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采用参数化建模的方法,保持扩压器尺寸、外机匣最大直径以及燃烧室出口尺寸与单环腔燃烧室(SAC)一致,将燃烧室头部旋流器从双旋流结构设计为三旋流结构,采用三维数值模拟的方法对双旋流燃烧室(DSC)和三旋流燃烧室(TSC)的流动和燃烧过程进行数值模拟.对比研究了两种燃烧室在高温升条件下的性能.结果表明:传统的DSC已不能满足油气比为0.037的高温升燃烧室的燃烧效率等性能需求,TSC可获得比DSC更高的总压恢复系数、燃烧效率以及温升,更低的出口温度分布系数(OTDF)和径向出口温度分布系数(RTDF);在油气比为0.037情况下,设计的高温升TSC总压降在5%以内;OTDF为0.162,RTDF为0.106;燃烧效率大于99%.
The parametric modeling method is adopted to keep the size of the diffuser, the maximum diameter of the outer casing and the outlet size of the combustion chamber in accordance with the single-ring chamber (SAC). The head swirler of the combustion chamber is designed from the double- Three-Dimensional Numerical Simulation is used to simulate the flow and combustion process of double-swirl combustor (DSC) and three-swirl combustor (TSC). The effects of high temperature rise The results show that the conventional DSC can not meet the performance requirements such as the combustion efficiency of the high temperature combustion chamber with the ratio of oil to gas of 0.037. TSC can obtain higher total pressure recovery coefficient, combustion efficiency and temperature rise, lower (OTDF) and radial outlet temperature distribution coefficient (RTDF). Under the condition of oil-gas ratio of 0.037, the total pressure drop of TSC is less than 5%, OTDF is 0.162 and RTDF is 0.106. The combustion efficiency is greater than 99%.