逆向建模技术在柴油机气道正向开发中的应用  

Application of reverse modeling technology in forward development of diesel engine intake ports

作　　者：付云贵 吕顺 张善永 云峰 王少帅 王宁宁 FU Yungui;LYU Shun;ZHANG Shanyong;YUN Feng;WANG Shaoshuai;WANG Ningning(State Key Laboratory of Engine Reliability,Shandong Weifang 261061,China)

机构地区：[1]内燃机可靠性国家重点实验室,山东潍坊261061

出　　处：《柴油机设计与制造》2022年第1期7-12,共6页Design and Manufacture of Diesel Engine

摘　　要：优化柴油机气道设计可以有效改善柴油机的燃烧性能,对优化排放、降低燃油耗至关重要。为了获得具有一定流量系数和涡流比的气道,以某中型柴油机进气道为研究对象,通过流体仿真对气道进行局部优化,预测了各升程的流量系数和涡流比。通过实物芯盒优化喉口结构和修模芯盒内腔,优化气道设计,应用Geomagic Design X逆向建模软件建立了三维(3D)数模,并将逆向后的数模建立快速验证气道芯盒。结果表明,基于逆向建模技术的气道正向开发可以实现气道的精确设计,对于优化气道设计、提高柴油机性能具有重要作用。The development of the intake ports optimization can effectively improve the combustion performance of diesel engine,which is very important to optimize emissions and reduce fuel consumption.In order to obtain the intake ports with certain flow coefficient and eddy current ratio,based on the intake ports of a medium⁃sized diesel engine as the research object,the local optimization of the inlet was carried out through fluid simulation,and the flow coefficient and eddy current ratio of each lift were predicted.The structure of the throat was optimized through the physical core box,and the inner cavity of the core box was repaired to obtain the final shaped intake ports.After solidifying the shaped intake ports,the three⁃dimensional(3D)digital model was established by reverse modeling software of Geomagic Design X.Finally,the reverse model is used to establish the fast validation of the core box.The development results shows that the forward development of the intake ports based on the reverse modeling tech⁃nology can realize the precise design of the intake ports,play an important role in meeting the demand of intake ports performance improvement and improving the performance of diesel engines.

关 键 词：柴油机气道 燃烧性能 流量系数 涡流比 气道开发 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]