论文部分内容阅读
采用FLUENT软件对旋转冲压压缩转子试验系统通流部分进行了不同出口反压和转速下的数值模拟.结果表明:旋转冲压压缩转子特性线较为陡峭,其稳定工作范围小,相对流量宽度由26.57%降到1.96%.反压大或转速低时,导叶受旋转冲压压缩转子低压区影响减弱,反压和转速对导叶段气流损失影响不大.旋转冲压压缩转子在反压增加时,其内部气流相继经历斜激波、λ激波/激波串、λ激波/正激波、λ激波4个压缩阶段.转速增加时,压缩面区域形成的激波在机匣壁面的入射点逐渐向下游发展,旋转冲压压缩转子压比增大的同时损失增加.出口支板段随反压增加存在最小损失工况,转速增加时,其总压恢复系数由0.944逐渐降低到0.875,气流损失增加.
FLUENT was used to simulate the flow through the rotary stamping compression rotor test system under different backpressure and rotation speed.The results show that the characteristic curve of the rotary stamping rotor is steep and the stable working range is small.The relative flow width is from 26.57% Down to 1.96% .When the backpressure is large or the rotation speed is low, the guide vane is weakened by the low pressure region of rotary compression rotor, and the backpressure and rotation speed have little effect on the air flow loss in the guide vane.When the backpressure increases, The internal air flow successively experiences four stages of diagonal shock, λ shock / shock train, λ shock / forward shock, and λ shock, and when the rotational speed increases, the shock wave formed in the compressive plane will enter the compressor at the incident point And the loss gradually increases with the increase of the pressure ratio of the rotating ram-compression rotor.The minimum loss condition occurs in the exit slab segment with increasing backpressure, and the total pressure recovery coefficient decreases gradually from 0.944 to 0.875 when the rotation speed increases, and the air flow loss increase.