宽弦空心风扇叶片大鸟撞击试验研究

为了建立钛合金空心风扇单叶片大鸟撞击试验方法,针对宽弦钛合金空心风扇叶片开展了大鸟撞击叶片位置敏感性分析、鸟撞参数设计及鸟弹姿态控制研究,制定了大鸟撞击风扇叶片试验方案,完成了试验装置设计并进行了验证试验。结果表明:钛合金空心风扇叶片对大鸟撞击位置敏感性强,撞击最危险位置为50%叶高处;通过采用人工明胶鸟弹、优化弹托和增加泄压段,可有效提高鸟弹姿态控制精度;验证试验结果与设计预期吻合度良好,表明风扇叶片静止且鸟与风扇叶片的相对速度为工作状态下的大鸟撞击试验可有效模拟大鸟撞击叶片的冲击历程。

Study on Big Bird Strike Test of Wide-chord Hollow Fan Blade

In order to establish the test method of big bird strike with single blade of titanium alloy hollow fan,the position sensitivity analysis,bird strike parameter design and attitude control of big bird strike blade were carried out for wide-chord titanium alloy fan blade.The test scheme of the big bird strike fan blade was established,the design of the test device was completed and the verification test was carried out.The results show that the hollow fan blade of titanium alloy is sensitive to the strike position of big bird,and the most dangerous strike position is 50%leaf height.The bird attitude control accuracy can be effectively improved by using artificial gelatin bird shell,optimizing the shell case and adding the pressure relief section.The test results are in good agreement with the design expectation,which indicates that the big bird strike test can effectively simulate the big bird strike course on the blade when the fan blade is static and the relative velocity of bird and fan blade is working.