Effect of Inner-tube Position on Heat Transfer of Laminar Annular Impinging Jet with Confined Wall
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- ICHIMIYA Koichi
- Department of Mechanical System Engineering, Faculty of Engineering, Yamanashi University
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- FUKUMOTO Hiromichi
- Maekawa Ltd.
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- MIYAZAWA Toshiyoshi
- Department of Mechanical System Engineering, Faculty of Engineering, Yamanashi University
Bibliographic Information
- Other Title
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- 環状層流衝突噴流熱伝達に及ぼすノズル内管位置の影響
- カンジョウ ソウリュウ ショウトツ フンリュウ ネツ デンタツ ニ オヨボス
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Abstract
Present paper describes on the heat transfer and flow characteristics of a laminar annular impinging jet for various positions of inner-tube. In the first case, inner-tube is protruded to the flow passage. In the second case, inner-tube is retracted and relatively, outer-tube with confined insulated wall is protruded. Numerical values were obtained for the dimensionless distance between nozzle and impingement surface, H =0.5,1.0, the diameter ratio, d/D=0.2~0.6, the protrusion or retraction dimensionless length, L/H=0.0~0.8 at the Reynolds number, Re=1,000,the Prandtl number, Pr =0.72 and Grashof number, Gr = 1,000, In the first case, the flow is divided into the stagnant regionand the recirculated region in the minor flow and the major flow region. The local heat transfer for minor flow is depressed with increase of L/H. In the second case, the heat transfer increases locally with increase of L/H. Consequently, local heat transfer is controlled by combining protrusion and retraction.
Journal
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- Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers
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Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers 14 (3), 213-220, 1997
Japan Society of Refrigerating and Air Conditioning Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390282679641830272
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- NII Article ID
- 10002714154
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- NII Book ID
- AA11125910
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- ISSN
- 2185789X
- 13444905
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- NDL BIB ID
- 4353635
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed