Combined numerical and experimental investigation of a 15-cm valveless pulsejet

T. Geng, M. A. Schoen, A. V. Kuznetsov*, William Roberts

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

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-εmodel and the Eddy Dissipation Model (EDM), respectively. Simulation results provide physical insight into the pulsejet cycle; comparisons with experimental data are discussed.

Original languageEnglish (US)
Pages (from-to)17-33
Number of pages17
JournalFlow, Turbulence and Combustion
Volume78
Issue number1
DOIs
StatePublished - Jan 1 2007

Keywords

  • Micro-propulsion
  • Pulsejet
  • Thermoacoustics
  • Valveless pulsejet

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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