Original scientific paper

https://doi.org/10.17818/NM/2020/2.2

Modelling and Experimental Validation of a VNT Turbocharger for Improving Performances of a Marine Diesel Generator Engine

Nguyen Quang Vinh orcid.org/0000-0002-4684-890X ; Ho Chi Minh City University of Transport Viet Nam
Bui Hong Duong ; Ho Chi Minh City University of Transport Viet Nam
Le Van Vang ; Ho Chi Minh City University of Transport Viet Nam

Abstract

This paper presents modelling and experimental validation for improving the performances of a marine diesel generator engine. Based on the diesel engine theory, the laws of conservation of energy, and the principle of movement of flow through turbocharger nozzle, a mathematical model of a real turbocharged engine was built, concentrating on the mathematic model of flow through nozzles. This model is simulated by Matlab/Simulink program, the results of simulation showed the relationships between the engine and the turbocharger, the turbine and the compressor, and between the nozzles and the turbocharger. The experiments were carried out to validate this model, the errors between the simulation and measure were acceptable. The measure and simulation results also determined that at the low load conditions (≤50% load) engine performances can be improved by adjusting nozzle opening degree (from fully opening to 90% and 80% opening).

Keywords

variable nozzle turbine; turbocharger; engine performance; diesel generator engine

Hrčak ID:

238050

URI

https://hrcak.srce.hr/238050

Publication date:

18.5.2020.

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