were investigated. Reducing the size of the orifice hole will increase the pressure difference on both sides of the piston, reduce the piston speed, and make it more constant. On the assumption of a constant speed of the piston, a theoretical solution to the return speed of the piston was derived according to the initial gas pressure, and the results for several initial gas pressures were compared with those of CFD. Comparison studies showed similar results for both methods.
Keywords
Gas-spring; Piston; Return Speed; Orifice Hole; Computational Fluid Dynamics;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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