螺旋桨性能的自由尾涡分析法计算

PROPELLER PERFORMANCE PREDICTION WITH FREE WAKE ANALYSIS METHOD

采用自由尾涡分析方法，把螺旋桨的尾涡模型分为近涡区和远涡区两部分，计算了在不同进距比情况下的螺旋桨性能。在小进距比的重载情况，螺旋桨尾涡的收缩对螺旋桨的性能影响较大。根据升力线理论采用自由尾涡分析方法考虑尾涡收缩，改进了小进距比情况下的计算结果，使得在所有情况下螺旋桨性能的计算结果和实验结果符合很好。

The calculations of propeller performance at different advance ratios have been eompleted with the free wake analysis method.The wake is divided into near and far regions.In the case of heavy load when the advance ratio of propeller is small,the contraction of wake has large effect on the performance of the propeller.The free wake analysis method takes the wake contraction into account.According to lifting lines for the blade loading distribution,propeller performance calculated shows a good agreement with experimental data.