내침식페인트 성능 판별에 적합한 새로운 캐비테이션 침식시험기법 개발
Development of New Cavitation Erosion Test Method for Analyzing the Durability of Erosion Resistance Paint
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초록
The very erosive cavitation is simulated by an inclined propeller dynamometer in the medium-size cavitation tunnel of MOERI. The inclined shaft for propeller makes strong cavitaion, which occurs around the root of a propeller blade. The cavitation begins at the leading edge of the propeller and contracted toward the trailing edge through the re-entrant jet action. The cavity focused on the region near the trailing edge collapsed over the blade surface. As the impact pressure by the cavitation collapsing is too strong, it can damage the blade surface in the form of pit. This cavitation impacts created by the collapsing process are similar to the full-scale ones and are different from those by other erosion test methods. The newly developed cavitation erosion test method can be applied to evaluate the materials such as metals, ceramics and coatings in terms of cavitation resistance.
Abstract
The very erosive cavitation is simulated by an inclined propeller dynamometer in the medium-size cavitation tunnel of MOERI. The inclined shaft for propeller makes strong cavitaion, which occurs around the root of a propeller blade. The cavitation begins at the leading edge of the propeller and contracted toward the trailing edge through the re-entrant jet action. The cavity focused on the region near the trailing edge collapsed over the blade surface. As the impact pressure by the cavitation collapsing is too strong, it can damage the blade surface in the form of pit. This cavitation impacts created by the collapsing process are similar to the full-scale ones and are different from those by other erosion test methods. The newly developed cavitation erosion test method can be applied to evaluate the materials such as metals, ceramics and coatings in terms of cavitation resistance.
참고문헌 (6)
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- Kim, Y.H, "Study on Methods to Minimize Erosion Damages in the Ship Structure, Research Report", Ocean Industry Research Institute, Korea Maritime University, ~ (1999)
- 김윤해, "유체 환경하에서의 고분자 기지 복합재료와 금속재의 캐비테이션 침식 특성", 대한기계학회논문집 A, 27(3), pp.363~371 (2003), 대한기계학회
- Report of Cavitation Committee,Vol. 1 Sept, "19th ITTC", ~ (1990)