有叶扩压器的流场分析  

INVESTIGATION ANALYSIS ON VANED DIFFUSERS

作　　者：杜建一[1] 李雪松[1] 初雷哲[1] 赵晓路[1] 徐建中[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080

出　　处：《工程热物理学报》2005年第1期43-46,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50476085)国家863计划资助项目(No.2002AA503020)

摘　　要：本文利用计算流体力学通用软件了进行离心压气机扩压器的初步设计工作.参照有关文献[1～8]中的设计公式,本文进行了以下几种扩压器的几何造型和数值计算:(1)双圆弧中心线机翼型叶片扩压器;(2)楔形扩压器;(3)用优化程序设计的扩压器,给出了各扩压器造型在给定边界条件下流场的马赫数、静压、总压的分布,计算出各扩压器造型的静压比和总压恢复系数.最后对设计的扩压器与叶轮一起连算,以取得更接近实际情况的计算结果.通过对计算结果进行的分析比较,得到了离心压气机扩压器设计中有价值的初步性结果,为进一步的设计提供了改进途径和相应的基础数据.The primary design about the diffusers of centrifugal compressor is carried out using general CFD software. The geometry design and computational simulation of various diffusers are achieved by using design formulae in correlative references. These interrelated diffusers are given as follows: (1) aerofoil vane diffuser; (2) wedge-shaped diffuser; (3) the diffuser using optimizing method. The distributions of Mach numbers, static pressure and total pressure are obtained for the above-mentioned diffusers in certain boundary conditions. The static pressure ratio and the total recovery coefficient of these diffusers are also achieved. Finally, a computation linked impeller and diffuser is finished for making computational results be close to practical results. Through a series of analysis and comparison to the computational results, the valuable conclusions about centrifugal compressor diffuser are achieved. All of these may provided with some improved methods and based data in the farther design.

关 键 词：微型燃气轮机 扩压器 数值模拟 

分 类 号：TK474[动力工程及工程热物理—动力机械及工程]