Hervé Magnes, Sylvain Marragou, Andrea Aniello, Laurent Selle, Thierry Poinsot, Thierry Schuller
{"title":"预热对双涡流氢气喷射器火焰稳定性和NOx排放的影响","authors":"Hervé Magnes, Sylvain Marragou, Andrea Aniello, Laurent Selle, Thierry Poinsot, Thierry Schuller","doi":"10.1115/1.4063719","DOIUrl":null,"url":null,"abstract":"Abstract Flame stabilization, flame structure, and pollutant emissions are explored experimentally in a swirled injection system using lean air/hydrogen mixtures at atmospheric conditions and moderate Reynolds numbers. The system comprises two coaxial ducts: hydrogen flows through a central channel while air flows through an annular one, both streams being swirled. Two flame stabilization modes, M-shape and V-shape, are identified. Regions of existence for each mode are mapped based on operating conditions. At low air flow rates, the flame is either anchored or lifted depending on the path to the operating condition; at high air flow rates, the flame is always lifted. The influence of air inlet temperature (T = 300 K to 770 K) on stabilization is analyzed. Flame re-attachment is found to be governed by edge flame propagation and well-modeled by preheating effects. Unburnt hydrogen is detected only for global equivalence ratios below 0.4 and at ambient temperatures. NOx emissions decrease with reduced global equivalence ratios and show a decreasing trend as thermal power increases, irrespective of air preheating and flame stabilization regime. At high power, NOx emissions plateau at an asymptotic value. Factors like flame shape, air preheating, and chamber wall heat losses impact on NOx emissions are evaluated. NOx emissions correlate with the adiabatic flame temperature (Tad) and residence time within the combustor.","PeriodicalId":15685,"journal":{"name":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Impact of Preheating On Flame Stabilization and NOx Emissions From a Dual Swirl Hydrogen Injector\",\"authors\":\"Hervé Magnes, Sylvain Marragou, Andrea Aniello, Laurent Selle, Thierry Poinsot, Thierry Schuller\",\"doi\":\"10.1115/1.4063719\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract Flame stabilization, flame structure, and pollutant emissions are explored experimentally in a swirled injection system using lean air/hydrogen mixtures at atmospheric conditions and moderate Reynolds numbers. The system comprises two coaxial ducts: hydrogen flows through a central channel while air flows through an annular one, both streams being swirled. Two flame stabilization modes, M-shape and V-shape, are identified. Regions of existence for each mode are mapped based on operating conditions. At low air flow rates, the flame is either anchored or lifted depending on the path to the operating condition; at high air flow rates, the flame is always lifted. The influence of air inlet temperature (T = 300 K to 770 K) on stabilization is analyzed. Flame re-attachment is found to be governed by edge flame propagation and well-modeled by preheating effects. Unburnt hydrogen is detected only for global equivalence ratios below 0.4 and at ambient temperatures. NOx emissions decrease with reduced global equivalence ratios and show a decreasing trend as thermal power increases, irrespective of air preheating and flame stabilization regime. At high power, NOx emissions plateau at an asymptotic value. Factors like flame shape, air preheating, and chamber wall heat losses impact on NOx emissions are evaluated. NOx emissions correlate with the adiabatic flame temperature (Tad) and residence time within the combustor.\",\"PeriodicalId\":15685,\"journal\":{\"name\":\"Journal of Engineering for Gas Turbines and Power-transactions of The Asme\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2023-10-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Engineering for Gas Turbines and Power-transactions of The Asme\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1115/1.4063719\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Engineering for Gas Turbines and Power-transactions of The Asme","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1115/1.4063719","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Impact of Preheating On Flame Stabilization and NOx Emissions From a Dual Swirl Hydrogen Injector
Abstract Flame stabilization, flame structure, and pollutant emissions are explored experimentally in a swirled injection system using lean air/hydrogen mixtures at atmospheric conditions and moderate Reynolds numbers. The system comprises two coaxial ducts: hydrogen flows through a central channel while air flows through an annular one, both streams being swirled. Two flame stabilization modes, M-shape and V-shape, are identified. Regions of existence for each mode are mapped based on operating conditions. At low air flow rates, the flame is either anchored or lifted depending on the path to the operating condition; at high air flow rates, the flame is always lifted. The influence of air inlet temperature (T = 300 K to 770 K) on stabilization is analyzed. Flame re-attachment is found to be governed by edge flame propagation and well-modeled by preheating effects. Unburnt hydrogen is detected only for global equivalence ratios below 0.4 and at ambient temperatures. NOx emissions decrease with reduced global equivalence ratios and show a decreasing trend as thermal power increases, irrespective of air preheating and flame stabilization regime. At high power, NOx emissions plateau at an asymptotic value. Factors like flame shape, air preheating, and chamber wall heat losses impact on NOx emissions are evaluated. NOx emissions correlate with the adiabatic flame temperature (Tad) and residence time within the combustor.
期刊介绍:
The ASME Journal of Engineering for Gas Turbines and Power publishes archival-quality papers in the areas of gas and steam turbine technology, nuclear engineering, internal combustion engines, and fossil power generation. It covers a broad spectrum of practical topics of interest to industry. Subject areas covered include: thermodynamics; fluid mechanics; heat transfer; and modeling; propulsion and power generation components and systems; combustion, fuels, and emissions; nuclear reactor systems and components; thermal hydraulics; heat exchangers; nuclear fuel technology and waste management; I. C. engines for marine, rail, and power generation; steam and hydro power generation; advanced cycles for fossil energy generation; pollution control and environmental effects.