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首页> 外文期刊>Combustion Science and Technology >DYNAMIC CHARACTERIZATION OF A LABORATORY-SCALE PULSE COMBUSTOR
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DYNAMIC CHARACTERIZATION OF A LABORATORY-SCALE PULSE COMBUSTOR

机译：实验室级脉冲燃烧器的动态特性

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摘要

Pulse combustion is a self-sustained and self-oscillating process driven by combustion, coupled with resonant oscillation of the flow in the tailpipe. This article describes the investigation of the effects of different parameters in a laboratory-scale pulse combustor and analyzes them using concepts of nonlinear dynamics. Two orientations of the fuel injection holes were used. In one orientation, the fuel comes in vertically in parallel and counter-flow with the air stream, while in the other orientation the fuel is injected horizontally at cross-flow with the air stream. For the vertical orientation, the frequency slightly decreased with decrease of global equivalence ratio and inlet flow rate. With change of lean to rich airlfuel mixture, the dynamics changes from non-pulsating to pulsating combustion. The transition from noise-dominated to periodic oscillation has also been verified by evaluating the correlation dimension. In the horizontal orientation of the fuel inlet, the pulsating behavior has been obtained even under fuel-lean conditions due to better mixing of air and fuel, and phase and fast Fourier transform plots indicate quasi-periodic behavior.
机译：脉冲燃烧是由燃烧驱动的自持和自激式过程，与排气管中流的共振振荡有关。本文介绍了对实验室规模的脉冲燃烧器中不同参数的影响的研究，并使用非线性动力学概念对其进行了分析。使用了燃料喷射孔的两个方向。在一个方向上，燃料垂直平行地进入并与气流逆流，而在另一个方向上，燃料在水平方向上与气流逆流注入。对于垂直方向，频率随着总当量比和入口流速的降低而略有下降。随着稀薄空气混合物变成浓混合气，动力学从非脉动燃烧变为脉动燃烧。通过评估相关维数也已验证了从噪声为主的振动到周期性振动的过渡。在燃油入口的水平方向上，由于空气和燃油的更好混合，即使在稀油条件下也获得了脉动特性，并且相位和快速傅立叶变换图表明了准周期特性。

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  • 来源
    《Combustion Science and Technology》 |2014年第3期|139-152|共14页
  • 作者

    Sirshendu Mondal; Achintya Mukhopadhyay; Swarnendu Sen;

  • 作者单位

    Mechanical Engineering Department, Jadavpur University, Kolkata, India,Lehrstuhl fuer Thermodynamik, Technische Universitaet Muenchen, 85748 Garching, Germany;

    Mechanical Engineering Department, Jadavpur University, Kolkata, India,Department of Mechanical Engineering and National Centre for Combustion Research and Development, Indian Institute of Technology Madras, Chennai 600 036, India Mechanical Engineering Department, Jadavpur University, Kolkata 700032, India;

    Mechanical Engineering Department, Jadavpur University, Kolkata, India;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Correlation dimension; Pulse combustor; Quasi-periodicity;

    机译：相关维度;脉冲燃烧器准周期;

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