Numerical Analysis of Rudder Effects upon Ducted Propeller Units
Numerical Analysis of Rudder Effects upon Ducted Propeller Units
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发表时间：
2011
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通讯作者：
A. Caldas;M. Meis;A. Sarasquete
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作者：
A. Caldas;M. Meis;A. Sarasquete
这是一个众所周知的事实，使用导管螺旋桨是一个很好的选择，为那些需要在低速高推力值的应用。由于其特殊的工作条件，这适用于拖网渔船的情况，其拖网捕鱼时的速度在3至5节之间。除此之外，转向元素对两个方面的影响特别有趣；对推进因素的影响，以及机动性。本文研究了不同构型和形状的舵对推进系数和机动性的影响。有几个选择；喷嘴螺旋桨舵、三舵布置、一舵布置、流量调整舵等。计算分两个阶段进行；在第一种方法中，对导管螺旋桨-舵/舵这一完整系统在均匀流场中进行了计算；第二种方法采用典型拖网渔船尾流场。在这两个阶段，分别研究了舵对各系统能量效率和机动性能的影响。所有的计算都是使用商用CFD代码STAR-CCM+进行的。
It is a well known fact that the use of ducted propellers is a good option for those applications that need high thrust values at low speed. Because of its particular working conditions, this applies to the case of trawlers, whose velocities when trawling are between 3 and 5 kts. Beyond this, the effect that steering elements have on two aspects it is of particular interest; the effect upon propulsive factors, and the manoeuvrability capability. In the present paper, a study of the effects upon propulsive factors and the manoeuvrability by different rudder configurations and shapes has been carried out. There are several options; nozzle-propeller rudder, three rudder arrangements, one rudder arrangements, flow adapted rudders, etc. The calculations have been carried out in two different phases; in the first one, the calculations were carried out in a uniform flow field for the complete system, ducted propeller- rudder/rudders; for the second one, a typical trawler wake field was employed. For both phases, the effect of the rudder on the energy efficiency and also the manoeuvrability capabilities of each system were studied. All the calculations have been carried out using commercial CFD code STAR-CCM+.