| 撞击式火焰噪声信号的分形特性分析 |
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| 引用本文： | 颜世森,郭庆华,梁钦锋,于广锁,于遵宏. 撞击式火焰噪声信号的分形特性分析[J]. 动力工程, 2008, 28(4) |
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| 作者姓名： | 颜世森 郭庆华 梁钦锋 于广锁 于遵宏 |
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| 作者单位： | 华东理工大学,煤气化教育部重点实验室,上海,200237 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) , 上海市"曙光计划" , 教育部跨世纪优秀人才培养计划 |
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| 摘 要： | 火焰噪声信号的Hurst分析可以作为火焰气化燃烧稳定性的一个判据.通过对气化火焰噪声信号的分析,研究了气化燃烧火焰的稳定性.采用域重新标度分析法研究了撞击火焰噪声波动信号,得到了相应的Hurst指数,结果表明:撞击火焰噪声波动具有分形特征;噪声波动信号中存在周期成分;气化燃烧工况的不稳定性会导致火焰噪声的明显提高;随着氧燃比的增加,Hurst指数减小.
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| 关 键 词： | 自动控制技术 域重新标度分析 分形 燃烧噪声 撞击火焰 |
Rescaled Range Analysis on Noise Signal of Impinging Flames |
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| YAN Shi-sen,GUO Qing-hua,LIANG Qin-feng,YU Guang-suo,YU Zun-hong. Rescaled Range Analysis on Noise Signal of Impinging Flames[J]. Power Engineering, 2008, 28(4) |
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| Authors: | YAN Shi-sen GUO Qing-hua LIANG Qin-feng YU Guang-suo YU Zun-hong |
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| Abstract: | Hurst analysis of the flame noise signal can be used as a criterion for the stability of the flame gasification and combustion.The stability of the gasification and combustion flame was investigated through the analysis of the flame noise signals.The noise signals of the impinging flames were studied with the Rescaled Range analysis,and corresponding Hurst exponents were obtained.Results showed that the noise signals of the impinging flames possessed the fractal characteristics.And periodic component was found in the fluctuating noise signal.The flame noise increased remarkably due to the instability of gasfication and combustion.With the increase of the ratio of oxygen to fuel,the Hurst exponents decreased. |
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| Keywords: | automatic control technique rescaled range analysis fractal combustion noise impinging flames |
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