摘要
为了探索自循环机匣处理扩稳机理,利用全三维数值模拟方法对应用机匣处理的LSCC(低速离心叶轮)进行了详细研究。结果表明:自循环机匣处理能有效的延迟失速的发生并在近失速区域略微提高压气机的效率以及总压比。该机匣处理能有效地减小叶顶载荷,从而降低泄漏流相对速度,抑制间隙泄漏涡在叶顶通道内的发展以减小低速气流在流道内的阻塞,提高转子通道的通流能力,从而达到扩大稳定工作范围的目的,综合稳定裕度改进量为12.57%。
To explore the mechanism governing the stability enhancement of the self circulation casing treatment,the authors have conducted a detailed study of a low speed centrifugal compressor(LSCC) in which a casing treatment was applied by using a full-three-dimensional numerical simulation.It has been found that the self circulation casing treatment can effectively delay the occurrence of a stall and slightly enhance the efficiency of the compressor and total pressure ratio in zones nearing the stall region.The casing treatment can efficiently lower the blade tip loads,thus decreasing the relative speed of the leakage flow,prohibiting the development of the leakage flow vortices in the clearances of the blade tip passages,reducing the jam of the low speed flow in the passages,enhancing the flow capacity of the passages of the rotor and achieving the aim to enlarge the stable operation range.The comprehensive stability margin can increase by 12.57%.
出处
《热能动力工程》
CAS
CSCD
北大核心
2012年第6期649-654,733-734,共6页
Journal of Engineering for Thermal Energy and Power
基金
2010年度高等学校博士学科点(博导类)专项科研基金资助项目(20106102110023)
国家自然科学基金资助项目(51006084)
陕西省自然科学基金资助项目(2011JQ7018)
关键词
离心叶轮
失速裕度
自循环
机匣处理
稳定裕度
centrifugal impeller,stall margin,self circulation,casing treatment,stability margin
