バルブ付肥大船型の推進性能に関する研究 : 2軸船の主要寸法比が推進性能におよぼす影響

概要

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This report deals with researches concerning the effect upon the propulsive performance of variation in ship's proportions-L/B, B/d, C_B and l_<CB>-for extremely full forms with twin screws. The main results obtained from the test are as follows: 1. At the full load condition, residuary resistance coefficient γ_R increases with the decrease of L/B value and with the increase of C_B value. While, at the ballast condition, the variation of fit due to L/B values differs depending on C_B values. 2. Form factor K increases with the increase of C_B. 3. In self-propulsion factors, wake fraction W_T generally increases with the increase of C_B values, but the others vary scarcely owing to the change of L/B and C_B. 4. γ_R increases with the increase of B/d values at the full load condition, but decreases at the ballast condition. 5. The variation of l_<CB> effects upon γ_R values, espedally in the higher speed range. The model with l_<CB> most forward has extraordinary high values of γ_R.
独立行政法人海上技術安全研究所の論文
1974-03-30