Study on tip clearance measurement system (2nd report, characteristics of the system and measurement)

摘要

Using the discharge-type blade tip clearance measurement system which was designed for testing, the following were clarified. According to paschen's law gas pressure exerts and effect on the measured values; however, the results of the experiment showed that the measured values were not affected by pressure with the minimum discharge voltage. It was confirmed that when the speed of the probe was high, sometimes the probe came in contact with the balde tip.