为改善某8缸船用柴油机全工况性能，设计了带有定压排气管的3增压器相继增压系统，利用GT-POWER对相继增压发动机进行了控制策略分析。结果表明：设计的方案可以使发动机50%以下转速工况，比油耗降低8.1～13.4 g/kW·h，最大扭矩可以提升80.0%～113.4%。；在发动机60%～70%转速工况下，比油耗降低2.0～5.4 g/kW·h，最大扭矩可以提升8.4%-30.0%；通过发动机定压排气管的设计代替脉冲排气管，可以使发动机高工况下性能也有所改善，为相继增压系统改善发动机全工况性能提供一种新的思路。
In order to improve the performance of an 8-cylinder marine diesel engine under full operating conditions, a 3-turbocharger sequential turbocharging system (STS) with a constant pressure exhaust pipe was designed. The control strategy analysis of the STS engine were carried out by GT-POWER. The results show that the designed system can reduce the specific fuel consumption by 8.1～13.4 g/kw.h and increase the maximum torque by 80.0%～113.4% under the engine condition with rotating speed below 50%. Under 60%～70% engine speed conditions, the specific fuel consumption is reduced by 2.0～5.4 g/kw.h, and the maximum torque can be increased by 8.4%～30.0%. By using the constant pressure exhaust pipe, the performance of the engine can be improved under high working conditions. The designed system provides a new idea for improving the full condition performance of the engine.
2020,42(5): 159-165 收稿日期：2019-05-09
DOI：10.3404/j.issn.1672-7649.2020.05.030
分类号：TK423.5
基金项目：中央高校基本科研业务费专项资金资助项目(3132019330)
作者简介：马超(1985-),男,讲师,主要研究方向为船用内燃机先进增压技术
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