论文部分内容阅读
为了解压气机级间封严的流动特性,以某航空发动机压气机为研究对象,对带有进出口旋转盘腔的级间篦齿结构进行了数值模拟.在压比范围为1.05~1.30,雷诺数范围为100~50 000下,研究了压比和雷诺数对篦齿泄漏特性、旋流特性和风阻温升特性的影响,对比了包括篦齿和进出口旋转盘腔的系统参数与仅含篦齿的直齿参数的不同.计算结果表明进出口旋转盘腔对篦齿的流动特性有较大的影响;随着压比的增大,流量系数增加,封严效果下降,出口旋转比和风阻温升减小;随着雷诺数的增大,流量系数明显增大,出口旋转比和风阻温升也显著减小;在高雷诺数时,流量系数、出口旋转比和风阻温升变化幅度微小.
In order to understand the seal characteristics of the compressor stage, the numerical simulation of the interlaminar lamellar structure with inlet and outlet rotating disks was carried out with an aero-engine compressor as the research object.With the pressure ratio ranging from 1.05 to 1.30, The Reynolds numbers ranged from 100 to 50 000. The effects of pressure ratio and Reynolds number on the leakage, swirl and temperature rise characteristics of the labyrinth teeth were investigated. The system parameters including the labyrinth tooth and the inlet and outlet rotary disks were compared with The results show that the inlet and outlet rotating disk cavities have a great influence on the flow characteristics of the labyrinth teeth. With the increase of the pressure ratio, the flow coefficient increases and the sealing effect decreases. The outlet rotation ratio And the temperature rise of the wind resistance decreases. With the increase of the Reynolds number, the flow coefficient increases obviously, the outlet rotation ratio and the temperature rise of the wind resistance decrease significantly. At high Reynolds number, the flow coefficient, the outlet rotation ratio and the temperature rise of the wind resistance change Small amplitude.