某高增压比离心压气机流场的数值计算  

Numerical Calculation of Flow Field in a High Boost-tario Centrifugal Compressor

作　　者：田浩男[1] 沈伟[1] 李昂 张宇坤 TIAN Haonan;SHEN Wei;LI Ang;ZHANG Yukun(Naval Aeronautical and Astronautical University,Yantai 264001)

机构地区：[1]海军航空工程学院,烟台264001

出　　处：《计算机与数字工程》2018年第9期1713-1716,1801,共5页Computer & Digital Engineering

摘　　要：某型离心压气机采用了单级离心叶轮增压的设计方案,设计转速下增压比达到了8,同时工作效率很高。为分析该型离心压气机的设计优缺点,利用CFX软件对该型离心压气机在设计工况下的流场进行了仿真。分析结果表明,该型离心压气机的部件设计比较合理。叶轮对气流的做功能力很强,在设计工况下几乎不存在气流分离现象;对于叶轮后超音速气流,采用梭型直叶片的第一级静子能够成功抑制气流的分离现象,能够顺利完成扩压减速的过程;第二级静子叶片的弯扭程度较大,能够使气流在进一步扩压减速后沿轴向流进后面的燃烧室,为充分稳定的燃烧提供良好的基础。A centrifugal compressor uses a single-stage centrifugal impeller design,while the boost ratio reaches 8 and efficiency is high under the design speed. In order to analyze the advantages and disadvantages of the design of the compressor,the flow field at the design point of the compressor is simulated by CFX software. The results show that the design of the compressor is reasonable. The impeller has a strong ability to work on the air flow,and there is no airflow separation at the design point. For the supersonic airflow of the impeller,the first stage stator of the straight blade of the shuttle can successfully suppress the separation of the airflow and can successfully complete the process of decompression and deceleration. The second stage stator blades have a greater degree of bending and torsion,the airflow is allowed to flow into the rear combustion chamber along the axial direction after further expansion and deceleration,a good foundation is provided for fully stable combustion.

关 键 词：离心压气机 流场 CFD 数值模拟 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]