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Velocity Statistics of a Fully Pulsed Round Jet in Streamwise Direction

Pratomo, Hariyo P. S. and Bremhort, Klaus (2014) Velocity Statistics of a Fully Pulsed Round Jet in Streamwise Direction. Applied Mechanics and Materials, 534. pp. 117-123. ISSN 1662-7482

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      Abstract

      Keywords: hot-wire anemometer, pulsed jet, Reynolds number, Strouhal number. Abstract. In this paper, statistical quantities of a fully pulsed round jet along the jet centerline are reported. A range of the Reynolds (1.5 x 104 < Re < 4 x 104) and Strouhal (0.0064 < St < 0.0076) numbers is used to generate the jet. Physically this unsteady jet produces a series of distinct pulses due to the excitations. The mechanically excitations lead to the appearance of pulse dominated and high turbulence steady jet region in which their existence is of a strong dependence on the level of the controlled parameters. After the pulse merging completes the pulsed jet alters to a selfpreserving steady jet with a significantly higher turbulence intensity. Under a constant mass flow rate the pulsed jet tends to be more fluctuating at a less intense pulsation thus permitting the endurance of the normalized periodic component and a more rapid velocity decay in the pulsedominated region.

      Item Type: Article
      Additional Information: The experimentation was performed at Jet Laboratory, Division of Mechanical Engineering, the University Queensland under the supervision of emeritus Professor Klaus Bremhorst, PhD, AM. The preparation and further analysis of the paper was done by the first author as a research fellow at TU Darmstadt under DIKTI Overseas Scholarships.
      Subjects: T Technology > TJ Mechanical engineering and machinery
      Divisions: Faculty of Industrial Technology > Mechanical Engineering Department
      Depositing User: Hariyo Priambudi Setyo Pratomo, S.T.,M.Phil.
      Date Deposited: 04 Mar 2014 14:25
      Last Modified: 04 Mar 2014 14:25
      URI: http://repository.petra.ac.id/id/eprint/16486

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