含氢/甲烷-空气混合物的大气单喷嘴射流稳定FLOX®燃烧器燃料和负载灵活性研究

IF 1.4 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Niklas Petry, Manu Mannazhi, Zhiyao Yin, Oliver Lammel, Klaus Peter Geigle, Andreas Huber
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引用次数: 0

摘要

本文将同轴燃料喷嘴同心安装在外空气喷嘴内,并以两种不同的布置方式进行布置。在第一种非预混情况下,燃料和空气喷嘴在喷嘴出口处是齐平的。在第二种,部分预混的情况下,燃料喷嘴在空气喷嘴出口50mm以下终止。第三种完全预混的情况是通过在喷嘴出口上游1m处的空气中向直列混合器注入燃料来实现的。此外,使用两种不同尺寸(内径= 2和1.5 mm)的燃油喷嘴进行测量。对于所有这些情况,燃料中氢的百分比从0到100%变化(恒定当量比,f = 0.74,热功率Pth = 10.5 kW,在空气预热Tpre = 300 K时,射流出口速度保持在vexit = 100 m/s左右),并使用2D OH*化学发光测量来表征所产生的火焰。此外,通过改变等效比(f = 0.74 ~ 0.21),研究了100% H2情况下的负载柔韧性。进一步研究了粒子成像测速(PIV)技术在一定条件下获得的速度场。实验结果表明,喷嘴结构(混合度)、当量比和h2含量对火焰形状有很大影响。此外,这项工作的结果正在共同努力中用于验证喷气稳定氢燃烧的数值模型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigation of Fuel and Load Flexibility of an Atmospheric Single Nozzle Jet-Stabilized FLOX® Combustor with Hydrogen/methane-Air Mixtures
Abstract In this work, a coaxial fuel nozzle was installed concentrically inside the outer air nozzle and was arranged in two different configurations. In the first, non-premixed case, the fuel and air nozzles were flush at the nozzle exit. In the second, partially premixed case, the fuel nozzle terminated 50 mm below the air nozzle exit. A third, fully premixed case was achieved by injecting fuel into an inline-mixer in the air 1 m upstream of the nozzle exit. Additionally, measurements were performed using fuel nozzles with two different sizes (inner diameters = 2 and 1.5 mm). For all these cases, percentage of hydrogen in the fuel was varied from 0 to 100 % (constant equivalence ratio, f = 0.74, thermal power Pth = 10.5 kW, jet exit velocity was kept at about vexit = 100 m/s at an air preheating Tpre = 300 K) and the resulting flames were characterized using 2D OH* chemiluminescence measurements. In addition, load-flexibility was investigated on the 100 % H2 case by varying the equivalence ratio (f = 0.74 to 0.21). Some selected conditions were further investigated using particle imaging velocimetry (PIV) to obtain velocity fields. The experimental results demonstrated a strong influence of nozzle configurations (mixedness), equivalence ratio and H2-content on flame shapes. Furhtermore, the results from this work are being used in a joint effort to validate numerical models for jet-stabilized hydrogen combustion.
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来源期刊
CiteScore
3.80
自引率
20.00%
发文量
292
审稿时长
2.0 months
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.
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