摘要
随着现代工业的发展,粉尘爆炸事故发生的频率也逐年增加,因此,对粉尘云点火敏感程度进行测量和计算就变得十分重要。粉尘云最小点火能是粉尘爆炸重要的特性参数之一,是采取粉尘爆炸防护的基础。最小点火能在测量的过程中受到多个敏感条件的影响,其中湍流则是最复杂的影响因素之一。文中对实验过程中粉尘云的湍流进行了定义,并分析了湍流对粉尘云最小点火能影响的内在原因;同时对通过数值模拟计算粉尘云最小点火能过程中的湍流计算给出了数学模型。从实验和数学模型两个方面对湍流进行了全面描述,对粉尘云电火花点火过程中湍流影响的分析结论,可有效的指导实验。
The frequency of dust explosions has been rising with the development of modern industry, so it is very important to measure and calculate the ignition sensitivity of dust clouds. Minimum ignition energy （MIE） of dust cloud is an important characteristic parameters of dust explosion, which is the basis of dust explosion protection. MIE is affected by a number of sensitive conditions during the measurement process, and turbulence is one of the most complex factors. The turbulence of dust cloud during experimental process is defined and the underlying reasons for turbulence effect on MIE of dust cloud is analyzed. A mathematical model for turbulence calculation in the numerical simulation of the dust cloud ignition processes is put forward. Comprehensive description of turbulence is gave based on experiment and mathematical model. The results from the analysis of turbulence effect on spark ignition process of dust cloud can effectively guide experiments.
出处
《中国安全生产科学技术》
CAS
北大核心
2009年第6期26-29,共4页
Journal of Safety Science and Technology
基金
国家自然科学基金资助项目(编号:50674023)
关键词
粉尘爆炸
最小点火能
湍流
Dust explosion
Minimum ignition energy （MIE）
Turbulence
