An investigation of a Zero-Net-Mass-Flux Jet in Cross flow using PIV

C. J. Dillon-Gibbons, C. Y. Wong, J. Soria

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


Zero-Net-Mass-Flux Jets in cross flow can be used in a number of engineering applications, such as combustion in a gas turbine engine and the cooling of turbine blades. ZNMF-Jets have been seen to create two distinct flow regimes when impinging into a flow, either singular or multiple trajectories as characterised by the Strouhal Number. This paper shows two cases for a ZNMFJet in Cross-flow, when the flow is singular and when the flow shows multiple trajectories, using Digital Particle Image Velocimetry (DPIV). Time and Phase-averaged experiments were conducted in a vertical water tunnel, where the ZNMF-Jet was created using a stepper motor scotch-yoke piston arrangement of cylinder diameter 20mm to force fluid through a 10mm circular jet orifice. The Strouhal Number was taken at 0.11 and 0.56 with the Reynolds Number held constant at 1066 and the velocity ratio between the free stream and the r.m.s. fluctuating velocities of the ZNMF - Jet also held constant at 2. The depth of penetration of the ZNMF-Jet into the cross flow decreases with an increase in Strouhal Number, while the strength of the vortical structures increases with increasing Strouhal Number.

Original languageEnglish
Title of host publicationProceedings of the 16th Australasian Fluid Mechanics Conference, 16AFMC
Number of pages5
Publication statusPublished - 1 Dec 2007
EventAustralasian Fluid Mechanics Conference 2007 - Crown Plaza, Gold Coast, Australia
Duration: 3 Dec 20077 Dec 2007
Conference number: 16th

Publication series

NameProceedings of the 16th Australasian Fluid Mechanics Conference, 16AFMC


ConferenceAustralasian Fluid Mechanics Conference 2007
Abbreviated title16AFMC
CityGold Coast

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