%0 Journal Article
%T Investigation of Macro-instability in a Stirred Vessel Using the Combined Approach of Power Spectral Density and Wavelet Analysis
应用功率谱密度与小波分析组合法研究搅拌槽内宏观不稳定性
%A JIN Zhe-shan
%A LI Zhi-peng
%A GAO Zheng-ming
%A HE You-jun
%A
金哲山
%A 李志鹏
%A 高正明
%A 贺友军
%J 过程工程学报
%D 2007
%I
%X Experiments were carried out in a flat-bottom cylindrical stirred tank with 0.476 m in diameter.The digital-signal processing approaches for macro-instability were analyzed and the combined approach of power spectral density and wavelet analysis was proved to be suitable for analyzing one-dimensional low-frequency signal with noise and peak value.The torque of the impeller was measured by torque transducer and analyzed by using the combined approach.The results show that there are macro-instabilities in the stirred vessel. The dimensionless macro-instability frequency(f/N) obtained by the combined approach was in good agreement with those from the literature.The combined approach of power spectral density and wavelet analysis was proved to be a useful tool for the investigation of macro-instability phenomenon.
%K stirred vessel
%K macro-instability
%K power spectra/density
%K wavelet analysis
%K torque
%K signal processing
搅拌槽
%K 宏观不稳定
%K 功率谱密度
%K 小波分析
%K 扭矩
%K 信号处理
%K 应用
%K 功率谱密度
%K 小波分析
%K 组合法
%K 研究
%K 搅拌槽
%K 不稳定性
%K Wavelet
%K Analysis
%K Power
%K Spectral
%K Density
%K Approach
%K Combined
%K Vessel
%K Stirred
%K 文献
%K 稳定频率
%K 无因次
%K 宏观不稳定现象
%K 存在
%K 结果
%K 实验数据
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=C60BCA716AE5E407E680A031DF65BA41&yid=A732AF04DDA03BB3&vid=DF92D298D3FF1E6E&iid=0B39A22176CE99FB&sid=6A73B36E85DB0CE9&eid=E2E0FBFE4D7EFB94&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=0&reference_num=17