• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Heat Transfer >Numerical Study of Inlet Turbulators Effect on the Thermal Characteristics of a Jet Propulsion-Fueled Combustor and Its Hazardous Pollutants Emission
【24h】

Numerical Study of Inlet Turbulators Effect on the Thermal Characteristics of a Jet Propulsion-Fueled Combustor and Its Hazardous Pollutants Emission

机译：入口湍流器对喷气推进燃烧器热特性及其有害污染物排放影响的数值研究

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

This work numerically studies the effects of inlet air and fuel turbulators on the thermal behavior of a combustor burning the jet propulsion (JP) (kerosene-surrogate) fuel and its resulting pollutants emission including the nanoparticulate soot aerosols and aromatic compounds. To model the soot formation, the method employs a semi-empirical two-equation model, in which the transport equations for soot mass fraction and soot number density are solved considering soot nanoparticles evolutionary process. The soot nuclea-tion is described using the phenyl route in which the soot is formed from the polycyclic aromatic hydrocarbons. Incorporating a detailed chemical mechanism described by 200 species and 6907 elementary reactions, the flamelets and their lookup table library are precomputed and used in the context of steady laminar flamelet model (SLFM). Thus, the current finite-volume method solves the transport equations for the mean mixture fraction and its variance and considers the chemistry-turbulence interaction using the presumed-shape probability density functions (PDFs). To validate the utilized models, a benchmark combustor is first simulated, and the results are compared with the measurements. Second, the numerical method is used to investigate the effects of embedding different inflow turbulators on the resulting flame structure and the combustor pollutants emission. The chosen turbulators produce mild to severe turbulence intensity (TI) effects at the air and fuel inlets. Generally, the results of current study indicate that the use of suitable turbulators can considerably affect the thermal behavior of a JP-fueled combustor. Additionally, it also reduces the combustor polycyclic aromatic hydrocarbon (PAH) pollutants emission.
机译：这项工作从数值上研究了进气和燃料涡流对燃烧喷气推进（JP）（煤油替代燃料）燃烧器的热行为及其产生的污染物排放的影响，这些污染物包括纳米微粒的烟灰气溶胶和芳香族化合物。为了模拟烟尘的形成，该方法采用半经验两方程模型，其中考虑了烟尘纳米颗粒的演化过程，求解了烟尘质量分数和烟尘数量密度的传输方程。使用苯基途径描述了烟灰的核化，其中烟灰由多环芳烃形成。结合了由200个物种和6907个基本反应所描述的详细化学机理，对小火焰及其查找表库进行了预先计算，并在稳定层流小火焰模型（SLFM）的背景下使用。因此，当前的有限体积方法求解了平均混合物分数及其方差的输运方程，并使用假定形状概率密度函数（PDFs）考虑了化学湍流相互作用。为了验证所使用的模型，首先模拟基准燃烧器，然后将结果与测量结果进行比较。其次，使用数值方法研究了嵌入不同的入流湍流器对产生的火焰结构和燃烧室污染物排放的影响。选择的湍流器会在空气和燃料入口产生轻微到严重的湍流强度（TI）效果。通常，当前的研究结果表明，使用合适的湍流器会极大地影响JP燃料燃烧器的热性能。此外，它还减少了燃烧室多环芳烃（PAH）污染物的排放。

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