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首页> 外文期刊>International journal of mechanics and materials in design >Containment of blade shedding in gas turbine engines: part Ⅱ-experimental and numerical investigations
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Containment of blade shedding in gas turbine engines: part Ⅱ-experimental and numerical investigations

机译：燃气轮机发动机中刀片脱落：第三部分 - 实验和数值研究

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In Part I, we purposely designed, developed and commissioned an instrumented functional scaled down test rig to examine blade shedding in gas turbine engine experimentally and numerically using the finite element method. Specifically, in Part II, we examine two cases involving blade shedding incidents. In the first, we study the interaction between a released and a trailing blade and in the second, we study the interaction between a released blade and a fully bladed disk. Three aspects of the work were accordingly examined in these two cases: (1) blade shedding trajectory, its interaction with the trailing blades and the containment ring, (2) the contact stresses in the containment ring as a result of the impingement of the released blade, and (3) the dynamic forces transmitted to the rotor mounting. Remarkably, the experimental results of the scaled down tests confirm the finite element predictions of a typical fan disk. In particular, they clearly show the influence of the trailing blades on the trajectory of the released blades, the large deformation of the trailing blades as a result of the momentum transfer between the trailing blades and the released blade, the final confinement of the released blade near the tip of the trailing blades and the stresses induced in the containment ring as a result of contact impingement. The results of our work should aid in the design of a proper containment ring and enhance the safety of gas turbine engines.
机译：在第一部分中，我们专门设计了设计，开发和委托了仪表功能缩小的试验台，以在实验和数值上使用有限元方法检查燃气涡轮发动机中的叶片脱落。具体而言，在II部分中，我们研究了涉及刀片脱落事件的两起案件。首先，我们研究释放和尾叶之间的相互作用，以及第二，我们研究释放刀片和完全叶片盘之间的相互作用。因此在这两种情况下检查了三个方面：（1）刀片脱落轨迹，其与尾随叶片的相互作用和容纳环，（2）由于释放的冲击而导致的容纳环中的接触应力刀片，和（3）动态力传递到转子安装。值得注意的是，缩放测试的实验结果证实了典型风扇盘的有限元预测。特别地，它们清楚地示出了后叶片对释放刀片的轨迹的影响，因此由于尾叶片和释放刀片之间的动量传递而导致尾叶片的大变形，释放刀片的最终限制靠近落叶叶片的尖端和由于接触冲击而引起的承受环中引起的应力。我们的工作结果应该有助于设计适当的遏制环并增强燃气轮机发动机的安全性。

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