向心透平导向叶栅的结构优化  

The Structural Optimization of Guide Vane of Radial-Inward-Flow Turbine

作　　者：魏新利[1] 邱志明[1] 马新灵[1] 王慧[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2014年第1期46-50,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省科技攻关计划资助项目(122102210041);河南省教育厅科学技术研究重点项目(13A480722)

摘　　要：以R245fa为工质,采用计算流体动力学(CFD)软件FLUENT,运用标准k-ε模型,对叶片数分别为15,17,19,21,23,25,27,叶片安装角分别为24°,28°,32°,36°,40°的导向叶栅进行了数值研究.计算结果显示,当叶片数为21,安装角为28°时,导向叶栅的出口周向平均速度、出口平均温度、速度系数等与原设计相比均有了很大的改善.在此叶片数和安装角下,采用线性拟合得到了满足设计流量所需的叶高.研究表明优化后流道内流动情况良好,为高效导向叶栅的设计提供了参考.we propose in this paper an approach to aggregating partially ordered preferences with belief degrees for decision making. We consider a set of preferences associated with belief degrees, and treat each preference as a sequence with belief degree. For every pair of considered alternatives, we calculate the probability that one alternative should be placed before another. These probabilities are then fed to the ORDER-BY-PREFER- ENCE algorithm to generate an approximately optimal total order over all the alternatives. A simple example is given to illustrate this approach.

关 键 词：向心透平 导向叶栅 二次流 优化 

分 类 号：TK14[动力工程及工程热物理—热能工程]