多级压气机近失速工况湿压缩数值研究  

Numerical Simulation of Multistage Compressor With Wet Compression Near Rotating Stall Condition

作　　者：罗铭聪 郑群[1] 孙兰昕 邓庆锋[1] 王强[1] 杨俊杰[1] 张海[1] 

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《工程热物理学报》2013年第3期423-426,共4页Journal of Engineering Thermophysics

摘　　要：湿压缩技术是目前能够提高燃机功率及效率的一种经济有效的手段。本文利用CFX软件平台,选择k-ε湍流模型,利用安托万方程求蒸气饱和压力,选用CAB气动力二次破碎模型,对某八级亚声速压气机的近失速工况进行进口加湿湿压缩三维数值模拟研究。模拟结果表明,进口湿压缩降低了此八级亚声速压气机的气流温度及比压缩功,很大程度上提高了压比及流量;明显缩小了第八级动叶的低能流动区域并抑制了静叶中吸力面大范围的分离流动,提高了此多级压气机的通流能力,使其退出近失速工况。Wet compression is currently an economical and effective method of improving power and efficiency of gas turbines. By employing software CFX, wet compression effects on an eight-stage axial subsonic compressor operating near the rotating stall condition is simulated and analyzed through adopting k - ε turbulence model, using the Antoine equation for vapor saturation pressure and choosing CAB model as the secondary aerodynamic breakup model. The simulation results show that wet compression could improve the flow capacity, increase pressure ratio, reduce the air temperature and specific compression work as the compressor working near stall condition. The low energy flow region of the 8th rotor passage and the separated region on suction surface of the stator could be abated or even eliminated by inlet fogging and thus moving the compressor away from the stall working condition.

关 键 词：八级亚声速压气机 湿压缩 进口加湿 近失速工况 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]