论文部分内容阅读
为了研究不同转速比对对转压气机最先失速级的影响,就对转压气机在不同转速比下的全工况特性进行了数值模拟,并分析了近失速点两排反转转子(转子1和转子2)内的流场。结果表明:转速比变化不影响该压气机失速的初始扰动类型,即在不同转速比下该压气机中出现的失速初始扰动均为突尖波型;当转速比R2∶R1≥0.9时,由于转子2叶片气动负荷较重,间隙泄漏流的强度较大,转子2更早进入失速工况;而当转速比R2∶R1<0.9时,转子1先于转子2进入失速工况。
In order to study the effect of different speed ratios on the first stalling stage of the turbo compressor, the full-scale characteristics of the turbo-compressor at different speed ratios were numerically simulated and analyzed. Two rows of counter-rotating rotors 1 and rotor 2). The results show that the change of speed ratio does not affect the type of initial disturbance of the compressor stall. That is, the initial disturbance of stall in the compressor at different speed ratios is the sudden sharp wave. When the speed ratio R2: R1 ≥ 0.9, The aerodynamic load of the rotor 2 blade is heavy, and the intensity of the leakage flow in the gap is larger, and the rotor 2 enters the stalling condition earlier. When the speed ratio R2: R1 <0.9, the rotor 1 enters the stalling condition prior to the rotor 2.