A comparative evaluation of thermodynamic performance of a single-cylinder linear engine and conventional engine

Case Studies in Thermal Engineering

Yuan Jing¹  Chenheng Yuan²  Shan Zeng² 

[1] Transportation, Chongqing Jiaotong University, Chongqing, 400074, China;;College of Traffic &

关键词: Single-cylinder linear engine;    Conventional crank engine;    Gas exchange;    Combustion;   

DOI  :  

来源: DOAJ

【 摘 要 】

Linear engine has been presented as a potential substitute for conventional crank engine (CCE). This paper proposes a multi-dimensional thermodynamic model which couples piston motion, scavenging and combustion to reveal the thermodynamic performance of a single-cylinder linear engine (SCLE) by comparing a CCE. The results indicate that the SCLE provides longer gas exchange duration for exhaust cleaning, and it has a shorter residence time near top dead center for combustion. As a result, the SCLE shows higher scavenging efficiency and more complete exhaust, although the longer gas exchange duration of the SCLE also has a negative impact on the trapping efficiency. Moreover, it also finds that the SCLE operates with a lower combustion efficiency and longer combustion duration than the CCE due to its faster motion around top dead center. Therefore, the thermal efficiency of SCLE is lower.

【 授权许可】

Unknown