A high temperature solid state turbine flame sensor has been developed and is being tested for eventual use as a combustor performance sensor. It directly senses only the flame deep ultraviolet without any response to hot component infrared energy (> 700 nanometers); the dynamic range is large; and the response time is fast enough for combustor control, i.e., less than 200 milliseconds.
The sensor electronics operate up to 250°C and some detector performance data has been taken as high as 540°C as described by Cusack et al (1994). The design uses recently available SiC electronic components, other components specially tested for the application, and proprietary techniques of electronic component packaging. Specific experience in packaging turbine engine optical and temperature sensors is necessary for this unique high temperature electronic technology.
A test program for discrete components indicates what elements are available for this temperature range and prototype sensor data from both laboratory qualification tests and engine performance tests verify the design.
