Dynamic-Stability Characteristics of Premixed Methane Oxy-Combustion

Author:

Shroll Andrew P.1,Shanbhogue Santosh J.1,Ghoniem Ahmed F.1

Affiliation:

1. Department of Mechanical Engineering Massachusetts Institute of Technology 77-Massachusetts Avenue, 3-342 Cambridge, MA 02139

Abstract

This work explores the dynamic stability characteristics of premixed CH4/O2/CO2 mixtures in a 50 kW swirl stabilized combustor. In all cases, the methane-oxygen mixture is stoichiometric, with different dilution levels of carbon dioxide used to control the flame temperature (Tad). For the highest Tad’s, the combustor is unstable at the first harmonic of the combustor’s natural frequency. As the temperature is reduced, the combustor jumps to fundamental mode and then to a low-frequency mode whose value is well below the combustor’s natural frequency, before eventually reaching blowoff. Similar to the case of CH4/air mixtures, the transition from one mode to another is predominantly a function of the Tad of the reactive mixture, despite significant differences in laminar burning velocity and/or strained flame consumption speed between air and oxy-fuel mixtures for a given Tad. High speed images support this finding by revealing similar vortex breakdown modes and thus similar turbulent flame geometries that change as a function of flame temperature.

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

Reference18 articles.

1. A Quantitative Comparison of Gas Turbine Cycles with CO2 Capture;Kvamsdal;Energy

2. Power Generation and Aeropropulsion Gas Turbines: From Combustion Science to Combustion Technology;Correa;Symp. (Int.) Combust.

3. Combustion Instabilities in Gas-Turbine Engines;Lieuwen

4. Dynamics and Stability of Lean-Premixed Swirl-Stabilized Combustion;Huang;Progr. Energy Combust. Sci.

5. Kaskan, W., and Noreen, A., 1954, “High Frequency Oscillations of a Flame Held by a Bluff-Body,” American Society of Mechanical Engineers, Meeting A-66, Nov 28–Dec 3, p.14.

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3