Mixing Characteristics of Multijet Modified by Cyclic Perturbation

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Author(s)

Abstract

The effect of cyclic perturbation on the mixing performance of millimeter-sized multiple air jets was investigated using flow visualization, hot-wire anemometry and laser Doppler anemometry techniques. Two types of external perturbation method were used, i.e., adding an acoustic sound and applying a pulsating flow to the jet. External acoustic sounds were found to be an additional dominant factor for the jet mixing, and in the multiple-jet case, the main jet located in the middle between the two same-sized jets was split into two, entrained into the neighboring jets, and eventually merged into one developed flow. For the pulsating-jet case, depending on the phase in one cycle, the jet flow condition alternately changed between laminar and turbulent. This affected the time-mean values of the jet flow profile. An adverse change in the mixing performance at the locations near the nozzle and far downstream was obtained between the pulsating- and steady-jet cases.

Journal

  • JSME International Journal Series B

    JSME International Journal Series B 49(4), 959-965, 2006-11-15

    The Japan Society of Mechanical Engineers

References:  10

Codes

  • NII Article ID (NAID)
    110004850788
  • NII NACSIS-CAT ID (NCID)
    AA10888815
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    13408054
  • NDL Article ID
    8535542
  • NDL Source Classification
    ZN11(科学技術--機械工学・工業)
  • NDL Call No.
    Z53-Y271
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE 
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