纵列式直升机双旋翼气动特性分析  

Aerodynamic Characteristics Analysis of Twin-rotor in Tandem Helicopter

作　　者：陈建炜 朱清华[1] 王坤 朱振华 申遂愿 CHEN Jianwei;ZHU Qinghua;WANG Kun;ZHU Zhenhua;SHEN Suiyuan(National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学直升机旋翼动力学国家级重点实验室,南京210016

出　　处：《航空工程进展》2020年第2期167-175,198,共10页Advances in Aeronautical Science and Engineering

基　　金：江苏高校优势学科建设工程资助项目。

摘　　要：纵列式直升机前后旋翼之间会产生复杂的干扰现象。针对两旋翼之间的气动干扰问题进行流场分析,建立基于动量源模型和N-S(Navier-Stokes)方程的数值分析方法,选用k-ω SST两方程湍流模型,采用基于压力隐式求解器,对所建立的求解方法进行算例验证;对悬停状态、前向来流状态、后向来流状态的纵列式双旋翼直升机前后旋翼干扰流场分别进行数值模拟,并结合计算结果与流场特性,对干扰流场所产生的气动现象进行分析。结果表明:悬停状态,前后旋翼性能均降低,后旋翼对前旋翼的性能影响较大;前向来流状态,后旋翼升力损失大于悬停状态;后向来流状态,前旋翼升力损失更为明显,最低处旋翼效率损失近半。There will be complex interference between the front and rear rotors of tandem helicopter. The flow field analysis is carried out for the aerodynamic interference between two rotors, the numerical analysis method based on momentum source model and N-S(Navier-Stokes) equation is established, the k-ω SST two equation turbulence model is selected, and the pressure implicit solver is used to verify the solution method;The interaction flow fields of the front and rear rotors of a tandem twin rotor helicopter in hover, forward flow and backward flow are simulated respectively. Combined with the calculation results and the flow field characteristics, the aerodynamic phenomena caused by the interference flow field are analyzed. The results show that in hover, the performance of the front rotor and the rear rotor decreases, and the performance of the front rotor is greatly influenced by the rear rotor;In the forward flow state, the lift loss of the rear rotor is greater than that in the hover state;In the backward flow state, the loss of lift of the front rotor is more obvious, and the loss of rotor efficiency at the lowest position is nearly half.

关 键 词：纵列式直升机 动量源 N-S方程 SST湍流模型 气动干扰 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]