A Study on the Development of a Cross-Flow Fan with a Random Distribution of Blades : Study on the Determination of Random Distribution

무작위 날개 배열을 갖는 횡단류 팬의 개발 : 무작위 배열의 선정

A cross-flow fan often generates discrete noise call blade passing frequency tones. Several methods have been investigated to reduce this BPF noise, where the random distribution of blades is the most promising one. A simple and effective algorithm to determine a random distribution of blades is proposed which considers fan. performance as well as noise characteristics. The proposed method is verified by a simple numerical model and is applied in manufacturing cross-flow fan samples. Also some experiments are carried out and the experimental results are analyzed.