A Concept for Working Point Determination of Axial Compressors Based on Blade Deflection Measurements with Optical Sensors

摘要

Today, the working point identification of axial compressors is not sufficient, especially of aircraft engine compressors. For this reason, considerable efficiency losses occur in certain working points. The sensors of commonly used measurement methods have to be placed directly in the compressor airflow. This location is not desirable because the sensors are creating vortexes. This paper shows a new method of working point determination of axial compressors. The new developed measurement system with optical sensors provides a contactless blade deflection measurement without influencing the air flow. The assumption is that blade deflections contain information about the actual compressor working point. The advantage of this technique is the minimal invasive nature. Experiments on an axial compressor have approved the assumption and potential of this technique.