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On the method of combustion instability mode determination in a cylindrical chamber and usage with experimental data.

机译:关于确定圆柱室内燃烧不稳定性模式的方法及其实验数据的应用。

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摘要

This research focused on determining the frequency, amplitude, and mode of pressure oscillations in a cylindrical atmospheric combustion chamber. The method developed for this analysis used theoretical pressure transducer traces as obtained through the solution to the dynamic pressure wave equation. Parameters obtained therein were compared to experimental pressure traces using digital signal processing and Fourier analysis techniques. Validation studies of the methodology conducted on both theoretical and historical data were in good agreement with theory. The accompanying experimental program used gaseous oxygen and methane with nitrogen diluent as oxidizer and fuel. The experimental program test matrix attempted to match full scale rocket test conditions. Open chamber acoustic mode matching results generally showed that a second tangential mode was present. Orifice plate testing showed other tangential modes present. These included the 1T, 3T and 5T modes with the 3T mode most common. Axial signal comparison results rarely matched acoustic modes.
机译:这项研究的重点是确定圆柱形大气燃烧室中压力振荡的频率,幅度和模式。为该分析开发的方法使用了理论压力传感器迹线,该迹线是通过动态压力波动方程的解获得的。使用数字信号处理和傅立叶分析技术,将其中获得的参数与实验压力曲线进行比较。在理论和历史数据上进行的方法学的验证研究与理论都非常吻合。随附的实验程序使用了气态氧气和甲烷以及氮气稀释剂作为氧化剂和燃料。实验程序测试矩阵试图匹配全面的火箭测试条件。开室声学模式匹配结果通常表明存在第二个切向模式。孔板测试显示存在其他切向模式。其中包括1T,3T和5T模式,最常见的是3T模式。轴向信号比较结果很少匹配声学模式。

著录项

  • 作者

    Richman, Benjamin M.;

  • 作者单位

    The University of Alabama in Huntsville.;

  • 授予单位 The University of Alabama in Huntsville.;
  • 学科 Engineering Aerospace.;Engineering Mechanical.
  • 学位 M.S.E.
  • 年度 2011
  • 页码 331 p.
  • 总页数 331
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TS97-4;
  • 关键词

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