Influence of Injector Location on Part-Load Performance Characteristics of Natural Gas Direct-Injection in a Spark Ignition Engine

2016 ◽  
Vol 9 (4) ◽  
pp. 2262-2271 ◽  
Author(s):  
James Sevik ◽  
Michael Pamminger ◽  
Thomas Wallner ◽  
Riccardo Scarcelli ◽  
Brad Boyer ◽  
...  
Keyword(s):  
Natural Gas ◽  
Direct Injection ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Performance Characteristics ◽  
Part Load

scholarly journals Numerical investigation of natural gas direct injection properties and mixture formation in a spark ignition engine

2014 ◽  
Vol 18 (1) ◽  
pp. 39-52
Author(s):  
Bijan Yadollahi ◽  
Masoud Boroomand
Keyword(s):  
Numerical Model ◽  
Natural Gas ◽  
Internal Combustion Engines ◽  
Gasoline Engine ◽  
Direct Injection ◽  
Spark Ignition ◽  
Computational Effort ◽  
Spark Ignition Engine ◽  
Validity Of Results ◽  
Injection Process

In this study, a numerical model has been developed in AVL FIRE software to perform investigation of Direct Natural Gas Injection into the cylinder of Spark Ignition Internal Combustion Engines. In this regard two main parts have been taken into consideration, aiming to convert an MPFI gasoline engine to direct injection NG engine. In the first part of study multi-dimensional numerical simulation of transient injection process, mixing and flow field have been performed via three different validation cases in order to assure the numerical model validity of results. Adaption of such a modeling was found to be a challenging task because of required computational effort and numerical instabilities. In all cases present results were found to have excellent agreement with experimental and numerical results from literature. In the second part, using the moving mesh capability the validated model has been applied to methane Injection into the cylinder of a Direct Injection engine. Five different piston head shapes along with two injector types have been taken into consideration in investigations. A centrally mounted injector location has been adapted to all cases. The effects of injection parameters, combustion chamber geometry, injector type and engine RPM have been studied on mixing of air-fuel inside cylinder. Based on the results, suitable geometrical configuration for a NG DI Engine has been discussed.

Optimization of the compressed natural gas direct injection in a small research spark ignition engine

2017 ◽  
Vol 18 (1-2) ◽  
pp. 118-130 ◽  
Author(s):  
Francesco Catapano ◽  
Silvana Di Iorio ◽  
Paolo Sementa ◽  
Bianca Maria Vaglieco
Keyword(s):  
Natural Gas ◽  
Direct Injection ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Compressed Natural Gas
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