燃气分析法在高温升全环燃烧室出口温度场试验中的应用

为了给某型高温升全环燃烧室的出口温度分布改进优化提供技术支持,采用燃气分析法和热电偶法2种测量方法测量出口温度场。燃气分析法通过2支5点非混合式取样器随旋转机构旋转1 80°,采集燃烧室出口600点样气,测量CO_2和CO_2种组分的体积分数进而计算燃气温度。在油气比0.03状态下,燃气分析法与热电偶法测量的燃烧室出口温度分布基本一致,在油气比0.037状态下,燃气分析法测到的热点温度达到2285 K,经误差分析得出CO_2和燃料热值的测量偏差对燃气分析法的温度测量影响较大,采用的燃气分析法测温系统总误差在1%以内。研究结果表明:燃气分析法是1种具有较高测试精度、可靠的高温测试技术。

Application of Gas Analysis Method on High Temperature RiseFull Annular Combustor Outlet Temperature Field Test

Gas analysis method and thermocouple method were taken to measure outlet temperature field to provide the technical support for the optimization of outlet temperature distribution of high temperature rise full annular combustor. Two five-hole samplers were fixed on a traverse gear, swinging 180° and collecting six hundred gas samples from combustor outlet, the gas temperature were calculated by measuring carbon dioxide and carbon monoxide. The combustor outlet temperature distribution measured by gas analysis method and thermocouple method are consistent basically at fuel/air ratio 0.03. The hot-spot temperature measured by gas analysis method was 2285 K at fuel/air ratio 0.037. The error analysis show that the primary factors which affect oreatly gas analysis measuring temperature are carbon dioxide and fuel calorific value. The overall error of greatly gas analysis test system is better than 1%. The result show that gas analysis method is a reliable high temperature measurement technique with high precision.