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Combined Numerical and Experimental Investigation of a 15-cm Valveless Pulsejet

机译：15厘米无阀脉冲喷射的组合数值和实验研究

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摘要

The pulsejet, due to its simplicity, may be an ideal micro propulsion system. In this paper, modern computational and experimental tools are used to investigate the operation of a 15-cm overall length valveless pulsejet. Gas dynamics, acoustics and chemical kinetics are studied to gain understanding of various physical phenomena affecting pulsejet operation, scalability, and efficiency. Pressure, temperature, thrust, and frequency are measured as a function of valveless inlet and exit lengths and different geometries. At this length scale, it is necessary to run the pulsejets on hydrogen fuel. Numerical simulations are performed utilizing CFX to model the 3-D compressible vicious flow in the pulsejet using the integrated Westbrook–Dryer single step combustion model. The turbulent flow and reaction rate are modeled with the k–? model and the Eddy Dissipation Model (EDM), respectively. Simulation results provide physical insight into the pulsejet cycle; comparisons with experimental data are discussed.
机译：脉冲喷射器由于其简单性，可能是理想的微型推进系统。在本文中，现代的计算和实验工具用于研究15厘米总长的无阀脉冲喷射的操作。对气体动力学，声学和化学动力学进行了研究，以了解影响脉冲喷射操作，可扩展性和效率的各种物理现象。压力，温度，推力和频率是根据无阀进口和出口长度以及不同几何形状的函数进行测量的。在此长度范围内，有必要在氢气燃料上运行脉冲喷射器。利用CFX进行了数值模拟，从而使用集成的Westbrook-Dryer单步燃烧模型对脉冲喷射器中的3-D可压缩恶性流进行建模。湍流和反应速率用k–？建模。模型和涡流耗散模型（EDM）。仿真结果提供了对脉冲喷射周期的物理洞察力；讨论了与实验数据的比较。

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  • 来源
    《Flow, Turbulence and Combustion》 |2007年第1期|17-33|共17页
  • 作者

    T. Geng; M. A. Schoen; A. V. Kuznetsov; W. L. Roberts;

  • 作者单位

    Department of Mechanical and Aerospace Engineering North Carolina State University Campus Box 7910 Raleigh NC 27695-7910 USA;

    Department of Mechanical and Aerospace Engineering North Carolina State University Campus Box 7910 Raleigh NC 27695-7910 USA;

    Department of Mechanical and Aerospace Engineering North Carolina State University Campus Box 7910 Raleigh NC 27695-7910 USA;

    Department of Mechanical and Aerospace Engineering North Carolina State University Campus Box 7910 Raleigh NC 27695-7910 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    pulsejet; valveless pulsejet; micro-propulsion; thermoacoustics;

    机译：脉冲喷射;无阀脉冲喷射;微推进;热声学;

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