摘要
采用三维数值计算方法对发动机直榫槽、斜榫槽两种出口结构的预旋系统开展模拟,研究改变预旋系统出口几何结构对叶片供气通道气体流动及压力损失的影响,并与一维工程计算方法对比。结果表明:榫槽结构由直榫槽改成斜榫槽对叶片供气通道压力损失影响较小,两种结构预旋系统进出口流量差异较小,系统出口各腔流量分配略有差异;数值计算与工程计算结果在系统进口、出口无量纲流量差别较小,上封严出口、下封严出口无量纲流量差别较大,相对偏差接近50%,封严区域流动换热复杂,需要进行三维仿真计算,以提高设计精度。
Three-dimensional numerical calculation methods were used to simulate the pre-swirling system with two different outlet structures:straight and oblique mortise groove,for a certain aero-engine,the effect of changing the outlet geometric structure of the pre-swirling system on the gas flow characteristics and pressure loss of the blade air supply channel was studied.Results were compared with one-dimensional engineering calculation methods,outcome shows show that changing the straight mortise groove structure to an oblique one has little effect on the pressure loss of the blade air supply channel.The inlet and outlet flow rates of the pre-swirl systems of the two structures are slightly different,and there are slight differences in the flow distribution of each cavity at the outlet of the system.The dimensionless flow rates at the inlet and the outlet of the system calculated numerically are slightly different from those calculated by engineering methods,while the non-dimensional flow rates at the outlet of the upper and lower seals are significantly different,with a relative deviation of nearly 50%,the flow and heat transfer in the regions of the upper and lower seals are complex,requiring the use of three-dimensional numerical simulation calculations to enhance design accuracy.
作者
朱晓华
古冬
郭文
刘松
ZHU Xiaohua;GU Dong;GUO Wen;LIU Song(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China)
出处
《燃气涡轮试验与研究》
2024年第2期49-54,共6页
Gas Turbine Experiment and Research
关键词
航空发动机
预旋供气系统
榫槽结构
压降
无量纲流量
数值模拟
工程计算方法
aero-engine
pre-swirl system
mortise groove structure
pressure drop
dimensionless flow rate
numerical simulation
engineering methods
