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首页> 外文会议>Developments in strategic materials and computational design V >SOLID PARTICLE EROSION OF TBCS: JET TESTER MODELING AND EROSION FORECASTS
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SOLID PARTICLE EROSION OF TBCS: JET TESTER MODELING AND EROSION FORECASTS

机译：TBCS的固体颗粒侵蚀：射流试验机建模和侵蚀预测

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摘要

Thermal barrier coatings (TBC) are multi-layer system deposited on gas turbines components to protect their metallic surface from hot combustion gases. Depending on the operating conditions of the gas turbine, solid particle erosion can became critical for TBCs lifetime: in fact, sand, volcanic ashes could enter into the turbine promoting erosion. At RSE solid particle erosion tests have been performed in different testing conditions (particle speed, erodent composition, impingement angle and temperature) on TBC with different microstructures for comparison purposes. As A first step to forecast erosion in gas turbine, the laboratory jet tester has been simulated by a simple analytical model describing the speed of erodent particles as a function of their size and shape. By this way, for each TBC type, the volume eroded by a single particle is estimated and a rough evaluation of the overall erosion rate has been obtained, after a preliminary calibration of a kinetic energy model performed by using experimental data. Simulated erosion rate for four different types of TBCs (standard porous APS, EB-PVD, PS-PVD™ and highly segmented APS) has been investigated as a function of the test conditions, and compared with experimental data.
机译：热障涂层（TBC）是沉积在燃气轮机组件上的多层系统，以保护其金属表面免受高温燃烧气体的侵害。取决于燃气轮机的运行条件，固体颗粒腐蚀对于TBC的使用寿命可能变得至关重要：实际上，沙子，火山灰可能会进入涡轮机，从而促进腐蚀。在RSE中，出于比较目的，已经在具有不同微结构的TBC上的不同测试条件（颗粒速度，侵蚀成分，撞击角度和温度）下进行了固体颗粒侵蚀测试。作为预测燃气轮机腐蚀的第一步，实验室喷射测试仪已通过简单的分析模型进行了仿真，该模型描述了侵蚀颗粒的速度与颗粒大小和形状的关系。通过这种方式，在通过使用实验数据对动能模型进行初步校准之后，对于每种TBC类型，可以估算出单个颗粒侵蚀的体积，并获得了总腐蚀速率的粗略评估。已经根据测试条件研究了四种不同类型TBC（标准多孔APS，EB-PVD，PS-PVD™和高度分段的APS）的模拟腐蚀速率，并将其与实验数据进行了比较。

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