摘要
以某燃气轮机离心压气机为研究对象,对轴向斜缝式处理机匣和实壁机匣进行对比试验研究。试验结果表明:处理机匣扩展了压气机的稳定裕度,但效率有所降低。为探究机匣处理的扩稳机理,进行了压气机流场分析及数值模拟计算。计算结果表明:轴向斜缝式机匣处理明显改善了离心叶轮尖部流场,提高了压气机的稳定裕度,同时,机匣处理带来了更多二次流损失,导致压气机效率下降。
Casing with axial skewed slots and solid casing were experimentally investigated for a centrifugal compressor. The experi- mental results show that casing treatment increases the stable operation range and reduces the efficiency. For exploring the mechanism of casing treatment which as an effective way to increase the compressor stable operation range, a simulation and flow field analysis for the centrifugal compressor were performed. The computational results show that this casing treatment with axial skewed slots can im- prove flow field in the tip of the centrifugal impeller blades, so the stability of the compressor enhanced. Casing treatment brings more secondary flow loss, so the efficiency of the centrifugal compressor declined.
出处
《燃气轮机技术》
2015年第2期34-38,共5页
Gas Turbine Technology
基金
国家国际科技合作专项(编号2015DFR70590)
关键词
离心压气机
机匣处理
轴向斜缝
数值模拟
扩稳机理
试验研究
失速裕度
centrifugal compressor
casing treatment
axial skewed slot
numerical simulation
mechanism of stall margin improvement
experimental study
stall margin
作者简介
杨家礼（1963-），男，湖南常德人，本科，高级工程师，主要从事燃气轮机叶片机研究，E—mail：yangjiali608@163．com。
