四气门柴油机进气道流动特性仿真研究  

Research on Simulation of Intake Port Flow Characteristics in a Four-valve Diesel Engine

作　　者：段敏[1] 葛鑫[1] 于海洋[1] 

机构地区：[1]辽宁工业大学汽车与交通工程学院,辽宁锦州121001

出　　处：《辽宁工业大学学报（自然科学版）》2015年第3期177-181,共5页Journal of Liaoning University of Technology(Natural Science Edition)

基　　金：国家科技支撑计划(2012BAF12B08)

摘　　要：为了提高某四气门柴油机进气道的性能,应用AVL-FIRE软件分别对气门升程为2、4、6、8、10 mm5个不同工况下的流场进行数值模拟。研究表明气道性能评价参数(涡流比和流量系数)的模拟结果与稳流试验测得的数据吻合良好,在保证涡流比大小满足发动机综合性能的前提下,通过分析气道内部流场,对气道结构局部设计不合理的地方进行优化,从而使流量系数值进一步提高。In order to improve the performance of the intake port for a four-valve diesel engine, flow fields are simulated respectively under five different working conditions by means of AVL FIRE software, which is the valve lifts including 2, 4, 6, 8 and 10 mm. The research shows that the calculation of the performance evaluation parameters （swirl ratio and the flow coefficient） of the intake port coincides well with the test results of steady flow. Under the premise of swirl ratio which meet the comprehensive performance of diesel engine, we can optimize the unreasonable places of intake port’s structure through analyzing of internal flow field, so that the discharge coefficient of intake port can be further improved.

关 键 词：四气门柴油机 进气道 流量系数 涡流比 CFD 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]