Effects of preheating fuel gas to micro-scale flame

被引：0
|
作者：
Zhou J. [1 ]
Wang Y. [1 ]
Yang W. [1 ]
Liu J. [1 ]
Wang Z. [1 ]
Cen K. [1 ]
机构：
[1] State Key Laboratory of Clean Energy Utilization, Zhejiang University
来源：
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | 2010年 / 41卷 / 08期
关键词：
Micro combustion; Numeric simulation; Performances analysis; Preheating temperature;
D O I：
10.3969/j.issn.1000-1298.2010.08.019
中图分类号：
学科分类号：
摘要：
The effect of preheating was investigated in a straight-tube shape micro combustor. Performances of combustor were compared under conditions with different preheating temperature. The flow rates of the fuel feed amount were 0.12, 0.24, 0.36L/min, respectively. The preheating temperatures were environmental temperature (23°C), 250°C, 500°C, respectively. Experimental results showed that with environmental temperature and 0.12L/min, the stability limit was 0.339-3.639. While the preheating temperature increased to 250°C, the stability limit extended to 0.317-4.304. At the preheating temperature of 500°C, the stability limit was 0.453-1.706. The temperature distribution on the combustor wall was measured, which was combined with numeric simulation to investigate the combustion process in the combustor. Simulation results indicated that the peak temperature in the reaction region increased with preheating temperature. At 0.24L/min and stoichiometry, while the preheating temperature increased from environmental temperature to 500°C, the peak temperature increased from 1890 to 2013K. It proved that the proper preheating could increase the reaction temperature, thus inhibited thermal extinction.
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页码：90 / 93+106
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