The Influence of Nozzle-to-Plate Spacing on the Circular Hydraulic Jump of Water Jet Impingement

被引：0

作者：

Kuraan, Abdullah M. ^{[1
]}

Choo, Kyosung ^{[1
]}

机构：

[1] Youngstown State Univ, Mech & Ind Engn Dept, Youngstown, OH 44555 USA

来源：

PROCEEDINGS OF THE SIXTEENTH INTERSOCIETY CONFERENCE ON THERMAL AND THERMOMECHANICAL PHENOMENA IN ELECTRONIC SYSTEMS ITHERM 2017 | 2017年

关键词：

Impinging jet; circular; flat plate; HEAT-TRANSFER; IMPINGING JETS; LIQUID JET; FLUID-FLOW; GAS;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Heat transfer and hydrodynamics of a free water jet impinging a flat plate surface are experimentally investigated. The effects of the nozzle-to-plate spacing, which is equal to or less than one nozzle diameter (H/d = 0.08 - 1), on the Nusselt number, hydraulic jump diameter, and pressure at the stagnation point are considered. The results show that the normalized stagnation Nusselt number, pressure, and hydraulic jump diameter are divided into two regions: Region I) jet deflection region (H/d <= 0.4) and Region II) inertia dominant region (0.4 < H/d <= 1). In region I, the normalized stagnation Nusselt number and hydraulic jump diameter drastically increase as the nozzle-to-plate spacing decreases, since the stagnation pressure increases due to the jet deflection effect. In region II, the effect of the nozzle-to-plate spacing is negligible on the normalized stagnation Nusselt number and hydraulic jump diameter since the average velocity of the jet is constant, which means the jet deflection effect disappears.

引用

页码：86 / 89

页数：4

共 17 条

[1] On the circular hydraulic jump
Brechet, Y
Néda, Z
[J]. AMERICAN JOURNAL OF PHYSICS, 1999, 67 (08) : 723 - 731
[2] Comparison of thermal characteristics of confined and unconfined impinging jets
Choo, Kyo Sung
Kim, Sung Jin
[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2010, 53 (15-16) : 3366 - 3371
[3] Heat transfer characteristics of impinging air jets under a fixed pumping power condition
Choo, Kyo Sung
Kim, Sung Jin
[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2010, 53 (1-3) : 320 - 326
[4] The influence of nozzle-to-plate spacing on heat transfer and fluid flow of submerged jet impingement
Choo, Kyosung
Friedrich, Brian K.
Glaspell, Aspen W.
Schilling, Karen A.
[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2016, 97 : 66 - 69
[5] The influence of nozzle diameter on the circular hydraulic jump of liquid jet impingement
Choo, Kyosung
Kim, Sung Jin
[J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2016, 72 : 12 - 17
[6] The effect of inclination on impinging jets at small nozzle-to-plate spacing
Choo, Kyosung
Kang, Tae Yeob
Kim, Sung Jin
[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2012, 55 (13-14) : 3327 - 3334
[7] LOCAL HEAT-TRANSFER TO IMPINGING LIQUID JETS IN THE INITIALLY LAMINAR, TRANSITIONAL, AND TURBULENT REGIMES
ELISON, B
WEBB, BW
[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1994, 37 (08) : 1207 - 1216
[8] Friedrich B. K., INT J HEAT IN PRESS
[9] The effect of volumetric quality on heat transfer and fluid flow characteristics of air-assistant jet impingement
Friedrich, Brian K.
Glaspell, Aspen W.
Choo, Kyosung
[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2016, 101 : 261 - 266
[10] Kline S.J., 1952, ASME Mechanical Engineering, V75, P3

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