CAJ | 학술논문

对某13级轴流压气机的内部流场进行了全三维数值模拟数值分析。针对原型压气机变工况运行时静叶吸力面角区位置流动分离较为严重的情况，进行正弯优化设计，探讨正弯叶片的引入在全工况范围内对压气机前三级的流动特性带来的影响，并重点分析改型前后近喘振点的流场特征。结果表明，适当的弯叶片可以抑制角区闭式分离的发生和发展，从而恢复角区的扩压能力，并获得整个流场的改善，最终提高压气机的压比、效率和喘振裕度，同时级间匹配良好，变工况性能明显优于原型。
대모13급축류압기궤적내부류장진행료전삼유수치모의수치분석。침대원형압기궤변공황운행시정협흡력면각구위치류동분리교위엄중적정황，진행정만우화설계，탐토정만협편적인입재전공황범위내대압기궤전삼급적류동특성대래적영향，병중점분석개형전후근천진점적류장특정。결과표명，괄당적만협편가이억제각구폐식분리적발생화발전，종이회복각구적확압능력，병획득정개류장적개선，최종제고압기궤적압비、효솔화천진유도，동시급간필배량호，변공황성능명현우우원형。
Three-dimensional viscous flow filed numerical simulation was carried out for a 13-stages axialcompressor in this paper. For the flow separation at the corner of the first stage stator blade suction side is more serious, this paper will focus on the analysis of positive curved stator impact on compressor performance of the first three stages, especially analyze the flow field characteristics close to surge points. The results show that appropriate curved blades can control the occurrence and development of closed separation of angle region, and then restore the diffusing capacity and obtain the improvement of whole flow field. Finally, the optimization modification can significantly improve the pressure ratio, adiabatic efficiency and surge margin of the 13-stages compressor, while stage matching good, and the off-design performance is obviously better than original type.