跨声速自由滚转试验技术研究

采用中等展弦比、薄翼型、边条、锯齿、折叠翼等设计的先进作战飞机在跨声速易出现机翼突然失速现象，从而引起非指令性横滚运动。为研究该问题，在 FL-3风洞中研制了一套跨声速自由滚转试验装置，设计某验证性模型，选取马赫数范围0.8~0.95的典型飞行状态进行了静态测力和自由滚转验证性试验。试验结果预测了某模型不同构型的机翼突然失速敏感范围，并评估了非指令性横滚运动的严重程度，从而验证了试验机构的可靠性，建立了评估方法，实现了跨声速自由滚转试验技术。

Research on a free-to-roll transonic test capability

Some advanced aircrafts,especially those designed with using moderate aspect ratio,thin airfoil,trim,serrated,folding wings etc,are prone to encounter transonic abrupt-wing-stall,and furthermore bring out uncommanded lateral motion.To study the problem,due to the transonic abrupt wing stall,the free-to-roll test system was developed in the FL-3 Wind Tunnel.The static and free-to-roll wind tunnel tests for some aircraft models were conducted, including different configurations and different Mach number (0.8 ~ 0.95 ).The analysis used both the static and the dynamic wind test data to predict the abrupt wing stall sensitive range for the different configurations,and assess the corresponding severity of the uncommanded Lateral Motion.The characteristics of the uncommanded lateral motion caused by abrupt wing stall are predicted effectively at AVIC Aerodynamic Research Institute.The present study verifies the reliability of the testing facilities,establishes evaluation methods ,and achieves transonic free-to-roll test technique.