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    Stability Characteristics of an Actively-valved Pulse Combustor

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    Name:
    Zhu et al.-AIAA P&E 2020.pdf
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    8.924Mb
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    PDF
    Description:
    Accepted manuscript
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    Type
    Conference Paper
    Authors
    Zhu, Xuren cc
    Lisanti, Joel
    Guiberti, Thibault
    Roberts, William L. cc
    KAUST Department
    Clean Combustion Research Center
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    high-pressure combustion (HPC) Research Group
    KAUST Grant Number
    BAS/1/1370-01-01
    Date
    2020-08-17
    Online Publication Date
    2020-08-17
    Print Publication Date
    2020-08-24
    Permanent link to this record
    http://hdl.handle.net/10754/664795
    
    Metadata
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    Abstract
    This work describes the stability characteristics of an actively-valved pulse combustor through experimental methods. An ion probe detected the combustion events and a pressure sensor measured the pressure wave in the combustion chamber. By decreasing the injected fuel flow rate to approach near blow-out limit and fixing the value frequency to 270 Hz, the stability characteristics of the pulse combustor was studied systematically. The time and frequency domains of the ion and pressure data show that with decreased fuel flow rate, the ion and pressure signals amplitude decrease, time traces show some discontinuity, and low frequency oscillations appear. We then quantified the stability characteristics by introducing two indexes: the integrated power spectrum density (PSD) and PSD ratio. The indexes provide direct evidence showing that the low frequency oscillation governs the combustion dynamics when approaching blowout limit. The strong low frequency oscillation is treated as the symptom of the near blowout. The present study can be used to guide the operation of the pulse combustor and avoid low frequency oscillations.
    Citation
    Zhu, X., Lisanti, J. C., Guiberti, T., & Roberts, W. L. (2020). Stability Characteristics of an Actively-valved Pulse Combustor. AIAA Propulsion and Energy 2020 Forum. doi:10.2514/6.2020-3851
    Sponsors
    The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST), under award number BAS/1/1370-01-01.
    Publisher
    American Institute of Aeronautics and Astronautics
    ISBN
    9781624106026
    DOI
    10.2514/6.2020-3851
    Additional Links
    https://arc.aiaa.org/doi/10.2514/6.2020-3851
    ae974a485f413a2113503eed53cd6c53
    10.2514/6.2020-3851
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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