Infrared borescopic characterization of corona and conventional ignition for lean/dilute combustion in heavy-duty natural-gas engines

Mazacioglu, Ahmet; Groß, Michael; Kern, Justin; Sick, Volker

doi:10.1016/j.proci.2018.06.060

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…Beyond fundamental investigations, it is important to obtain information about the combustion process – including the reaction progress – for practically relevant transportation fuels and engine conditions [118] , [119] , [120] , [121] , [122] , [123] , [124] , [125] , [126] , [127] , [128] . Ignition behavior, flame development, heat release, the effects of injection, mixing, exhaust gas recirculation (EGR), and other characteristics can be monitored, often using optical diagnostic methods and chemical markers for certain process aspects.…”

Section: Selected Combustion Chemistry Advances – Overview and Recentmentioning

confidence: 99%

“…In a reactivity-controlled compression ignition (RCCI) engine, in-situ chemical species information from single-shot PLIF of formaldehyde was used to investigate effects of the injection procedure and the interplay of autoignition, flame propagation, and heat release [126] . Different ignition processes, early flame development, and cycle-to-cycle variations in heavy-duty natural-gas-fired engines were accessible with rapid-frame-rate borescopic IR imaging of water spectral lines in the 1–1.7 µm region [127] . Furthermore, soot formation and in-cylinder soot oxidation were analyzed in an optical engine with high-speed extinction measurements [128] .…”

Section: Selected Combustion Chemistry Advances – Overview and Recentmentioning

confidence: 99%

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Combustion in the future: The importance of chemistry

Kohse‐Höinghaus

2021

Proceedings of the Combustion Institute

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Combustion involves chemical reactions that are often highly exothermic. Combustion systems utilize the energy of chemical compounds released during this reactive process for transportation, to generate electric power, or to provide heat for various applications. Chemistry and combustion are interlinked in several ways. The outcome of a combustion process in terms of its energy and material balance, regarding the delivery of useful work as well as the generation of harmful emissions, depends sensitively on the molecular nature of the respective fuel. The design of efficient, low-emission combustion processes in compliance with air quality and climate goals suggests a closer inspection of the molecular properties and reactions of conventional, bio-derived, and synthetic fuels. Information about flammability, reaction intensity, and potentially hazardous combustion by-products is important also for safety considerations. Moreover, some of the compounds that serve as fuels can assume important roles in chemical energy storage and conversion. Combustion processes can furthermore be used to synthesize materials with attractive properties. A systematic understanding of the combustion behavior thus demands chemical knowledge. Desirable information includes properties of the thermodynamic states before and after the combustion reactions and relevant details about the dynamic processes that occur during the reactive transformations from the fuel and oxidizer to the products under the given boundary conditions. Combustion systems can be described, tailored, and improved by taking chemical knowledge into account. Combining theory, experiment, model development, simulation, and a systematic analysis of uncertainties enables qualitative or even quantitative predictions for many combustion situations of practical relevance. This article can highlight only a few of the numerous investigations on chemical processes for combustion and combustion-related science and applications, with a main focus on gas-phase reaction systems. It attempts to provide a snapshot of recent progress and a guide to exciting opportunities that drive such research beyond fossil combustion.

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Section: Selected Combustion Chemistry Advances – Overview and Recentmentioning

confidence: 99%

Section: Selected Combustion Chemistry Advances – Overview and Recentmentioning

confidence: 99%

Combustion in the future: The importance of chemistry

Kohse‐Höinghaus

2021

Proceedings of the Combustion Institute

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“…Among the new and advanced ignition methods, jet ignition stands out as an efficient and reliable highenergy ignition technology. [6][7][8][9] There are two types of jet ignition: passive and active, depending on whether the mixture in the jet chamber is enriched by an auxiliary fuel injector. In jet ignition, the mixture in the jet chamber is initially ignited by a spark plug.…”

Section: Introductionmentioning

confidence: 99%

Thermal efficiency optimization of a single cylinder gasoline engine based on active jet ignition

Zhao,

Qi,

Wang

2023

International Journal of Engine Research

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Jet ignition is a promising technology for improving the thermal efficiency of internal combustion engines (ICEs). To achieve the highest possible thermal efficiency, the jet ignition strategy was studied on a gasoline engine. Firstly, a combustion process featuring three stages of heat release, based on uniformly distributed jet ignition, was proposed. Next, the geometric structure of an active jet igniter was optimized using numerical simulations. Using the designed jet igniter, the effects of engine operating conditions were explored, including auxiliary fuel injection in the jet igniter, gross excess air ratio, and engine load and speed, with the goal of maximizing thermal efficiency. A highest indicated thermal efficiency of 50.3% was achieved, verifying the effectiveness of the proposed combustion strategy with uniformly distributed jet ignition. This study provides a technical reference for developing high-efficiency gasoline engines using jet ignition.

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Advanced Ignition System to Extend the Lean Limit Operation of Spark-Ignited (SI) Engines—A Review

Vedharaj

2021

Energy, Environment, and Sustainability

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Infrared borescopic characterization of corona and conventional ignition for lean/dilute combustion in heavy-duty natural-gas engines

Cited by 7 publications

References 23 publications

Combustion in the future: The importance of chemistry

Combustion in the future: The importance of chemistry

Thermal efficiency optimization of a single cylinder gasoline engine based on active jet ignition

Advanced Ignition System to Extend the Lean Limit Operation of Spark-Ignited (SI) Engines—A Review

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