摘要
利用商用计算流体力学软件包NUMECA FINE/TURBO对Krain叶轮内部三维粘性流场进行了数值模拟研究。重点分析了分流叶片不同周向位置对该叶轮内部流动和性能的影响,得出了不同周向位置时的叶轮效率、压比随质量流量变化关系,结合对叶轮内部流场的详细分析,给出了适合此半开式离心叶轮分流叶片周向位置的最佳设计方案。研究结果表明:分流叶片不同周向位置对叶轮流道流场影响明显,当偏向主叶片吸力面一侧时可以有效提高叶轮效率。
The three-dimensional viscous internal flow was numerically simulated by using of CFD software package NUMECA FINE / TURBO for analyzing the Krain impeller.Emphasis was focused on the effect of the splitter blade circumferential position on the internal flow and the performance of centrifugal impeller.Then the performance curves of efficiency and pressure ratio varying as mass flow rate at different circumferential position was obtained.And after the detailed analysis the internal flow,a suitable design scheme of the splitter blade circumferential position was put forward.The numerical results showed that the flow field performance was evidently influenced by different circumferential position.Moreover the study also found it could obviously rises up the impeller＇s efficiency,only when the splitter blade was leaned to the suction surface of the main blade along the circumferential direction.
出处
《流体机械》
CSCD
北大核心
2011年第9期16-20,44,共6页
Fluid Machinery
基金
2010年度高等学校博士学科点(博导类)专项科研基金(20106102110023)
关键词
高速离心叶轮
分流叶片
数值分析
周向位置
high-speed centrifugal impeller
splitter blade
numerical analysis
circumferential position
