化工学报
化工學報
화공학보
JOURNAL OF CHEMICAL INDUSY AND ENGINEERING (CHINA)
2010年
2期
317-322
,共6页
王甜%徐俊%宋健斐%魏耀东%时铭显
王甜%徐俊%宋健斐%魏耀東%時銘顯
왕첨%서준%송건비%위요동%시명현
旋风分离器%旋转流%不稳定性%热线风速仪
鏇風分離器%鏇轉流%不穩定性%熱線風速儀
선풍분리기%선전류%불은정성%열선풍속의
cyclone%swirling flow%instability%hot wire anemometry
The instability characteristics of swirling flow in the cyclone were studied based on measured real tangential velocity by hot wire anemometry(HWA).The results showed that the real tangential velocity fluctuated obviously in the center region of the cyclone,however,near the wall of the cyclone,the real tangential velocity had a little fluctuation.The real tangential velocity was analyzed with Fast Fourier Transform(FFT).There was a basic frequency near the center region of the cyclone,which was about 44Hz.And the amplitude in the center region was bigger than that near the wall.The real tangential velocity fluctuation indicated that there existed an instability of swirling flow in the cyclone.This instability resulted in the rotation center of the swirling flow deviating from the geometric center of the cyclone,which produced the quasi-periodic oscillation of swirling flow and gave the real tangential velocity fluctuation.
