Kogia Maria, Gan Tat-Hean, Balachandran Wamadeva, Livadas Makis, Kappatos Vassilios, Szabo Istvan, Mohimi Abbas, Round Andrew
Brunel Innovation Centre (BIC), Brunel University, Cambridge CB21 6AL, UK.
TWI Ltd., Granta Park, Great Abington, Cambridge CB21 6AL, UK.
Sensors (Basel). 2016 Apr 22;16(4):582. doi: 10.3390/s16040582.
Guided Wave Testing (GWT) using novel Electromagnetic Acoustic Transducers (EMATs) is proposed for the inspection of large structures operating at high temperatures. To date, high temperature EMATs have been developed only for thickness measurements and they are not suitable for GWT. A pair of water-cooled EMATs capable of exciting and receiving Shear Horizontal (SH₀) waves for GWT with optimal high temperature properties (up to 500 °C) has been developed. Thermal and Computational Fluid Dynamic (CFD) simulations of the EMAT design have been performed and experimentally validated. The optimal thermal EMAT design, material selection and operating conditions were calculated. The EMAT was successfully tested regarding its thermal and GWT performance from ambient temperature to 500 °C.
提出了使用新型电磁超声换能器（EMAT）进行导波检测（GWT），用于检测在高温下运行的大型结构。迄今为止，高温EMAT仅用于厚度测量，不适用于GWT。已开发出一对水冷EMAT，能够激发和接收用于GWT的水平剪切（SH₀）波，并具有最佳的高温性能（高达500°C）。对EMAT设计进行了热和计算流体动力学（CFD）模拟，并通过实验进行了验证。计算了最佳热EMAT设计、材料选择和操作条件。对EMAT从环境温度到500°C的热性能和GWT性能进行了成功测试。
