원유운반선 프로펠러의 모형 및 실선 축척 반류에서의 공동현상과 실선에서 관측된 공동현상의 비교
Comparison of Cavitation Patterns between Model Scale Observations using Model and Full-Scale Wakes and Full Scale Observations for a Propeller of Crude Oil Carrier
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In this paper, cavitation patterns of model tests were compared with those of full-scale measurement for a propeller of crude oil carrier which was suffered from erosions on suction side of blade tip region. Cavitation tests were performed at design and ballast draft using model and full scale nominal wakes. A model ship and wire mesh method was used for the simulation of wake patterns of model nominal wakes. For the prediction of full-scale wake patterns, a RANS solver(Fluent 6.3) was used and wire mesh method was used for the simulation of the full scale wakes. Comparison results show that cavitation patterns using predicted full-scale wake patterns are closer to cavitation patterns of full-scale measurement at ballast draft condition. Also, cloud cavitations were observed on the position of eroded area at both full-scale measurement and cavitation tests using simulated full-scale wake patterns.
Abstract
In this paper, cavitation patterns of model tests were compared with those of full-scale measurement for a propeller of crude oil carrier which was suffered from erosions on suction side of blade tip region. Cavitation tests were performed at design and ballast draft using model and full scale nominal wakes. A model ship and wire mesh method was used for the simulation of wake patterns of model nominal wakes. For the prediction of full-scale wake patterns, a RANS solver(Fluent 6.3) was used and wire mesh method was used for the simulation of the full scale wakes. Comparison results show that cavitation patterns using predicted full-scale wake patterns are closer to cavitation patterns of full-scale measurement at ballast draft condition. Also, cloud cavitations were observed on the position of eroded area at both full-scale measurement and cavitation tests using simulated full-scale wake patterns.
참고문헌 (13)
- Arndt, R, "Cavitation in Vortical Flows", Annual Review of Fluid Mechanics, 34, pp.143~175 (2002)
- Boorsma, A, "Quantification of Cavitation Impacts with Acoustic Emissions Techniques", Proceedings of the 7th International Symposium on Cavitation (2009)
- 최길환, "부분 프로펠러 날개 모형을 이용한 높은 레이놀즈 수에서의 공동시험", 대한조선학회 논문집, 46(6), pp.569~577 (2009), 대한조선학회
- Choi, J.E, "Study on the Scale Effects on the Flow Characteristics around a Full Slow-Speed Ship", Proceedings of the 8th Numerical Ship Hydrodynamics, pp.95~103 (2003)
- Eca, I, "Numerical Prediction of Scale Effect in Ship Stern Flows with Eddy-Viscosity Turbulence Models", Proc. of the 23rd symposium on Naval Hydrodynamics, pp.553~568 (2000)
- ITTC, "The Specialist Committee on Cavitation Erosion on Propellers and Appendages on High Powered", High Speed Ships, 2005, pp.통권 : 2, 509~542
- Junglewitz, A, "Cavitation Erosion – Damages and Countermeasures from a Classification Service Providers Point of View. STG Sprechtag Cavitation", ~ (2003)
- Jung, J.K, "Effect of Leading Edge Roughness on Cavitation Pattern and Fluctuating Pressure Amplitudes", Proceedings of the Annual Spring Meeting, pp.523~528 (2004)
- Kim, K.S, "Effect of Reynolds Number, Leading Edge Roughness and Air Content on the Cavitation Performance of Model Propellers", Journal of SNAK, 37(1), pp.10~25 (2000)
- Cavitation Inception on Ship Propeller Models. Report of Netherlands Ship Model Basin, "Kuiper, G", ~, pp.Publ. No. 655 (1981)
- Sasajima, H, "On the Estimation of Wake of Ships", Proc. of the 11th ITTC, pp.122~127 (1966)
- Ahn, J.W, "Influence of the Leading Edge Shape of a 2-Dimensional Hydrofoil on Cavitation Characteristics", Journal of SNAK, 37(1), pp.60~66 (2000)
- Yamaguchi, H, "Cloud Cavitation on Foil Sections", International Symposium on Cavitation CAV2006 (2006)