CAJ | 학술논문

为改善单旋翼的拉力不足的问题，对具有前后对称翼型的共轴旋转机翼，进行悬停测力实验，探索了单、双旋翼的最佳安装角。通过三维非定常旋翼绕流的CFD数值模拟，分析了上下旋翼之间的相互干扰影响。研究发现，受上旋翼下洗流影响，下旋翼的最佳安装角远大于单旋翼最佳安装角；共轴旋翼间的气动干扰使下旋翼拉力减小比上旋翼拉力减小程度大。实验表明，同转速双旋翼最大拉力超过单旋翼最大拉力的两倍，表明在特定情况下，双旋翼能改善单旋翼的拉力不足的缺点。
위개선단선익적랍력불족적문제，대구유전후대칭익형적공축선전궤익，진행현정측력실험，탐색료단、쌍선익적최가안장각。통과삼유비정상선익요류적CFD수치모의，분석료상하선익지간적상호간우영향。연구발현，수상선익하세류영향，하선익적최가안장각원대우단선익최가안장각；공축선익간적기동간우사하선익랍력감소비상선익랍력감소정도대。실험표명，동전속쌍선익최대랍력초과단선익최대랍력적량배，표명재특정정황하，쌍선익능개선단선익적랍력불족적결점。
This paper presents thrust measurement and CFD validation of a coaxial rotating wing composed of the fore-and-after symmetrical airfoil in hovering .The optimal installation angles of the single and co-axial wings are investigated .Interference factors between coaxial wings are analyzed via 3 D unsteady flow simulation .The optimal installation angle of downstream wing is much larger than that of upstream wing . Aerodynamic interference between the coaxial wings leads to a significant thrust decrease of downstream wing than that of the upstream wing .It is found that the thrust of coaxial wing under optimal installation angle is twice more than that of the single wing ,which demonstrates that coaxial wing has the potential of enhance thrust in some condition .