摘要
为了研究非轴对称静叶应用于风扇/压气机中提高畸变条件下工作性能的可行性,本文对轴对称风扇和非轴对称风扇开展了非定常数值研究,获得了两型风扇在均匀进口和畸变进口条件下的特性曲线,并对两型风扇在畸变条件下的流场进行了对比和分析,结果表明:畸变条件下,非轴对称风扇在设计点处的效率和流量相对轴对称风扇有很大提升,而压比下降很小;非轴对称静叶可以抑制畸变区静叶角区分离,同时可以降低动叶非畸变区激波强度;在畸变流体影响的流道内,采用非轴对称静叶可使低能流体沿径向迁移并被主流吹出流道,从而使分离区减小。
Time-accurate simulations were performed to study the feasibility of the use of nonsymmetrical stator in a fan with distorted inlet.The performance characteristic of the fans with clean inlet and distorted inlet were obtained,and the unsteady flow fields were compared and analyzed.Results indicate that the efficiency and mass flow rate of non-symmetrical fan is higher at the design point than that of the symmetrical fan,but the pressure ratio decreases a little.Corner separation in the distorted region is restrained in the hub bowed vane area,and the shock wave intensity in non-distorted region in the rotor is weakened.In the distorted region,the low energy fluid rapidly migrate along radial direction driven by the radial component of the blade force and blew out of the passages.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2015年第6期1207-1212,共6页
Journal of Engineering Thermophysics
基金
国家自然科学基金重点项目(No.51436002)
国家自然科学基金青年基金项目(No.51006014)
中央高校基本科研业务费专项资金资助(No.3132014048)
关键词
非轴对称
畸变
风扇
数值模拟
非定常
non-symmetry
distortion
fan
numerical simulation
unsteady
