摘要
研究了射流火焰噪声和撞击式火焰噪声,对比两者以探求撞击流对火焰稳定性的影响。对火焰噪声信号进行频谱分析(FFT),结果表明,射流火焰噪声包含燃烧噪声和喷流噪声,火焰噪声以燃烧噪声为主,撞击式火焰噪声是主频约420Hz的高频噪声,由燃烧噪声、喷流噪声和撞击区燃烧噪声组成。撞击式火焰噪声频谱图表明,撞击流强化了气化燃烧,有利于火焰的稳定,对气化炉的稳定运行有重大意义。
Study on the noise of jet flame and the noise of impinging flame, and contrast the different noise. In order to find the effect which impinging stream imply on the flame stability, the noise signals are analyzed in frequency spectrum by Fast Fourier Transform Algorithm method（FFT）. Results show that jet flame noise, and the combust noise play great role in the flame noise. The main frequency of impinging flame noise is about 420Hz. The impinging flame noise include combust noise ,jet noise and impinging combust noise. The frequency spectrum diagrams of impinging noise show that impinging stream enhance the gasification and combustion. That is profit to the flame stability,and has been significant meaning on the stability running of gasifier.
出处
《洁净煤技术》
CAS
北大核心
2008年第4期40-42,51,共4页
Clean Coal Technology
基金
国家重点基础研究发展计划(2004CB217703)
上海市曙光计划(06SG34)
教育部新世纪优秀人才支持计划(NCET-06-0416)
关键词
撞击流
火焰噪声
燃烧噪声
频谱分析
impinging stream
flame noise
combustion noise
frequency spectrum analysis
