摘要
压气机负荷能力不断提升导致角区流动愈加复杂并易于分离,如何组织与控制角区流动已成为压气机负荷最大化设计过程中的一个关键问题。本文首先针对一高压比离心叶轮开展数值模拟校核工作,在对比分析的基础上,确定中心差分与SST湍流模型组合模拟性能较佳。而后对一跨声速离心压气机级原型进行了性能分析并分别施加常规工程倒圆和叶身/端壁融合(BBEW)技术修型,对比分析其对气动性能影响,发现常规工程倒圆会使叶轮性能恶化,而BBEW能在存在工程倒圆的基础上提升绝热效率近0.4个百分点。本文最后对各方案的流场细节进行了分析和对比.
It has become a key problem in the design process of compressor load maximization design that how to organize and control corner flow in the premise of that the continuous improvement of compressor load ability leads to corner flow more complicatedly and separation more easily. Firstly the article determined the better performance of the center difference and SST turbulence model combination simulation of a centrifugal impeller with high pressure ratio in the basis of carrying out different numerical comparison and analysis. And then the conventional engineering fillets and several kinds of blended blade and endwalls were used to redesign the impeller. It has found that conventional engineering fillet could deteriorate the performance of the impeller and BBEW could improve the adiabatic efficiency nearly 0.4%. Finally, the article analysis and compares the scheme of the flow field details.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2014年第2期256-261,共6页
Journal of Engineering Thermophysics
基金
国家自然科学基金项目资助(No.51006100
No.51176012)
关键词
离心压气机
前缘
角区
倒圆
叶身
端壁融合
centrifugal compressor
leading edge
corner flow
fillet
blended blade and endwall technique （BBEW）
