直线增程器稳态运行换气过程

doi:10.13229/j.cnki.jdxbgxb20170749

摘要/Abstract

摘要： 通过搭建的MATLAB/Simulink和AVL_Fire相耦合的仿真体系,以扫气效率、捕获率和换气终了时的湍动能等物理量为衡量换气过程品质的指标,在不同的活塞行程、工作频率和进气压力的工况下,探究了直线增程器稳态运行的换气过程。并以一样机为例,试验验证了仿真体系的精确性。结果表明,直线增程器的换气特性对进气压力的变化极为敏感,且加大活塞行程和提高工作频率有利于改善直线增程器的换气品质。

关键词: 动力与机械工程, 直线增程器, 稳态运行, 换气过程, 仿真体系

Abstract: Linear Range-Extender (LRE) is an innovative energy conversion device, which can convert fuel chemical energy into electrical energy. Due to simple structure, multi-fuel flexibility and high power density, LRE can be used as an auxiliary power unit for hybrid vehicles. Simulation structure coupling MATLAB/Simulink model and AVL_Fire model is established. For estimating scavenging process quality, scavenging efficiency, capture ratio and turbulent kinetic energy at the end of scavenging process are selected as the indexes. Under different piston strokes, working frequencies and intake pressures, scavenging process for stable operation of LRE is investigated. The accuracy of the simulation structure is validated by a prototype. Results show that the scavenging characteristics are sensitive to intake pressure. The scavenging quality can be improved by increasing the piston stroke and working frequency.

Key words: power and mechanical engineering, linear range-extender, stable operation, scavenging process, simulation structure

中图分类号:

TK441

臧鹏飞, 王哲, 孙晨乐, 林炼炼. 直线增程器稳态运行换气过程[J]. 吉林大学学报(工学版), 2018, 48(5): 1455-1465.

ZANG Peng-fei, WANG Zhe, SUN Chen-le, LIN Lian-lian. Scavenging process for stable operation of linear range-extende[J]. Journal of Jilin University(Engineering and Technology Edition), 2018, 48(5): 1455-1465.

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