高温升燃烧室喷油杆热防护试验研究

发布时间：2018-05-03 22:41

本文选题：高温升燃烧室 + 喷油杆　；参考：《推进技术》2016年12期

【摘要】：为研究高温升燃烧室喷油杆热防护问题,建立高温升燃烧室喷油杆热防护试验系统,设计加工三个不同尺寸隔热屏,探讨了进气温度、进气速度、供油压力、喷油杆布置方式和隔热屏方案等气动和结构参数影响喷油杆壁面温度、换热特性及油道出口燃油温度的变化规律。研究表明:当进气温度为903K,进气速度为36m/s,压力为0.22MPa时,不安装隔热屏的喷油杆出口燃油温度达到的最高温度为435K,随着供油压力增大,燃油出口温度逐渐降低,但最低温度也超过375K。三种方案隔热屏均能够起到对喷油杆的热防护,能够降低喷油杆壁面温度和油道出口燃油温度,考虑热防护效果和结构重量等综合因素,方案二隔热屏效果最佳,燃油出口最高温度不超过388K。
[Abstract]:In order to study the thermal protection of fuel injection rod in high temperature rising combustor, a test system for thermal protection of fuel injection rod in high temperature rising combustion chamber was established. Three heat insulation screens with different sizes were designed and processed, and the inlet air temperature, inlet air velocity and oil supply pressure were discussed. The air and structure parameters such as the configuration of the injection rod and the heat insulation shield scheme affect the wall temperature, heat transfer characteristics and the fuel temperature at the outlet of the fuel duct. The results show that when the inlet temperature is 903K, the inlet velocity is 36m / s, and the pressure is 0.22MPa, the maximum fuel temperature at the outlet of the injection rod without heat insulation screen is 435K. With the increase of the fuel supply pressure, the fuel outlet temperature decreases gradually. But the lowest temperature is over 375K. The heat insulation shield of the three schemes can provide thermal protection to the injection rod, reduce the wall temperature of the injection rod and the outlet fuel temperature of the oil channel. Considering the comprehensive factors such as thermal protection effect and structural weight, the second scheme has the best heat insulation screen effect. The maximum temperature of the fuel outlet does not exceed 388K.
【作者单位】：南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室;中国人民解放军理工大学国防工程学院;
【基金】：中央高校基本科研业务费专项资金(NS2014019)
【分类号】：V231.2

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