船用发动机轴流式电辅助涡轮增压器的探索研究

Exploratory Development on Axial Electric Auxiliary Turbocharger in Marine Engine

关键词:  电辅助涡轮增压器  轴对称端壁  叶尖小翼  压气机转子  优化设计

Key words:  Electric auxiliary turbocharger  Axisymmetric endwall  Winglets  Compressor rotor  Optimum design

摘要:

为了解决由于降速航行所导致的废气涡轮增压器不能正常工作的问题，船舶发动机通常采用辅助鼓风机来进行补充扫气，以提升船舶在低速状态下的操纵性并降低排放。回顾了电辅助涡轮增压器的研究情况，总结了研究团队在船用发动机轴流式电辅助涡轮增压器方面开展的一系列探索研究和优化设计工作。从控制间隙流动，进一步提高增压器性能的角度出发，探究了轴对称端壁及叶尖小翼对电辅助涡轮增压器气动性能的影响及其作用机制。最后，讨论了船用发动机轴流式电辅助涡轮增压器在未来研究中存在的问题和挑战。

Abstract:

In order to solve the problem that the exhaust gas turbocharger cannot work normally due to the navigation at reduced speed， the marine main engine usually adopt auxiliary blower to conduct supplementary scavenging to improve the manoeuvrability of the ship at reduced speed and reduce the emission. This paper firstly reviewed the research situation of electric auxiliary turbocharger， and then introduced in detail a series of group research work on axial electric auxiliary turbocharger. The performance parameters and flow characteristics of the prototype electric auxiliary turbocharger were introduced respectively. From the perspective of controlling clearance flow and further exploiting potentialities of the prototype， the effects of axisymmetric endwall and partial winglets on the performance of electrically assisted turbocharger and its mechanism were investigated. Finally， the problems and challenges of the axial electric auxiliary turbocharger were listed， and the following research plan and future development were prospected.