哈尔滨工程大学学报2025，Vol.46Issue(5)：868-875,1031,9.DOI:10.11990/jheu.202304031
变马赫数下凹坑结构对高负荷扩压叶栅性能的影响研究
An investigation of the effect of dimple structures on the performance of high-load compressor cascades at different Mach numbers
摘要
Abstract
In order to investigate the influence of dimple shape on the aerodynamic performance of high-load compressor cascade,this paper employs a numerical simulation to examine how spherical and ellipsoidal pits,oriented along the axi-al and spanwise long axis,affect the aerodynamic performance of the high-load compressor cascade NACA65-K48.The study focuses on conditions at the design attack angle and Mach numbers,Ma,ranging from 0.5 to 0.8.Pits of different shapes are arranged between 10%to 32%of the chord length,with a spanwise interval of 5 mm.By comparing the per-formance parameters and flow field structures of cascades with different pit configurations at different Mach numbers,the study reveals that the presence of pits enhances turbulent kinetic energy near the wall,improving the fluid′s anti-separa-tion ability.This results in reduced total pressure loss and weakens the separation of isolated bubbles from corner areas on the suction surface across all three pit structures.However,the increased boundary layer thickness and three-dimen-sional flow effects increase the wake loss of all concave cascades.The spherical dimple performs the best at the design Mach number,reducing total pressure loss by 6.48%.Meanwhile,the ellipsoidal dimple extending to the long axis a-chieves a 10.23%reduction in total pressure loss coefficient at Mach 0.8.关键词
高负荷扩压叶栅/球形凹坑/椭球形凹坑/流动损失/转捩/角区分离/气动性能/漩涡结构Key words
high-load compressor cascade/spherical pit/ellipsoidal pit/flow loss/transition/corner separation/aerodynamic performance/vortex structure引用本文复制引用
陆华伟,史远鹏,孔晓治,王龙,辛建池..变马赫数下凹坑结构对高负荷扩压叶栅性能的影响研究[J].哈尔滨工程大学学报,2025,46(5):868-875,1031,9.基金项目
国家自然科学基金面上项目(52176026) （52176026）
国家自然科学基金青年项目(52006021). （52006021）
