Preprint Article Version 1 This version is not peer-reviewed

Three-Dimensional Pulsating Flow Simulation in a Multi-Point Gas Admission Valve for Large Bore CNG Engines

Version 1 : Received: 29 October 2024 / Approved: 29 October 2024 / Online: 30 October 2024 (05:30:12 CET)

How to cite: Jeong, S.-J.; Moon, S.-J. Three-Dimensional Pulsating Flow Simulation in a Multi-Point Gas Admission Valve for Large Bore CNG Engines. Preprints 2024, 2024102320. https://doi.org/10.20944/preprints202410.2320.v1 Jeong, S.-J.; Moon, S.-J. Three-Dimensional Pulsating Flow Simulation in a Multi-Point Gas Admission Valve for Large Bore CNG Engines. Preprints 2024, 2024102320. https://doi.org/10.20944/preprints202410.2320.v1

Abstract

This study examines the dynamic fluid behavior of a PWM-controlled Solenoid-Operated Gas Admission Valve (SOGAV) for large-bore CNG engines using 3D CFD simulations with dynam-ic mesh techniques. The research focuses on the influence of orifice geometry variations in the multi-hole restrictor and pressure differentials between the inlet and outlet on flow stability, turbulence, and valve performance. Results demonstrate that multi-hole restrictors with differ-ent-sized orifices improve flow uniformity and reduce turbulence, thereby mitigating flow re-sistance. Transient simulations further reveal standing wave formation and pressure wave in-terference, emphasizing that steady-state models cannot capture critical transient phenomena, such as accelerated and decelerated jet-like flows and flow separation. These findings provide key insights into SOGAV optimization, contributing to enhanced fuel efficiency and engine re-sponsiveness, meeting the performance requirements of modern gas engines.

Keywords

Solenoid Operated gas admission valve (SOGAV); Computational Fluid Dynamics; Dynamic Mesh Technique; Wave action; CNG fueled marine engine

Subject

Engineering, Automotive Engineering

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