叶片包容性试验研究

单个模型叶片包容性试验总的目的在于确定单个模型叶片折断后与机匣的碰撞姿态、损坏模式 ,定量测试机匣受叶片撞击时的瞬态应变响应 ,为建立有限元叶片包容性预测计算模型 ,为验证或建立包容曲线提供试验依据。1 .试验概况　模型叶片通过销钉装于轮盘上 ,在轮盘上对称位置通过销钉装了一个平衡块。平衡块比模型叶片短得多 ,但其离心力与模型叶片的离心力是正好相等的。在模型叶片叶身靠近根部的某个需要部位有两条对称的开口槽 (经Φ 0 .2 mm的钼丝线切割加工而成 )。当试验转子达到某一转速时 ,叶身将从开口槽处断开 ,叶身的前半部分 (以…

EXPERIMENTAL RESEARCH ON BLADE CONTAINMENT

This paper describes the blade containment tests for six sets of single model blade on a vertical breaking down tester with excess revolution.The experimental results indicate that the blade body fragment flying off impacts against the model aeroengine case time and again.The incident angle of the blade fragment against the case in the initial impact is smaller than in the later impacts,the case damage of the first impact is smaller than that of the final impact,and the impacts of the blade fragment against the case make the blade fragment crimple.In principle the experimental results of the blade fragment containment and non containment are consistent with the containment curve of single compressor blade (for use only in case of the blade body) in the Spey MK202 Stressing Standards (EGD 3) and are on the safe side.It is the preliminary conclusion that the containment curve of single compressor blade (for use only in case of the blade body) in EGD 3 can be used to predict the containment of the similar blade.