Wall stagnating flow near the wall oscillated parallel to the flow

Taro Hirasawa; Toshihisa Ueda; Akiko Matsuo; Masahiko Mizomoto

doi:10.1299/kikaib.64.2683

Wall stagnating flow near the wall oscillated parallel to the flow

Taro Hirasawa, Toshihisa Ueda, Akiko Matsuo, Masahiko Mizomoto

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The velocity variation induced by the sinusoidal wall oscillation is measured along the stagnating streamline and its amplitude is estimated. The mechanisms of the flow velocity oscillation are discussed in terms of the amplitude of the flow velocity oscillation when the angular frequency of the wall oscillation w, the average distance between the nozzle and the wall ȳ. and the flow velocity at the nozzle exit U_o are varied. The characteristics of the flow velocity oscillation are classified into three regions by a Strouhal number S=w|ȳ_w/U_o. When S<2, the flow velocity variation follows the change of the wall location in a quasi-steady state. On the other hand, when S>6, it is dominated by the change of the wall velocity. In between, 2<S<6, the transition region is observed.

Original language	English
Pages (from-to)	2683-2689
Number of pages	7
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	64
Issue number	624
DOIs	https://doi.org/10.1299/kikaib.64.2683
Publication status	Published - 1998
Externally published	Yes

Keywords

Amplitude of velocity oscillation
Axisymmetric flow
Laminar flame
Oscillatory flow
Premixed combustion
Stretched flow
Strouhal number
Wall stagnating flow

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

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10.1299/kikaib.64.2683

Cite this

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title = "Wall stagnating flow near the wall oscillated parallel to the flow",

abstract = "The velocity variation induced by the sinusoidal wall oscillation is measured along the stagnating streamline and its amplitude is estimated. The mechanisms of the flow velocity oscillation are discussed in terms of the amplitude of the flow velocity oscillation when the angular frequency of the wall oscillation w, the average distance between the nozzle and the wall ȳ. and the flow velocity at the nozzle exit Uo are varied. The characteristics of the flow velocity oscillation are classified into three regions by a Strouhal number S=w|ȳw/Uo. When S<2, the flow velocity variation follows the change of the wall location in a quasi-steady state. On the other hand, when S>6, it is dominated by the change of the wall velocity. In between, 2<S<6, the transition region is observed.",

keywords = "Amplitude of velocity oscillation, Axisymmetric flow, Laminar flame, Oscillatory flow, Premixed combustion, Stretched flow, Strouhal number, Wall stagnating flow",

author = "Taro Hirasawa and Toshihisa Ueda and Akiko Matsuo and Masahiko Mizomoto",

year = "1998",

doi = "10.1299/kikaib.64.2683",

language = "English",

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journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",

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publisher = "Japan Society of Mechanical Engineers",

number = "624",

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TY - JOUR

T1 - Wall stagnating flow near the wall oscillated parallel to the flow

AU - Hirasawa, Taro

AU - Ueda, Toshihisa

AU - Matsuo, Akiko

AU - Mizomoto, Masahiko

PY - 1998

Y1 - 1998

N2 - The velocity variation induced by the sinusoidal wall oscillation is measured along the stagnating streamline and its amplitude is estimated. The mechanisms of the flow velocity oscillation are discussed in terms of the amplitude of the flow velocity oscillation when the angular frequency of the wall oscillation w, the average distance between the nozzle and the wall ȳ. and the flow velocity at the nozzle exit Uo are varied. The characteristics of the flow velocity oscillation are classified into three regions by a Strouhal number S=w|ȳw/Uo. When S<2, the flow velocity variation follows the change of the wall location in a quasi-steady state. On the other hand, when S>6, it is dominated by the change of the wall velocity. In between, 2<S<6, the transition region is observed.

AB - The velocity variation induced by the sinusoidal wall oscillation is measured along the stagnating streamline and its amplitude is estimated. The mechanisms of the flow velocity oscillation are discussed in terms of the amplitude of the flow velocity oscillation when the angular frequency of the wall oscillation w, the average distance between the nozzle and the wall ȳ. and the flow velocity at the nozzle exit Uo are varied. The characteristics of the flow velocity oscillation are classified into three regions by a Strouhal number S=w|ȳw/Uo. When S<2, the flow velocity variation follows the change of the wall location in a quasi-steady state. On the other hand, when S>6, it is dominated by the change of the wall velocity. In between, 2<S<6, the transition region is observed.

KW - Amplitude of velocity oscillation

KW - Axisymmetric flow

KW - Laminar flame

KW - Oscillatory flow

KW - Premixed combustion

KW - Stretched flow

KW - Strouhal number

KW - Wall stagnating flow

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IS - 624

ER -

Wall stagnating flow near the wall oscillated parallel to the flow

Abstract

Keywords

ASJC Scopus subject areas

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