高负荷轴流式电辅助增压器的初步设计与性能研究
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摘要
为解决增压发动机涡轮迟滞效应所带来的环境和操纵性问题,从实际使用角度出发,参考国内外的设计技术标准,采用轴流压气机的形式,为大功率发动机设计了一款在设计工况点流量为0.53 kg/s、总压比为1.3、等熵效率为86.95%的电辅助增压器.通过全三维数值模拟方法,对电辅助增压器的性能进行计算,得到流场细节和设计转速下的性能曲线,并对设计工况点和近失速工况点的流动状态和造成流动损失的原因进行分析.
In order to solve the environmental and maneuverability problems caused by turbocharged engine turbo-hysteresis effect, an electrical assisted turbocharger with flow rate of 0.53 kg/s at design point, total pressure ratio of 1.3 and isentropic efficiency of 86.95% was designed for high-power engine in the form of an axial-flow compressor referring to the design technical standards at home and abroad. The performance of the electro-assisted turbocharger was calculated by full three-dimensional numerical simulation method, and the flow field details and the performance curve at the design speed were obtained, and the flow state at the design point and near stall point, in addition the cause of flow loss were analyzed.
In order to solve the environmental and maneuverability problems caused by turbocharged engine turbo-hysteresis effect, an electrical assisted turbocharger with flow rate of 0.53 kg/s at design point, total pressure ratio of 1.3 and isentropic efficiency of 86.95% was designed for high-power engine in the form of an axial-flow compressor referring to the design technical standards at home and abroad. The performance of the electro-assisted turbocharger was calculated by full three-dimensional numerical simulation method, and the flow field details and the performance curve at the design speed were obtained, and the flow state at the design point and near stall point, in addition the cause of flow loss were analyzed.
引文
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[2] BAILEY M,TOLBERT L,DOMINGO-ORNL N.Electrically-assisted turbocharger development for performance and emissions[C]// 6th Diesel Engine Emissions Reduction (DEER) Workshop,2000.
[3] ARNOLD S,BALIS C,BARTHELET P,et al.Garrett electric boosting systems (EBS) program[R],2005.
[4] REITH U.Tubocharged-internal combustion engine e.g.drive motor,for use in e.g.passenger car,has additional device with external compressor driven by engine,and pressure reservoir is connected with external compressor over pressure pipe:DE102006027865[P].2007-12-20.
[5] KNIRSCH D I S,WEISS D I U,ZüLCH D I S,et al.Electric supercharging in the Audi RS 5 TDI concept[J].MTZ Worldwide,2015,76(1):14-19.
[6] ROTHGANG D I S,PACHMANN D I M,NIGRIN D I S,et al.The electric supercharger challenge,conception and implementation[J].Auto Tech Review,2015,76(9):4-9.
[7] 韩伟强.电辅助增压器降低增压柴油机瞬态烟度研究[D].天津:天津大学,2012.HAN W Q.Researches on reducing transient smoke emissions of the turbocharged diesel engine with an electric supercharger[D].Tianjin:Tianjin University,2012.(in Chinese)
[8] 姚春德,杨建军,徐元利,等.电动增压补气消除柴油机瞬态加速冒烟的试验[J].环境科学学报,2008,28(11):2161-2166.YAO C D,YANG J J,XU Y L,et al.Use of an electric supercharger to reduce black smoke emission from a diesel engine[J]Acta Science Circumstantiae,2008,28(11):2161-2166.(in Chinese)
[9]姚春德,周红秀.柴油机加速过程快速补气的电辅助增压器设计及其特性[J].机械工程学报,2006,42(6):184-187.YAO C D,ZHOU H X.Design and characteristics on electric supercharger for diesel engine acceleration by additional air rapid injection[J]Journal of Mechanical Engineering,2006,42(6):184-187.(in Chinese)
[10]姚春德,韩伟强,徐广兰,等.电辅助增压器对废气涡轮增压器影响的试验研究[J].机械工程学报,2012,48(8):188-193.YAO C D,HAN W Q,XU G L,et al.Research and experimental studies on the influence on turbocharger by electric supercharger[J]Journal of Mechanical Engineering,2012,48(8):188-193.(in Chinese)
[11] 赵付舟.车用发动机混合涡轮增压系统的研究[D].南京:南京理工大学,2010.ZHAO F Z.Study on the hybrid turbocharging system in a vehicle engine[D].Nanjing:Nanjing University of Science and Technology,2010.(in Chinese)
[12] 刘张飞.电辅助涡轮增压器转子动力学特性研究[D].北京:北京理工大学,2015.LIU Z F.Study of rotor dynamic performance for electric assisted turbocharger[D].Beijing:Beijing Institute of Technology,2015.(in Chinese)
[13] 吴星.电动增压系统的设计及其对增压柴油机低速工况性能影响的研究[D].福州:福州大学,2016.WU X.Electric supercharging system design and the research on the effects of turbocharged diesel engine working condition of low speed performance[D].Fuzhou:Fuzhou University,2016.(in Chinese)
[14] 李由.电辅助涡轮增压柴油机气路系统建模与控制[D].吉林:吉林大学,2017.LI Y.Air system modeling and control of electrically assisted turbocharged diesel engine[D].Jilin:Jilin University,2017.(in Chinese)
[15] 赵永生,张虹,王绍卿.车用电辅助涡轮增压技术发展[J].车辆与动力技术,2010(2):54-57.ZHAO Y S,ZHANG H,WANG S Q.Technological development of vehicle electric assisted turbocharger[J].Vehicle & Power Technology,2010(2):54-57.(in Chinese)