Experimental study on flow characteristics of vertical round jet discharged into ambient with random wave

Yong Ping Chen, Chi Wai Li, Ying Fan Barry Tam, Chang Kuan Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)


The flow fields of the vertical round jet discharged into the ambient with random wave were measured by 3-D acoustic Doppler velocity meter. The analysis of experimental data shows that the axial line velocity of jet in random wave ambient decays faster than that in still ambient, the expansion speed is accelerated and the effect of dilute by surrounding water is obviously enhanced. The turbulent intensity of the jet will be enhanced if the intensity of wave is increased. The location of peak turbulence shifts towards the inlet of jet under the effect of wave and the shifted extent is related to wave period and wave height, which indicates that the jet turbulence is generated both by the motion of wave and jet. The analysis on experimental data by dimensional analysis method shows that the whole flow field can be partitioned into three regions: Jet dominant region, transitional region and wave dominant region. A group of empirical formulas for predicting the axial velocity of jet and half-width velocity are derived based on the least-squares fitting of the experimental data.
Original languageEnglish
Pages (from-to)168-175
Number of pages8
JournalShuili Xuebao/Journal of Hydraulic Engineering
Issue number2
Publication statusPublished - 1 Feb 2008


  • Experimental study
  • Random wave ambient
  • Round non-buoyant jet

ASJC Scopus subject areas

  • Water Science and Technology
  • Energy Engineering and Power Technology
  • Mechanical Engineering


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