Gas-temperature imaging in a low-pressure flame reactor for nano-particle synthesis with multi-line NO-LIF thermometry
Gas-temperature imaging in a low-pressure flame reactor for nano-particle synthesis with multi-line NO-LIF thermometry
复制标题
使用多线 NO-LIF 测温法进行纳米粒子合成的低压火焰反应器中的气体温度成像
DOI：
10.1007/s00340-007-2721-8
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
C. Schulz
中科院分区：
文献类型：
--
作者：
H. Kronemayer;P. Ifeacho;C. Hecht;T. Dreier;H. Wiggers;C. Schulz
采用多线NO-LIF温度成像技术对低压预混平焰纳米粒子发生器中纳米粒子合成过程中的二维气体温度场进行了测量。这是第一次将这种免标定技术应用于低压燃烧系统。将激光能量密度限制为4 kW/cm 2，以避免LIF信号饱和，这会影响温度结果。在使弹性散射光最小化的同时，LIF检测系统的效率提高。这使得测量具有低示踪剂浓度，不影响纳米颗粒生成过程或火焰化学。在175×50 mm 2的视场内，采用优化的激发光谱扫描范围测量了600 ~ 1500 K的火焰温度，测量精度为± 2%。结果发现，二氧化钛纳米粒子的生成过程中不影响火焰温度在典型的操作条件下。压力对温度分布的影响进行了研究。这些数据是基于动力学建模的纳米颗粒形成模拟所必需的。
Multi-line NO-LIF temperature imaging was applied to measure two-dimensional gas-temperature fields in a low-pressure, premixed flat-flame nano-particle generator during nano-particles synthesis. It was the first time that this calibration-free technique was applied in a low-pressure combustion system. The laser fluence was limited to 4 kW/cm2 in order to avoid saturation of the LIF signal, which influences the temperature results. While minimizing the elastically scattered light, the efficiency of the LIF detection system improved. This enables measurements with low tracer concentrations that do not influence the nano-particle generation process or the flame chemistry. An optimized scan range for excitation spectra was applied to measure flame temperatures between 600 and 1500 K in a 175×50 mm2 field with an accuracy of ±2%. It was found that the TiO2 nano-particle generation process does not influence the flame temperature under typical operating conditions. Pressure effects on the temperature distribution were investigated. The data is required for the simulation of nano-particle formation based on kinetic modeling.