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Obtaining mathematical functions of the propeller thrust and torque coefficients fluctuations at non-uniform wake flow including geometry effects

机译:获得螺旋桨推力和扭矩系数的数学函数在包括几何效应的非均匀唤醒流动下的波动

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The main purpose of this paper is to obtain mathematical functions of the propeller thrust and torque coefficients fluctuations at non-uniform flow. Two types of inflow wakes from Seiun-Maru ship and INSEAN 7000 DWT Tanker are investigated for the B-series propeller. The computed results include the thrust and torque coefficients fluctuations and their mathematical functions under the influence of two different wakes for one blade and all blades of the studied propellers. To this accomplishment, variation of thrusts and torques coefficients under different pitch ratio, expanded area ratio and number of blades are investigated using classical mathematical methods in one cycle and the Fourier coefficients with ten terms are presented for each case. The results of thrust and torque coefficients at different propeller geometries are presented and discussed.
机译:本文的主要目的是获得螺旋桨推力和扭矩系数在不均匀流动波动的数学函数。 SEIUN-MARU SHIP和INERAN 7000 DWT油轮的两种流入为B系列螺旋桨调查。 计算结果包括推力和扭矩系数波动和它们的数学函数在两个不同唤醒的两种不同唤醒的影响下,以及所研究的螺旋桨的所有刀片。 为了实现这种成就,使用一个周期中的经典数学方法研究不同间距比,扩展面积比和叶片的不同间距比,扩展面积比和叶片的数量的变化,并且为每种情况呈现10个术语的傅里叶系数。 提出和讨论了不同螺旋桨几何形状的推力和扭矩系数的结果。

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