Vortex structure in the stagnation region of an excited plane impinging jet

Jun Sakakibara, Koichi Hishida, Masanobu Maeda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Vortex structure in the stagnation region of an excited plane impinging jet has been experimentally investigated by digital particle image velocity (DPIV). Jet excitation was utilized to lock the phase of the vortex motion and all the component of phase averaged vorticity were obtained. Selective amplification of the wall jet stream component of RMS vorticity on the stagnation stream-line was recognized. Phase-averaged vorticity isosurfaces revealed that the rib vortices in the braid region and vortex potato just downstream of the spanwise rollers merge into the counter-rotating vortex pairs in the vicinity of the wall. The vorticity of the vortex pairs was augmented by the continuous stretching in the stagnation region. Production terms in the transport equation of the phase-averaged vorticity and principal axis of the strain rate tensor were evaluated to understand the transport mechanism of seeds of the counter-rotating vortices.

Original languageEnglish
Pages (from-to)1369-1376
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume62
Issue number596
Publication statusPublished - 1996 Apr
Externally publishedYes

Fingerprint

stagnation point
Vortex flow
Vorticity
vortices
vorticity
counters
wall jets
potatoes
rollers
Stretching
strain rate
Tensors
Amplification
Seed
Strain rate
seeds
tensors
excitation

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Vortex structure in the stagnation region of an excited plane impinging jet. / Sakakibara, Jun; Hishida, Koichi; Maeda, Masanobu.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 62, No. 596, 04.1996, p. 1369-1376.

Research output: Contribution to journalArticle

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