Acoustic Emission and Acousto-Ultrasonic Monitoring in High Temperature Environments

Abstract

This paper presents a summary of works completed towards the understanding of Acoustic Emission (AE) and Acousto-Ultrasonic (AU) monitoring in high temperature environments. An expanding interest into the development of hypersonic vehicles, operating at Mach numbers greater than five, present challenges with aerodynamic heating at temperatures exceeding 1000 °C. Monitoring of high-risk systems such as turbojet engines operating at high temperatures present similar challenges for vehicles currently in operation. This work comprises a short review of research into the effects of temperature for AE/AU monitoring as well as the Sensors and Actuators (S&As) that may be employed in these environments. A discussion is provided regarding considerations and techniques for the future of in-situ Integrated Vehicular Health Monitoring (IVHM) for AE/AU at high temperatures.