高压燃烧室进气雷诺数对旋流预混燃烧特性的影响

采用数值模拟的方法对干式低排放高压燃烧室的燃烧特性进行研究，通过与文献中实验数据对比，验证了模型的正确性。分析了不同进气雷诺数下燃烧室的速度场、压力场及燃烧室出口截面温度的分布情况。结果表明，雷诺数对燃烧室内的流场影响较大。随着雷诺数的增加，燃烧室的回流区范围增大，燃气流速增加。燃烧室出口温度上升，燃烧室出口截面中心区域温度由外向内呈升高趋势。

Investigation on Premixed Combustion Characteristics with Radial-Swirled Flow in High Pressure Combustion Chamber

The combustion characteristics of a dry low emission high pressure combustion chamber are studied through numerical simulation. Then the model is validated by comparing the simulation result with the experimental data in the literatures. The velocity field, pressure field and temperature distribution at the exit of the combustion chamber under different inlet Reynolds number are analyzed. It is shown from the results that the value of Reynolds number has great impact on the flow field in the combustion chamber. As the Reynolds number increases, the central recirculation zone tends to expand with higher axial velocity at the central recirculation zone. In addition, the temperature at the exit of the combustion chamber rises, where the cross section temperature gradually increases from the external to the center. Besides, as the flow distance increases, the maximum velocity and range of the recirculation zone tend to decrease with the intensity of the reflux lessened and shrinking area of the external recirculation zone.