在燃气轮机燃烧室设计与研发过程中，为确定模化燃烧试验与设计参数之间的关系，本文在0～0.4MPa压力和550℃空气预热条件下搭建燃烧试验台，采用数值模拟和试验相结合的方式研究了模化参数对燃烧室总压损失系数、燃烧效率、火焰筒壁温及出口温度场的影响规律，并量化评估了总温探针对燃烧流场和温度场的干扰效应。结果表明，在所研究条件范围内，总温探针数量不多于5支、外径不大于14，且靠近燃烧室出口安装时，可有效降低测量干扰，确保温度场数据真实性；当模化压力高于0.3MPa时，模化压力对燃烧室性能无显著影响，其中，燃烧效率保持稳定99.99%、总压损失系数波动0.5%、OTDF变化仅0.1%，此时建立了火焰筒壁面平均温度和最高温度与仿真计算结果的拟合关系式；而当模化压力小于0.2MPa时，总压损失系数、燃烧室温度场均与设计工况偏差较大。本研究通过低压模拟实现了高压工况的有效表征，明确了0.3MPa作为模化压力临界阈值，可为燃烧室设计优化和试验测量方案提供有益参考。

During the design and development of gas turbine combustion chamber, to establish the relationship between model combustion tests and design parameters, a combustion test bench was established under pressures ranging from 0 to 0.4MPa and with air preheating at 550°C. Through numerical simulations and experiments, the effects of modeling parameters on the total pressure loss coefficient, combustion efficiency, flame cylinder wall temperature, and combustion chamber outlet temperature field were investigated. The results indicate that when the number of total temperature probes does not exceed five, their outer diameter does not exceed 14mm, and they are installed near the combustion chamber outlet, measurement interference can be effectively minimized, ensuring the authenticity of the temperature field data. When the modeling pressure exceeds 0.3MPa, it has no significant impact on the combustion chamber performance; specifically, the combustion efficiency remains stable at 99.99%, the total pressure loss coefficient fluctuates by only 0.5%, and the OTDF changes by merely 0.1%. Under these conditions, a fitting relationship between the mean and maximum temperatures of the flame cylinder wall and the simulation results was established. However, when the modeling pressure is below 0.2MPa, both the total pressure loss coefficient and the combustion chamber temperature field deviate significantly from the design conditions. This study successfully characterized high-pressure conditions through low-pressure simulations, identifying 0.3MPa as the critical threshold for modeling pressure. This finding provides valuable reference for optimizing combustion chamber design and developing test measurement schemes.

TK221

国家科技重大专项(J2019-Ⅲ-0012-0055)