基于等效理论的RQL燃烧室掺混特性研究

采用RNG k-ε湍流模型对RQL（rich—burn／quick—quench／lean—burn）燃烧室内气流的掺混过程进行了数值模拟，运用等效思想，通过对混合流场内部温度、近壁区温度以及出口温度的分析，讨论不同掺混角度和掺混射流速度对RQL燃烧室混合特性的影响，进而了解RQL燃烧室工作时热流流场的结构状况。研究结果表明，不同的掺混气流入射角度和速度，对RQL燃烧室内气流掺混的高温区位置、壁面温度以及出口温度分布的影响明显。

Simulation study of mixing characteristics of RQL combustor based on equivalent theory

RNG k-ε turbulent model was applied to the numerical simulation of turbulent mixing processes in a RQL（rich-burn/quick-quench/lean-burn） gas turbine combustor. The influence of different mixing angle and mixing jet velocity on mixing characteristics of RQL combustor is discussed based on the concept of equivalent isothermal flow, and according to the analysis results of internal temperature of mixing flow field, temperature distribution near wall region and temperature at outlet. SIMPLE algorithm was used to solve the finite difference equations. The calculations are in agreement with experimental data. The research results indicate that it is obvious that the mixing incident angle and velocity affect the high-temperature mixing flow zone location inside the RQL combustor, the temperature on wall surface and the temperature distribution at the outlet.