선박용 Ejector의 직관부와 디퓨저 길이 변화에 따른 성능비교 및 유동특성에 관한 연구
The evaluation of performance and flow characteristics due to the length of throat and diffuser for ship's ejector
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초록
이젝터는 고압의 주유동을 통해 저압의 부유동을 이동시키는 단순한 장치이다. 이젝터의 효율은주방향으로 작동하는 다른 이송 장치에 비해 매우 낮다. 그러나 구동장치가 없어 간단한 구조를 가지고있으며, 낮은 구동에너지로 많은 양의 유체를 이송시킬 수 있는 장점을 가지고 있다. 본 연구에서는 선박에서 많이 사용되고 있는 side-type 액체용 이젝터에 작동유체의 유량을 변화시키면서 정상, 비압축성유동에 대해 실험 및 CFD 분석을 통하여 직관부 및 디퓨저의 길이변화에 따른 이젝터의 유동 패턴과흡입 현상을 분석하였다.
Abstract
Ejector is a simple device which can transport a low-pressure secondary flow by using a high-pressureprimary flow. The efficiency of the ejector system is relatively very low, compared to other fluid transportdevices driven mainly by the forces acting on the normal direction. However, its major advantage is asimple structure with no moving parts, and it transports a large amount of fluid with a small driving energy. In this study, the performance of side-type liquid ejector commonly used in ships; is analyzed by using experimentaland CFD methods under steady and incompressible flow condition by varying the length of thethroat and diffuser, the flow pattern and suction phenomenon were studied in detail.
참고문헌 (10)
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