KEYWORDS: Long wavelength infrared, Temperature sensors, Temperature metrology, Combustion, Sensors, Windows, UV optics, Thermal effects, Systems engineering, Simulations
A compact long-wavelength infrared (LWIR) borescope imaging sensor is developed for non-contact 2D surface temperature measurements in combustor engines. LWIR detection minimizes optical interferences from hot combustion gases and soot. The borescope probe is shielded by the custom-build compact water-cooled probe housing, which can sustain flame temperature up to 2400 K at a pressure of 50 bar. The design, construction, and characterization of the sensor are discussed in detail. The developed LWIR sensor has promising applications in surface temperature measurements of engine components. This study may aid propulsion system engineers and researchers in designing thermal management systems and optimizing operation.
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