家用燃气灶具红外辐射光谱实验分析

Experimental Analysis of Infrared Radiation Spectrum of Domestic Gas Cooking Appliance

提出一种基于火焰辐射光谱特性对大气式和红外式灶具进行区别的实验测试方法。采用红外傅里叶光谱仪搭建了实验测试系统,对3个型号灶具的辐射光谱进行了测试与分析。获得了3个型号灶具在2.5~15μm波段的光谱特性,研究了不同测试模式、供气压力对测试光谱的影响。大气式与红外式灶具的红外辐射光谱仅在2.5~10μm波段有明显的差异,只有竖直测试模式能够有效区分两种灶具的辐射光谱。大气式和红外式灶具的辐射光谱在2.6~3.1μm和4.1~4.7μm两个波段存在较强的辐射峰。大气式灶的辐射光谱除上述辐射峰之外,在其他波段的辐射较弱,在这两个波段发射的能量超过了总辐射能的80%。红外式灶除了高温气体的辐射外,还叠加了被气体加热的固体连续型再发射。随着供气压力的增加,大气式灶火焰光谱辐射峰的位置没有改变,辐射峰的光谱辐射力增大。红外式灶除了燃烧气体的辐射峰光谱辐射力增大外,在3~10μm波段的连续型辐射也明显增大。准确区分大气式和红外式灶具,或是两种灶具的混合改良形式,应通过灶具的外形结构、燃烧组织形式、红外波段的光谱特性进行综合判断。

An experimental test method for distinguishing between atmospheric and infrared cooking appliances based on the spectral characteristics of flame radiation is proposed.The experimental test system was built by infrared Fourier spectrometer,and the radiation spectra of the three types of cooking appliances were tested and analyzed.The spectral characteristics of the three types of cooking appliances in the waveband of 2.5 to 15μm were obtained,and the effects of different test modes and gas supply pressures on the test spectrum were studied.The infrared radiation spectra of atmospheric and infrared cooking appliances are only significantly different in the waveband of 2.5 to 10μm.Only the vertical test mode can effectively distinguish the radiation spectra of the two types of cooking appliances.The radiation spectra of atmospheric and infrared cooking appliances have strong radiation peaks in two wavebands of 2.6 to 3.1μm and 4.1 to 4.7μm.In addition to the above-mentioned radiation peaks,the radiation spectrum of the atmospheric cooking appliance is weaker in other wavebands,and the energy emitted in these two wavebands exceeds 80%of the total radiant energy.In addition to the radiation of high temperature gas,the infrared cooking appliance is superimposed with a solid continuous re-emission heated by gas.As the gas supply pressure increases,the position of the flame spectrum radiation peak of the atmospheric cooking appliance does not change,and the spectral radiation force of the radiation peak increases.In addition to the increase of spectral radiation force of the radiation peak of the combustion gas,the infrared cooking appliance has a significant increase in the continuous radiation in the waveband of 3 to 10μm.The accurate distinction between atmospheric and infrared cooking appliances,or the mixed and improved forms of the two types of cooking appliances should be comprehensively judged by the shape and structure of the cooking appliances,the combustion organization,and the spectral characteristics of the infrared waveband.