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Analysis of Scavenged Pre-Chamber for Light Duty Truck Gas Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 04, 2017 by SAE International in United States
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An ongoing research and development activities on the scavenged pre-chamber ignition system for an automotive natural gas fueled engine is presented in this paper. The experimental works have been performed in engine laboratory at steady state conditions on a gas engine with 102 mm bore and 120 mm stroke, converted to a single cylinder engine. The in-house designed scavenged pre-chamber is equipped with a spark plug, fuel supply and a miniature pressure sensor for detailed combustion diagnostics. The engine was operated at constant speed, fully open throttle valve and four different fueling modes with or without spark discharge. A partly motored mode allowed direct evaluation of the pre-chamber heat release. The experimental data acquired in this research served as a validation data for the numerical simulations.
The performed tests of prototypes and calculations have recently been expanded to include 3-D flow calculations in the Ansys Fluent software. The work presents results from the coupled 1-D and 3-D numerical simulation of the flow in the pre-chamber. The main goal of the computational fluid dynamic (CFD) simulation was to describe the fluid dynamics inside the pre-chamber (without combustion), mixture distribution and assessment of the scavenging quality. The pre-chamber interior volume is analyzed in detail for the operating condition. The outputs of the simulation serve as a base for optimization of the pre-chamber design. It is also a valuable input for the optimal control setting to improve overall functionality of the scavenged pre-chamber. The simulation results were compared with the experiments.
|Technical Paper||Validation Tests for a Fast Response Flame Ionisation Detector for In-Cylinder Sampling Near the Spark Plug|
|Technical Paper||Overview of Engine Combustion Research at Sandia National Laboratories|
CitationSyrovatka, Z., Takats, M., and Vavra, J., "Analysis of Scavenged Pre-Chamber for Light Duty Truck Gas Engine," SAE Technical Paper 2017-24-0095, 2017, https://doi.org/10.4271/2017-24-0095.
Data Sets - Support Documents
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