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Establishing Flashback and Blowout Limits in a Commercial Lean Premixed Combustor Operating on Synthesis Gas.

机译：在使用合成气运行的商用精益预混燃烧器中建立回火和爆破极限。

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摘要

Flashback and lean blowout are operability issues that must be addressed for successful operation of stationary gas turbines. The present work focuses on flashback and lean blowout of premixed jet flames in a combustor from a commercially available gas turbine operating on synthesis gas of various compositions. The issues of flashback and lean blowout are exacerbated when operating on fuels with high hydrogen content due to the increased reactivity of hydrogen, thus increasing the propensity for flashback. Operating margins for mixtures of natural gas (NG) and carbon monoxide (CO) in hydrogen (H2) are reported. The results demonstrate less stability near lean blowout for mixtures of H2/NG than for H2/CO. Increasing H2 concentration extends the lean operating limit from &PHgr;= 0.63 to &PHgr;= 0.29 for H2/NG and &PHgr;= 0.42 to &PHgr;= 0.29 for H2/CO. Modeling of the experimental data using a perfectly stirred reactor indicates that the Damköhler number well characterizes the effects of the addition of H2 to NG on the lean blowout limits. In addition, key factors dominating flashback behavior are identified and included in a predictive methodology. A response surface, developed from a turbulent flame speed database, is used to create a flashback propensity index as a design tool for quantifying flashback based upon experimental data from the combustor. Furthermore, the Damköhler number is explored as an index for predicting flashback and was determined to be effective at capturing the effect of pressure, making it able to link data taken at atmospheric conditions to expected engine results.
机译：闪回和稀薄喷出是固定式燃气轮机成功运行所必须解决的可操作性问题。本工作着重于燃烧器中预混合喷射火焰的回火和稀薄吹气，该燃烧器来自在各种组成的合成气上运行的市售燃气轮机。当使用高氢含量的燃料运行时，由于氢的反应性增加，反燃和贫燃爆燃的问题更加严重，因此增加了反燃的倾向。报告了氢气（H 2 ）中天然气（NG）和一氧化碳（CO）混合物的营业利润率。结果表明，与H 2 / CO相比，H 2 / NG混合物在稀燃附近的稳定性较差。 H 2 浓度的增加将稀薄运行极限从H 2 / NG的＆PHgr; = 0.63扩展到＆PHgr; = 0.29，H的＆PHgr; = 0.42扩展到＆PHgr; = 0.29 2 / CO。使用完全搅拌的反应器对实验数据进行建模表明，Damköhler数很好地表征了向稀薄井喷极限中向NG中添加H 2 的影响。此外，确定了主导闪回行为的关键因素，并将其包括在预测方法中。从湍流火焰速度数据库开发的响应面用于创建回火倾向指数，以此作为基于燃烧室实验数据量化回火的设计工具。此外，Damköhler数被用作预测闪回的指标，并被确定为可有效捕获压力影响，从而能够将在大气条件下获取的数据与预期的发动机结果联系起来。

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  • 作者

    Page, David.;

  • 作者单位

    University of California, Irvine.;

  • 授予单位 University of California, Irvine.;
  • 学科 Alternative Energy.;Energy.;Engineering Mechanical.
  • 学位 M.S.
  • 年度 2012
  • 页码 166 p.
  • 总页数 166
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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