Abstract
Key Words: Velocity-Control Trim(속도 제어형 트림), Similarity(상사성), Pressure Drop(압력 강하),Cavitation(공동현상)초록: 속도제어형트림을구성하는기본유로요소로서90 의굴곡을갖는유로를선택하여폭과길이가상사성을가지도록설정하고0, 4, 8 회의굴곡을갖는총48개의단위유로요소에대해유동해석을수행하였다. 먼저, 동일요소에대한실험과수치해석결과를비교하여수치해석접근방법의타당성을검증하였다. 일정한차압에대해굴곡횟수에따른유량을계산한결과, 굴곡이없으면유로의길이가증가함에따라유량이감소하였다. 굴곡이있는경우, 유로가길어지면유량이증가하다가감소하였다. 케비테이션의억제의관점에서압력장을분석하였고, 이로부터동일한굴곡횟수를가질경우유로가길수록유로를따라발생하는압력강하특성이우수함을알았다. 또한, 유로의길이가같은경우에는굴곡횟수가많을수록압력이완만히감소하는특성을가짐을알수있었다.Abstract: We investigate the flow characteristics of elementary-flow paths with 90° bends; a velocity-control trimconsists of such paths. For geometric similarity, the width and length of each path are selected, and the number ofbends is 0, 4, or 8. The flow tests are conducted with the same flow-path elements. The numerical results are in goodagreement with the experimental data. In elements without bends, the volume flow rate decreases with the length of theflow path, with a constant pressure drop between the inlet and the outlet. However, in flow paths with 90° bends, itincreases and then decreases with the length of the flow path. For a fixed number of 90° bends, better pressure-dropcharacteristics are observed as the length of the flow path increases. For a fixed flow-path length, a flow-path elementwith more bends has a smoother pressure drop along the path.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Transactions of the Korean Society of Mechanical Engineers B
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
