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Cutwaters Before Rams: an experimental investigation into the origins and development of the waterline ram
International Journal of Nautical Archaeology ( IF 0.6 ) Pub Date : 2016-12-19 , DOI: 10.1111/1095-9270.12209
William M. Murray 1 , Larrie D. Ferreiro 2 , John Vardalas 3 , Jeffrey G. Royal 4
Affiliation  

Students at Stevens Institute of Technology (Hoboken, NJ, USA) investigated the reasons for an elongated projection at the bow of Mediterranean galleys. Using a 1:20 base model adapted from the Trireme Trust's Olympias fitted with: 1) an elongated projection; and 2) a control bow similar to excavated merchant ships, tow-tank tests were carried out at various speeds. Hydrodynamic resistance and power were calculated for each bow type. Above speeds corresponding to 6 knots, the cutwater bow significantly attenuated the model's bow waves when compared to the control bow. These results were then compared to those of the ship with a ram-type bow from experiments conducted in 1985 at the National Technical University of Athens, which showed similar wave-attenuating characteristics.

中文翻译:

公羊之前的过水区:水线公羊的起源和发展的实验研究

史蒂文斯理工学院(美国新泽西州霍博肯)的学生研究了地中海厨房船首拉长投影的原因。使用从Trireme Trust的Olympias改编而成的1:20基本模型,该模型配有:1)细长的投影;2)类似于商船的控制船首,拖曳试验以不同的速度进行。计算每种船首类型的水动力阻力和功率。高于对应于6节的速度时,与对照船首相比,防洪船首显着减弱了模型的船首波。然后,将这些结果与1985年在雅典国立技术大学进行的实验中具有撞锤式船首的船舶的结果进行了比较,结果显示了相似的波衰减特性。
更新日期:2016-12-19
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