两级相继增压柴油机性能仿真研究  

Performance Simulation of Two-stage Sequential Turbocharged Diesel Engine

作　　者：贺添祺 王银燕[1] 王贺春[1] 杨传雷[1] 袁帅 HE Tian-qi;WANG Yin-yan;WANG He-chun;YANG Chuan-lei;YUAN Shuai(College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,哈尔滨150001

出　　处：《内燃机与配件》2020年第3期35-39,共5页Internal Combustion Engine & Parts

摘　　要：两级相继增压技术结合了两级增压技术和相继增压技术,在提高原机单级增压比的同时,拓宽了工作流量的匹配范围,本文基于GTPOWER软件搭建一维模型并与SIMULINK软件进行耦合,以一台船用高速柴油机作为研究对象,将原机单级增压系统改装为两级相继增压系统,对其推进特性与万有特性进行稳态仿真计算,并与原机的实验结果进行限制条件的对比。结果表明,两级相继增压在推进与万有特性模式下,相对于原机时,燃油消耗率均有所下降,最高爆发压力均有所提高,NOX排放量增加,Soot排放量降低。除此之外,本文还对该柴油机进行了瞬态仿真计算,对1TC与2TC切换时空气阀与燃气阀之间的开关时刻进行了比较和分析,得到了较为合理的开关延迟时刻。Two-stage sequential turbocharging technology combines two-stage turbocharging technology and sequential turbocharging technology, which improves the single-stage turbocharging ratio of the engine and widens the matching range of workflow. This paper builds a one-dimensional model based on GTPOWER software and couples it with SIMULINK software. Taking a high-speed marine diesel engine as the research object, the original single-stage turbocharging system is modified to two-stage sequential turbocharging system. The steadystate simulation calculation of the propulsion and universal characteristics of the pressure system is carried out, and the limitation conditions are compared with the experimental results of the original machine. The results show that the fuel consumption rate decreases, the maximum explosion pressure increases, the NOXemission increases and the Soot emission decreases compared with the original engine under the propulsion and universal characteristics mode. In addition, the transient simulation calculation of the diesel engine is carried out, and the switching time between air valve and gas valve is compared and analyzed when 1 TC and 2 TC are switched, and a more scientific switching delay time is obtained.

关 键 词：柴油机 万有特性 两级相继增压 空气阀 推进特性 延迟时刻 切换边界 燃气阀 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]