Flow-Field and Heat Transfer of Two-Dimensional Impinging Jet Disturbed by a Circular Cylinder (The Effects of the Cylinder Diameters and the Insertion Locations)

喜昭, 羽田; 良明, 土屋; 英夫, 倉澤; 主敬, 中部; 健二郎, 鈴木

doi:10.1299/kikaib.69.1704

Trans.JSME, Ser.B

2003

DOI: 10.1299/kikaib.69.1704

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Flow-Field and Heat Transfer of Two-Dimensional Impinging Jet Disturbed by a Circular Cylinder (The Effects of the Cylinder Diameters and the Insertion Locations)

羽田喜昭¹,

土屋良明²,

倉澤英夫³

et al.

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Flow and Heat Transfer of Impinging Jet from Notched-Orifice Nozzle

Shakouchi

Kito²,

Tsuda

et al. 2011

JFST

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The centerline velocity of an orifice jet increases in the downstream direction from the nozzle exit and reaches a maximum of 1.2u ce (where u ce is the nozzle exit maximum velocity) at x/d o ≈ 2 (where d o is the nozzle exit diameter) due to the vena contracta effect; this may be effective for enhancing the heat transfer performance of an impinging jet. However, the sudden contraction at the nozzle exit creates a large flow resistance. In this study, we considered the use of notches to reduce the flow resistance and increase turbulence for the sake of good heat transfer performance from the vena contracta effect. Specifically, the effects of using a notched-orifice nozzle with taper angle α on heat transfer characteristics were examined experimentally. Hot-wire measurements were also conducted to demonstrate the spreading or mixing performance of the notched-orifice nozzle. The small notches reduced the nozzle resistance or operating power as well as increased the turbulence at the nozzle exit. The heat transfer characteristics of the notched orifice jets with tapering increased significantly because of the high turbulence intensity introduced by the notches.

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Flow and Heat Transfer of Impinging Jet from Notched-Orifice Nozzle

Shakouchi

Kito²,

Tsuda

et al. 2011

JFST

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show abstract

Flow and Heat Transfer Characteristics of Impinging Jet from Notched Orifice Nozzle(Thermal Engineering)

Shakouchi

Kito²,

Tsuda

et al. 2010

Trans.JSME, Ser.B

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Experimental Study of Flow Near a Flat Plate Around a Row of Inclined Jets

김은영¹

2011

journalofthekoreansocietyofmechanicaltechnology

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Flow-Field and Heat Transfer of Two-Dimensional Impinging Jet Disturbed by a Circular Cylinder (The Effects of the Cylinder Diameters and the Insertion Locations)

Cited by 3 publications

References 1 publication

Flow and Heat Transfer of Impinging Jet from Notched-Orifice Nozzle

Flow and Heat Transfer of Impinging Jet from Notched-Orifice Nozzle

Flow and Heat Transfer Characteristics of Impinging Jet from Notched Orifice Nozzle(Thermal Engineering)

Experimental Study of Flow Near a Flat Plate Around a Row of Inclined Jets

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