Novel Applications of Distributed Fiber-Optic Sensing for Turbine Engine Test Cell Instrumentation

摘要

While fiber optic technology has provided important contributions to measurement science over the last forty years, it is only relatively recently that the technology has started to be explored in harsh turbine engine environments. In this paper, we discuss improvement of the efficiency jet engine testing facilities by minimizing bulky instrumentation with many wires through the use of multiplexed multifunctional fiber optic sensors. The unobtrusive IFOS fiber optic network technology supports many sensors for accurate measurement of temperature, dynamic strain, vibration and pressure. For example, each fiber can support up to 32 sensors, and the network is scalable, so that, with 16 fibers, 512 sensors are supported. The sensor network can be designed to survive and operate in the harsh test cell environment. In fact, we have shown survivability of our fiber optic temperature sensors to 1800℉.