相似伴流的模拟与船模-实船性能相似的实现

Simulation of Similar Wake and Realization of Similarity of Model-ship Performance

在常规自航试验结果的基础上,再将物理存在的标称伴流与虚拟的螺旋桨诱导速度相结合以修正尾流的速度亏损,使摩擦阻力与尾流速度亏损同时得到修正,用数值方法模拟出与实船相似的平均实效伴流场。桨模在相似伴流流场中运转,可得到真正的"实船自航点",给出模型-船实相似的"试验"结果,推进因子可直接用于实船,可按相似关系预报实船性能。

Based on the regular self-propulsion test results, combining the physical presence of the nominal wake with the virtual propeller induction speed to correct the wake loss rate, in order to correct the frictional resistance and the wake velocity loss simultaneously, the numerical simulation of the average effective flow field similar to the actual ship is done. The propeller is operated in similar wake and the real "self-propulsion point of ship" can be gained. The "test" results of the model-ship similarity are given. The propulsion factor can be directly applied to the actual ship, and the actual ship performance can be predicted by similarity.