AN IMPROVEMENT ON THE 1978 ITTC PERFORMANCE PREDICTION METHOD AND THE ARBITRARY LOADING METHOD OF PROPULSION MODEL TEST
AN IMPROVEMENT ON THE 1978 ITTC PERFORMANCE PREDICTION METHOD AND THE ARBITRARY LOADING METHOD OF PROPULSION MODEL TEST
复制标题
1978年ITTC性能预测方法及推进模型试验任意加载方法的改进
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
J.
中科院分区：
文献类型：
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作者：
Cen;C. Lin;J.
基于弗劳德比较定律的所谓“船舶自航点”推进试验中船模周围的流动条件与船舶周围的流动条件并不对应。因此，仅考虑摩擦阻力影响的常规缩放 w 和 t 的方法效果较弱。开发了一种估计 w 和 t 尺度效应的新方法，该方法可以同时考虑摩擦阻力和螺旋桨载荷的影响。在此基础上，可以改进1978年ITTC性能预测方法，只要船舶和模型自航点的弗劳德数相同，就可以在任意一个载荷下进行推进模型。结果表明，改进方法的部分参数优于1978年ITTC，推进试验的任意加载方法是可行的。
The flow conditions around ship models in propulsion tests at so-called "ship self-propulsion point" based on Froude's comparison law do not correspond to those around ships. So the routine methods for scaling w and t, in which only the effect of friction resistance can be considered are weak. A new method for estimating scale effects of w and t has been developed which can take both effects of friction resistance and propeller loading into account. Based on it, the 1978 ITTC performance prediction method can be improved and the propulsion model can be carried out at any one loading between loadings of ship's and model's self-propulsion point as long as their Froude's numbers are the same. The results indicate that the improved method is superior to the 1978 ITTC for some parameters and that the arbitrary loading method of propulsion test is practicable.