Abstract: Three-dimensional axial compressor model is established by using the method of mesh in Gambit and the different boundary of compressed N-S equation is evaluated.Based on the turbulent model of standard model k-ε of double equation,diversified through the finite volume method and calculated by that the characteristic curve of compressor is plotted with the data of Fluent algorithm and classic formula algorithm.Then through the simulation validates the reliability of the three-dimensional numerical simulation,analysis the instability process of compressor under different rotating speed in the rotating stall and surge characteristics and recovery calculation process after instability.Finally,imported the active actuator close coupled valve(CCV),compressor characteristic curve of non-dimensional flow and pressure is changed because of the different CCV opening.It reduces the least flow of compressor in other words,the result of importing CCV is that the characteristic curve of compressor moves to the left,and expands the steady operating areas of compressor greatly.It is important for avoiding instability.

Key words: axial compression system, three-dimensional numerical simulation, instability, N-S equation, CCV

摘要： 通过划分网格的方法在Gambit中建立了轴流压气机的三维模型,求得了不同边界条件下的可压缩N-S方程,基于双方程模型中的标准k-ε湍流模型,采用有限体积法对方程进行离散,计算了压气机的各类工作参数并绘制了Fluent算法与经典公式算法下数值的压气机特征曲线。然后通过仿真实验,验证了三维数值模拟的可靠性,模拟分析了压气机失稳过程即在不同转速下的旋转失速和喘振特性以及失稳后的恢复计算过程。最后引入了紧连控制阀(CCV)执行机构,通过CCV的不同开度,改变压气机量纲1流量、压升的特性曲线,即压气机的最小流量有所减少,可以将压气机特性曲线向左移动,大大增加了稳定范围,这对于防止失稳是很重要的。

关键词: 轴流压气机, 三维数值模拟, 失稳, N-S方程, CCV