摘要
本文实验研究了采用直、弯静叶的某重复级低速压气机在不同时序位置时的总性能及横截面流场特性。在不同流量工况下对压气机整体性能及流场进行了详细测量。结果表明,采用正弯静叶的压气机时序效应相对较弱且喘振裕度有所增加;同时,在压比略有减小的前提下(0.1%级别),凭借消耗扭轴功的大幅下降(3%左右),效率在设计工况下最大可提高约1%。设计工况下,压气机静叶流道内存在两个主要的旋涡结构,分别为刮削涡和上通道涡。直静叶流道中的刮削涡尺度明显大于正弯静叶流道中,受前级静叶尾迹干涉影响较大,体现了更强的时序效应;近堵塞工况下,直静叶中刮削涡尺度明显增大而正弯静叶中基本不变;近失速工况下分离严重,旋涡随之消失。
Experimental investigation was done in a double stages low speed axial compressor with both straight and bowed stators.Overall performance and traverse flow field were measured in different work condition.The results show that the clocking effect weakens and the stall margin increases while the bowed stator is used.Although the total pressure ratio decreases about 0.1%, the efficiency raises about 1%with the reason of torque input decreasing（about 3%）.At the design condition,there are two vortexes exist in stator passage.They are passage vortex at up side and scraping vortex near hub tip.These two vortexes in straight stator passage are bigger than in bowed stator passage.So they are influenced more obviously in straight stator passage than in bowed stator passage.And get more intensive clocking effect.At near chocking condition,these two vortexes enhance obviously in straight stator passage but a little in bowed stator passage.At near stall conditions,the serious separation makes the vortexes disappear.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2011年第1期33-38,共6页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50646021)
关键词
压气机
时序效应
正弯静叶
旋涡结构
尾迹干涉
compressor
clocking effect
positive bowed stator
vortex structure
wake interference
