Adhesive transfer in aero-engine abradable linings contact
Adhesive transfer in aero-engine abradable linings contact
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DOI：
10.1016/j.wear.2013.04.033
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发表时间：
2013-07
期刊：
影响因子：
5
通讯作者：
N. Fois;J. Stringer;M. Marshall
中科院分区：
文献类型：
--
作者：
N. Fois;J. Stringer;M. Marshall
在一个缩比试验台上研究了可磨耗衬片的磨损，再现了在航空发动机压气机中叶片尖端和可磨耗材料之间观察到的磨损机制。已使用频闪成像技术对磨损过程进行表征，该技术能够研究叶片尖端撞击耐磨材料的性质，以及试验期间材料向叶片尖端的粘合剂转移。在侵入率低的测试中发现存在粘合剂转移，而在侵入率高的测试中观察到切割行为。采用频闪成像技术进行分析，可记录试验期间粘合剂转移与摩擦长度的关系。在测试过程中，确定了粘合剂转移的三个阶段：低粘合率的起始阶段、稳态粘合和粘合材料断裂，然后重新起始。这些结果还强调了在测试结束时对粘附材料进行分析的标准做法不一定能令人满意地解释粘合剂转移的整体力学。
Wear of abradable linings has been investigated on a scaled test rig platform, re-creating the wear mechanisms observed between the blade tip and abradable material that occur in an aero-engine compressor. The characterisation of the wear process has been performed using a stroboscopic imaging technique, capable of investigating the nature of the blade tip strike on the abradable, and the adhesive transfer of the material to the blade tip during a test. It was found in tests with low incursion rates that there was adhesive transfer, whereas with high incursion rates a cutting behaviour was observed. Analysis with the stroboscopic imaging technique allowed the adhesive transfer during the test as a function of the rub length to be recorded. Three phases were identified for adhesive transfer during test; an initiation phase with low rate of adhesion, steady state adhesion, and fracture of adhered material followed by re-initiation. These results also highlight how the standard practice of performing analysis of adhered material at the end of a test does not necessarily characterise the overall mechanics of adhesive transfer satisfactorily.