小型通勤类飞机失速特性的自由飞验证试验研究

在对某小型通勤类公务机进行风洞实验预测时,发现飞机失速后其滚转特性会发生急剧变化。在分析该型飞机风洞实验结果的基础上,采用机翼加装失速条的失速特性方法,通过缩比模型自由飞试验进行飞行验证,分析在巡航构型和着陆构型状态下原始机翼和机翼加装失速条后的试飞结果。结果表明:缩比模型自由飞试验能够验证机翼风洞试验的预测结果,加装失速条的失速特性改进方法可以改善飞机失速特性。

Research on free-flight validation test of stall Characteristics for Commuter category Airplanes

It is found that the rolling characteristic after airplane stall is rapidly changed, when the wind tunnel test prediction is conducted for the small commuter category airplanes. On the basis of analyzing the wind tunnel test results of the airplane, the stalling characteristic method that the stall strips is added on the wing is adopted, and the flight verification is performed by using free-flight test of scaled-model. After adding stall strips on the wing and the original wing, the flight results are analyzed under the states of cruising structure and landing structure. Results show that the scaled-model free-flight test can verify the prediction results of the wind tunnel test, and the stalling characteristic improved method by adding stall strips can improve the stall characteristic of airplane.