摘要
基于叶素动量理论的对转涵道风扇桨叶设计方法虽然设计速度快,但设计精度不高。为提高设计方法的设计精度,同时保留设计的快速性,通过CFD计算对基于叶素动量理论的桨叶快速设计方法进行修正,提出一种耦合CFD修正的对转涵道风扇桨叶高效设计方法。通过CFD计算与修正设计的不断迭代,可使设计结果收敛至CFD计算结果,得到满足设计要求的桨叶。结果表明:MRF方法对对转涵风扇性能的求解精度不足,需采用非定常CFD方法。而通过CFD计算结果修正桨叶的拉力占比、入流角及叶素气动力后,对转涵道风扇总拉力设计精度提高10.4%,扭矩设计精度提高18.2%。文中提出的高效设计方法只需进行少量的CFD计算修正便能较好地满足设计要求,进行加速处理后,设计效率进一步提高25%。
The design method for the blades of a counter-rotating ducted fan based on blade element momentum theory has a fast design speed, but the design accuracy is not high. In order to improve the design accuracy and maintain the design speed, the fast design method based on blade element momentum theory was modified by CFD to propose an efficient design method for the blades of the counter-rotating ducted fan coupled with CFD modification. Through continuous iteration of the CFD calculation and modified design, the design results were converged to the CFD results,and the blades meeting the design requirements were obtained. The results showed that the MRF method was not accurate enough to solve the performance of the counter-rotating ducted fan,and the unsteady CFD method should be used. After modifying the blade thrust ratio,the inflow angle and blade aerodynamic forces through the CFD results, the design accuracy of the total thrust was improved by 10. 4%,and the design accuracy of the torque was improved by18. 2%. The efficient design method used can better meet the design requirements with a small amount of CFD modifications. In addition, the design efficiency was further improved by 25%through the accelerated processing.
作者
郭佳豪
周洲
李旭
GUO Jiahao;ZHOU Zhou;LI Xu(School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2022年第9期1835-1845,共11页
Journal of Aerospace Power
基金
民机专项(MJ-2015-F-009)
陕西省自然科学基金(2019JM-044)
陕西省重点研发项目(2021ZDLGY09-08)。
关键词
涵道风扇
对转
桨叶设计
叶素动量理论
修正设计
ducted fan
counter-rotating
blade design
blade element momentum theory
modified design
