Effect of Circuit Geometry on Steady Flow Performance of an Automotive Turbocharger Compressor
详细信息 查看全文
- 作者：Silvia Marelli ; silvia.marelli@unige.it ; Chiara Carraro ; Simone Moggia ; Massimo Capobianco
- 关键词：Turbocharging ; centrifugal compressor ; internal combustion engine ; surge ; unstable zone ; experimental
- 刊名：Energy Procedia
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：101
- 期：Complete
- 页码：630-637
- 全文大小：564 K
- 卷排序：101
文摘
Downsizing and turbocharging are today considered an effective way to reduce CO2 emissions in automotive gasoline engines. To this aim, a deep knowledge of turbocharger behavior could be a key solution to improve the engine-turbocharger matching calculation. The influence of the intake system geometry on the surge line position is an important aspect to guide the project of the intake manifold, enlarging the compressor stable zone. This aspect has a considerable impact on engine performance, especially during transient operation. A wide experimental investigation was carried out at the turbocharger test facility of the University of Genoa on a small turbocharger compressor. Compressor characteristic curves measured considering an automotive intake circuit are compared with standard maps provided by turbocharger's manufacturer. This information allows the optimization of 1D model implementing more realistic maps of compressor. The influence of three different layouts has been investigated varying overall circuit volume and length, keeping values in a range compatible with passenger cars packaging constraints. In the paper, the main results of the experimental campaign are presented taking into account the influence of geometry variations on compressor map and surge line position.