直升机旋翼尾迹研究的进展

 通过对直升机旋翼尾迹分析方法现状的考查,提出相应于“自由尾迹”的“约束尾迹”概念,设想了在约束条件限制下进行尾迹分析的一类新方法——约束尾迹分析法。其基本点在于通过实验分析,建立可靠的尾迹约束条件,既可克服预定尾迹分析的局限性,又可克服自由尾迹分析过于理想化的缺点。其目的是减少计算量,提高计算结果的可靠性。

RECENT ADVANCEMENT IN HELICOPTER ROTOR WAKE STUDY

Based on a concise review of state-of-the-art of the methodology for analysing the wake flows behind helicopter rotors, a novel idea for the "constrained wake model" pertaining to the conventional free wake model is proposed. The constrained wake analysis is conceived in which the wake analysis is performed under the limitation of certain constraints imposed on the wake. The essence of the idea is to lay the free wake analysis on available physical understandings, aiming at a remarkable reduction of computational efforts and a significant improvement on the reliability of the predictions.