[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5293/KFMA.2008.11.4.014

Flow Characteristics of Gaseous Leak flows in Narrow Cracks

Hong, Chung-Pyo (Dept. of Mech. Eng., Tokyo University of Science)

Publication Information

The KSFM Journal of Fluid Machinery / v.11, no.4, 2008 , pp. 14-21 More about this Journal

Abstract

The prediction for gaseous leak flows through a narrow crack is important for a leak-before-break (LBB) analysis. Therefore, the methodology to obtain the flow characteristics of gaseous leak flow in a narrow crack for the wide range by using the product of friction factor and Reynolds number correlations (fRe) for a micro-channel is developed and presented. The correlation applied here was proposed by the previous study. The fourth-order Runge-Kutta method was employed to integrate the nonlinear ordinary differential equation for the pressure and the regular-Falsi method was also employed to find the inlet Mach number. A narrow crack whose opening displacement ranges from 10 to $100{\mu}m$ with a crack length in the range from 2 to 200mm was chosen for sample prediction. The present results are compared with both numerical simulation results and available experimental measurements. The results are in excellent agreement with them. The leak flow rate can be approximately predicted by using proposed methodology.

Keywords

Leak flow rate; Friction factor; Narrow crack;

Citations & Related Records

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