Abstract
The hydraulic fuse, which responds to the suddenly increased flow on rupture of a line and shuts off the fluid flow, would prevent large spillage of liquid. The quick-acting hydraulic fuse, which is mainly composed of a poppet, a seat, and a spring, must be designed to minimize the leaked flow and to prevent high collision speed between the poppet and seat during fuse operation on a line rupture. The optimal design parameters of a quick-acting hydraulic fuse were searched using the genetic algorithm and the complex method that are kinds of constrained direct search methods. The dynamic behavior of a quick-acting hydraulic fuse was researched using computer simulations that applied the obtained optimal design parameters. * Corresponding author: srlee@konyang.ac.kr Department of Mechanical Engineering, Konyang University, Nonsan 320-711, Korea Copyright C 2014, KSFC This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License(http:// creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. 기호 설명 : orifice area 1 : orifice area 3 : left side cross-sectional area of poppet : right side cross-sectional area of poppet : sum of and projected area of : sum of and projected area of : viscous damping coefficient resulting from fluid viscosity : discharge coefficient of orifice : clearance between middle bore of fuse case and poppet left end edge : clearance between outlet bore of fuse case and poppet right end edge : object function : force on poppet due to pressure differentials : flow force on the poppet : bias force on spring : gravitational acceleration : spring constant : length of poppet cone : length of poppet cylinder : mass of poppet : pressure in control volume 1 : pressure in control volume 2 : pressure in control volume 3 : flow rate through orifice 1 : flow rate through orifice 3 : flow rate into fuse entrance : internal radius of fuse case at initial position of poppet left end : radius of bore at middle of fuse case : radius of bore at outlet of fuse case
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