• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Numerical performance analysis of an annular miniature gas turbine power system using fuels with low heating values
【24h】

Numerical performance analysis of an annular miniature gas turbine power system using fuels with low heating values

机译：低热值燃料使用的环形微型燃气轮机动力系统的数值性能分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Purpose - Utilizing renewable energy and developing new energy sources are practical responses to the shortage of fossil fuels and environmental regulations for carbon dioxide emissions. The purpose of this paper is to assess the practicability of using low heating value (LHV) fuel on an annular miniature gas turbine (MGT) via numerical simulations.rnDesign/methodology/approach - The MGT used in this study is MW-44 Mark I, whose original fuel is liquid (Jet A1). Its fuel supply system is re-designed to use biogas fuel with LHV. The simulations, aided by the commercial code CFD-ACE+, were carried out to investigate the cooling effect in a perforated combustion chamber and combustion behavior in an annular MGT when using LHV gas. In this study, four parameters of rotational speeds are considered. At each specific speed, various mixture ratios of methane (CH_4) to carbon dioxide (CO_2) including 90, 80, 70, and 60 percent were taken into consideration as simulated LHV fuels.rnFindings - The simulation results show the chamber design can create a proper recirculation zone to concentrate the flame at the center of the chamber, and prevent the flame from expanding to cause hot spot. Furthermore, the hot gas exhausted from combustor outlet is cooled down effectively by jet flow discharged from dilution holes, which prevent turbine blade from heat damage. Originality/value - Simulation results demonstrate that CFD-ACE+ can simulate flow field performance and combustion behavior in an annular MGT precisely. The results of these CFD analyses confirm that the methane fuel can be used in such small volume of MGT and still have high performance. With the aid of the constructed combustor model, the performance of a methane-used MGT can be realized before the experiment procedure starts.
机译：目的-利用可再生能源和开发新能源是对化石燃料短缺和二氧化碳排放环境法规的切实回应。本文的目的是通过数值模拟评估在环形微型燃气轮机（MGT）上使用低热值（LHV）燃料的实用性。设计/方法/方法-本研究中使用的MGT为MW-44 Mark I ，其原始燃料为液体（喷气A1）。其燃料供应系统经过重新设计，可使用带有LHV的沼气燃料。在商业代码CFD-ACE +的帮助下进行了模拟，以研究使用LHV气体时在多孔燃烧室中的冷却效果和环形MGT中的燃烧行为。在这项研究中，考虑了四个转速参数。在每种特定速度下，甲烷（CH_4）与二氧化碳（CO_2）的各种混合比（包括90％，80％，70％和60％）都作为模拟LHV燃料考虑在内。rn发现-模拟结果表明，燃烧室设计可以产生适当的再循环区，以将火焰集中在燃烧室的中心，并防止火焰膨胀而引起热点。此外，从燃烧室出口排出的热气被稀释孔排出的射流有效地冷却，从而防止了涡轮叶片的热损伤。原创性/价值-仿真结果表明CFD-ACE +可以精确地模拟环形MGT中的流场性能和燃烧行为。这些CFD分析的结果证实，甲烷燃料可用于如此小体积的MGT，并且仍具有高性能。借助构建的燃烧器模型，可以在实验程序开始之前实现甲烷使用的MGT的性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号