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为了考察静叶轮毂间隙对压气机气动性能的影响以及揭示静叶轮毂间隙流动增强压气机稳定性的机理,以某型发动机高压压气机中两级为研究对象,运用三维粘性稳态数值模拟方法重点考察了静叶轮毂间隙附近的流动情况,从能量损失角度进一步分析了不同大小间隙导致压气机性能优劣的原因。研究结果证明,适当大小的间隙可以削弱静叶近轮毂处二次流和旋涡运动,改善当地流动状况,从而减少能量损失,提高压气机性能,特别是能增大喘振裕度。这些积极作用有利于压气机高效、稳定运行。
In order to investigate the influence of stator vane hub clearance on the aerodynamic performance of compressor and the mechanism of enhancing the stability of the compressor by enhancing the clearance flow of stator vane hub, two-stage high pressure compressor for a certain type of engine was studied. Three-dimensional viscous steady-state numerical simulation Focusing on the flow around the clearance of the stationary vane hub, the reasons for different performance of the compressor due to different clearances are further analyzed from the perspective of energy loss. The results show that proper clearance can weaken the secondary flow and vortex motion near the hub and improve the local flow conditions, thus reducing the energy loss and improving the performance of the compressor, especially increasing the surge margin. These positive effects are conducive to efficient and stable operation of the compressor.