Measuring the true burning rate of a solid rocket motor (SRM) is a challenging problem in SRM research and development. Ultrasonic measurement has been proven to be a feasible solution. This study provides an overview of the related technologies for measuring dynamic and large-scale motor burning rates using ultrasonic technology. Static tests of steel shell/propellant assembly and high-temperature verification tests of the steel shell solid motor are carried out using low-frequency ultrasonic technology. After review and experimental verification
it is determined that low-frequency ultrasonic is the most feasible approach for measuring the burning rate of large-scale SRM. A further research direction is to optimize the probe layout. The study also provides suggestions for ultrasonic data processing.
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