An investigation on the behavior of the torch flame in the LBGE combustion process

Abstract

Fuel conversion from heavy fuel oil (HFO) to LNG-based fuel, of which the main component is methane, is considered a suitable and practical solution. Most LBGEs adopt the pre-chamber (PC) configuration that can promote premixture combustion in the Main Combustion Chamber (MC) thanks to torch flame ejection from the orifice holes of the PC. However, the PC is sometimes specified as a starting point of the pre-ignition phenomenon that is a significant obstacle for Lean Burn Gas Engines (LBGEs) to improve their thermal efficiency. Too strong ejection may result in a misfire of the premixture MC and a considerable cyclic variation of the MC combustion. In this study, detailed observation of the combustion process was done in LBGE-simulating devices focusing on the ejection behaviors of the torch flame to clarify the source of the abnormal combustion and the cyclic variation of combustion processes.

Numerical Study of Jet Inverse Diffusion Flames Issuing from an Elliptical Burner

“…Methane and liquefied petroleum gas (LPG) are two of the possible alternatives that are widely accessible and adaptable, but they also have their pros and cons. Methane burns cleanly and lowers greenhouse gas emissions, but it is difficult to store, transport and prevent leakage [16,17]. LPG is a cheap and plentiful fuel that can enhance the performance of combustion engines and lower NOX emissions, but it also has a lot of carbon and needs special care and precautions [18,19].…”

Stability of Partially Premixed Ammonia/Methane Flames in a Concentric Flow Conical Nozzle Burner

“…Methane, which is the main constituent of natural gas, is a fuel that combusts cleanly, emitting mainly water and CO2 [5]. Various combustion applications have utilized methane, such as Lean Burn Gas Engines (LBGEs) [6]. However, this may also affect NOX emissions and other combustion characteristics.…”

Effect of Inner Swirl Angle on Flame Stability of a Double-Swirl Burner with Biogas-Methane Co-Firing

“…Methane serves as the predominant component in both biogas and natural gas (NG), offering a clean-burning fuel that primarily generates water and CO2 when combusted [14]. Methane has been involved in many combustion applications such as Lean Burn Gas Engines (LBGEs) [15]. However, methane is also a potent greenhouse gas that contributes to climate change when leaked into the atmosphere [16].…”