流体机械

2020, v.48;No.580(10) 22-29

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燃料电池用空压机性能设计与参数优化
Performance Design and Parameter Optimization of Air Compressor for Fuel Cell

陈培江;洪伟荣;陈德鑫;
Chen Peijiang;Hong Weirong;Chen Dexin;Energy Engineering Institute,Zhejiang University;

摘要(Abstract):

以110 kW燃料电池系统的离心空压机为研究对象,根据需求设计出离心空压机原型。通过CFD对其性能进行仿真计算,并进行流场分析寻找需要优化的结构参数。在参数优化过程中,对三维模型进行参数化建模,运用Kriging近似模型结合灰狼优化算法,以离心空压机功耗最低为目标,对叶片入口安装角、叶片出口安装角、叶片包角以及叶片型线同时进行优化,寻找最优的参数组合。优化结果表明,优化后的离心空压机在满足额定工况要求的情况下,等熵效率提升了3.89%,功耗降低了5.15%,并且喘振裕度提高了8%;在额定流量附近压缩机在压比有一定提升的情况下,功耗仍有所降低,实现了燃料电池系统净输出功率的提高。该研究成果可为燃料电池车用高性能离心空压机的设计提供理论依据。
In this paper,a centrifugal air compressor was designed for the 110KW fuel cell system.CFD simulations were carried out to analyze its performance and to find related parameters in need of optimization.In order to decrease the power consumption of centrifugal compressor,its blade inlet installation angle,blade outlet installation angle,blade wrap angle and blade profile were optimized on the basis of parametric modeling,using the Kriging approximation model combined with grey wolf optimization algorithm.The results showed that,compared with the conventional design,the optimized centrifugal compressor has an efficiency increase of 3.89%,a power consumption reduction of 5.15%,and a surge margin extend of 8% when the rated operating point meets the requirements.Besides,in the case of a certain increase in the pressure ratio of the compressor near the rated working condition,the power consumption is still reduced,so the net output power of the fuel cell system is improved.This research can provide a reference for the optimal design of high performance centrifugal air compressors for fuel cell vehicles.

关键词(KeyWords): 离心压缩机;参数化;Kriging模型;灰狼算法;功耗
centrifugal compressor;parameterization;kriging model;grey wolf algorithm;consumption

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作者(Authors): 陈培江;洪伟荣;陈德鑫;
Chen Peijiang;Hong Weirong;Chen Dexin;Energy Engineering Institute,Zhejiang University;

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