Feasibility analysis of WDPR support cone model application in hypersonic wind tunnel
- 航空航天－已发表论文 
绳牵引并联机构(WDPR)能够有效调整飞行器模型的位姿,为扩展风洞试验能力提供了一种新型支撑手段,具有很大的应用潜力。本文将对其在高超声速风洞中; 应用所涉及的稳定性与气动干扰问题进行研究。以10°尖锥标椎模型为例,设计了8绳牵引的并联支撑系统,可以通过调整绳长控制模型的位置和姿态。模拟了气; 动载荷作用下支撑系统的稳定性,优化牵引绳直径。基于构建的三维模型,借助CFD软件进行气动计算,包括马赫数为7.8时,不同迎角下绳牵引并联支撑锥体; 模型的气动力系数,通过与无绳支撑结果以及文献试验数据进行比较,表明在小迎角情况下,绳系支撑引起的气动干扰相对误差较小,但会随迎角的增大而增加。此; 外,分别对弯刀支撑和绳牵引并联支撑进行了模态分析,对比了2种支撑的固有频率。结果显示绳系支撑固有频率较高,系统刚度较大。本文的理论研究成果可为绳; 牵引并联支撑技术在高超声速风洞中的应用提供一定的技术支持。Wire-driven parallel robot (WDPR) provides a new support method for wind; tunnel tests due to its effective simulation of the aircraft model's; pose, and has a great application potential. This paper gives details of; an investigation of stability and aerodynamic interference referring to; the application of WDPR in hypersonic wind tunnel. The parallel support; system with 8 wires was constructed, and the 10° cone model was selected; as the test model whose position and pose can be adjusted through the; wire length. The support system's stability under the action of; aerodynamic force is simulated, and the wire diameter is optimized.; Based on the constructed three-dimensional model, under the condition of; Mach numuber is 7.8, the aerodynamic coefficient of the model suspended; with WDPR at different angles of attack is calculated in CFD. The; comparison of the simulation result with the result of the same model; without wires and the experimental data in reference indicates that, at; small angle of attack, the relative error of the aerodynamic; interference caused by the wires is small, and the interference; increases with the increase of angle of attack. In addition, modal; characteristics of the WDPR and the crescent shape support system are; analyzed and the natural frequencies of the two support systems are; compared. The comparison result shows that the natural frequency and the; stiffness of the WDPR are higher than those of the crescent shape; support system. The academic research work of this paper provides; reference to the application of wire-driven parallel support technology; in hypersonic wind tunnel.