联接翼布局低速纵向气动特性初探

An Approach to the Low-Speed Longitudinal Aerodynamic Characteristics of the Joined Wing Configuration

本文基于低速风洞纵向测力以及涡格法的理论计算结果,初步探索了联接翼布局的低速纵向气动特性,并与相应的机翼、尾翼相分离的正常布局的试验结果作了比较。结果表明,联接翼布局具有许多优点,如较大的升为线斜率C_~α、较大升力系数C_(max)、较大的纵向稳定度、相当小的诱导阻力C_(zi)和较高的巡航升阻比K。还研究了在联接翼前部配置鸭翼对进一步提高和改善其纵向气动性能的可能性。

This paper conducts an investigation into the low-speed longitudinal aerodynamic characteristics of the joined wing configuration on the basis of the test results of the longitudinal forces measured in low-speed wind tunnel and the theoretical calculation of the vortex-lattice method, compared with the test results of the corresponding conventional wing-tail configuration. It is shown that the joined wing configuration has many advantages, for example, high lift curve slope Cya, maximum lift coefficient Cymax and longitudinal stability, high lift drag ratio K and relatively low induced drag Ca.The paper also approaches into the possibility of further increasing and improving the longitudinal aerodynamic characteristics of the joined wing configuration with the canard set in the front.