摘要
本文采用带有κ-ε湍流模式的流线迭代法计算敞水螺旋桨和回转体后螺旋桨的性能,计算中采用涡轮机械中分析螺旋桨叶剖面出口流动方向和大小的方法,从速度和能量的角度来考虑螺旋桨对流体的作用,因此流体通过螺旋桨后能量的改变是预测螺旋桨性能的关键。它要求计算螺旋桨叶剖面的出流角,出流角由可测量的理想出流角和实际流体引起的偏差角组合而成。一待出流角确定后即可得到流体经过螺旋桨后能量的改变,利用流线迭代法可算出螺旋桨与回转体组合体周围的流场,随之可确定螺旋桨的各性能参数。本方法对B4-70-12和B3-50系列螺旋桨的敞水性能进行了计算,还对一个数学回转体的自航试验进行了数值模拟,其结果同试验吻合良好。 与已有的回转体后螺旋桨性能的预测方法比较,本方法的优点在于不需在回转体尾部流场和螺旋桨性能之间进行迭代计算,从而大大地减少了计算量。
A vlscous-solution method is set forth for analyzing the flow field and predicting the performance characteristics of the open propeller and of the propeller behind a body of revolution. The Streamline Iterative Method has been used to calculate the flow field with the turbulent equation of K-e model. The direct problem solution requires the calculation of the changes of velocity and energy through the propeller. It is treated by calculating the outlet flow angles (the measured blade outlet angles and deviation angles due to real fluid effects) for the propeller blade sections. The propeller performance parameters can then be calculated by simply considering momentum and energy In this paper, numerical results of performance characteristics of a B4-70-12 propeller and B3-50 series propellers are given and comparedwith experiment. Also, the detailed process of predictions of self-propulsion tests for a submerged body of revolutionpropeller is given. The numerical results show resonable agreement with experiments.
出处
《中国造船》
EI
CSCD
北大核心
1990年第3期9-17,共9页
Shipbuilding of China
