[학술강연] 프로펠로 홴 날개면의 압력측정에 관한 실험적 연구

The experimental setup consisted of a rotating shaft coupled to an instrumentation-cum-power supply slip ling driven by a variable speed d.c motor. Pressure measurement of blade surface was investigated experimentally. In this case, propeller fan was operated with low speed, such as 500rpm, 750rpm and 1000rpm. That is operated with the low speed to reduce noise ingredient that is happened in slip ring when the speed of d.c motor is high. As these experimental results, it was found that the maximum pressure moved to blade center as the rpm increase in positive pressure surface of propeller fan. However, maximum pressure moved to blade tip as the rpm increase in negative pressure surface.