An Integrated Turbocharger Matching Program for Internal ‎Combustion Engines

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Mousavi S.; Nejat A.; Alaviyoun S. S.; Nejat M.

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Journal Paper

Paper Information

Journal: JOURNAL OF APPLIED FLUID MECHANICS (JAFM) Year:2021 | Volume:14 | Issue:4 Page(s): 1209-1222

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Information Journal Paper

Title

An Integrated Turbocharger Matching Program for Internal ‎Combustion Engines

Author(s)

Mousavi S. | Nejat A. | Alaviyoun S. S. | Nejat M. | Issue Writer Certificate

Keywords

Internal combustion engineQ4

Turbocharger matchingQ4

Engine ‎performance simulationQ4

ZeroQ4

dimensional simulationQ4

Engine downsizing‎Q4

Abstract

Following the global environmental concerns, many automobile manufacturers intend to produce smaller ‎engines, aiming to lower emissions and fuel consumption. As compensation for performance reduction, these ‎engines are equipped with turbochargers. One of the challenges is to select the right turbocharger for a specific ‎engine. In this regard, an integrated Zero-dimensional turbocharger and engine simulation program is ‎developed, employing a quasi-steady compressible flow method. The program gives the designer the ‎possibility of observing the performance of different compressor-turbine combinations on an internal ‎combustion engine. Engine details such as fuel, cylinder geometry, heat transfer conditions, valve timing, and ‎spark timing are considered within the engine modeling, and the designer can investigate their effects on the ‎overall performance of the system. Compressor and turbine performances are predicted by their previously ‎provided performance maps (steady-state characteristic curves) and special inter-and extrapolation methods. ‎A new algorithm for Turbocharger matching is suggested, and its logics, basic convergence loops, and ‎thermodynamic equations have been described in detail. A database containing digitized compressor and ‎turbine maps and details provided by different manufacturers is created and integrated into the program. An ‎existing turbocharged engine has been tested and also simulated by the program. The accuracy of the program ‎results is evaluated by comparing them with experimental results. The maximum error of modeling the engine ‎and the whole simulation is 1. 5% and 16%, respectively. Two other compressor-turbine combinations have ‎been evaluated using the program, one of which is suggested as an alternative‎‎.

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