Moonpool과 Azimuth Thruster를 장치한 Drillship의 저항추진성능
Performance of Drillship with Moonpool and Azimuth Thrusters
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Abstract
The performance of a deep water drillship, is investigated with the view of the characteristics of the thrusters and the resistance increasement due to moonpool. The model tests have been performed to obtain the resistance of two drillships with the moonpool open and closed including shape changes of moonpool step. To design the DP system, thrust forces of azimuth thrusters have been measured during azimuthing at zero speed condition. Thrusters, azimuthing under the bottom of ship, have the interactions of the other thrusters due to flow changes made by other thrusters, and the existence of ship hull makes the thrust deduction higher than when the thrust operates by itself. The resistance increasement due to the moonpool is highly dependent on the step height of the moonpool and the draft. It is found that the height of moonpool step can reduce the resistance increasement by moonpool.
참고문헌 (6)
- "원형문풀 내부의 유동해석", pp.63~66 (2002)
- "드릴쉽에 대한 DP시스템 개발과 실험", pp.436~439 (1999)
- "드릴쉽에 대한 DPS 모형시험 기법개발", 38(2), pp.33~44 (2001)
- "Development of Dynamic Positioning Simulation Program", 231, pp.65~73 (1999)
- "Model Tests for a Deep Water Drillship" (1997)
- "Model Tests for 98,000㎥ Displacement Deepwater Drillship" (1998)