Comprehensive impingement heat transfer coefficients data are presented with varied Reynolds number, hole spacing, jet-to-target distance, and hole inclination utilizing transient liquid crystal. The impingement configurations include: streamwise and spanwise jet-to-jet spacing (X/D, Y/D) are 4∼8 and jet-to-target plate distance (Z/D) is 0.75∼3, which composed a test matrix of 36 different geometries. The Reynolds numbers vary between 5,000 and 25,000. Additionally, hole inclination pointing to the upstream direction (θ: 0 deg∼40 deg) is also investigated to compare with normal impingement jets. Local and averaged heat transfer coefficients data are presented to illustrate that (1) surface Nusselt numbers increase with streamwise development for low impingement distance, while decrease for large impingement distance. The increase or decrease variations are also influenced by Reynolds number, streamwise and spanwise spacings. (2) Nusselt numbers of impingement jets with inclined angle are similar to those of normal impingement jets. Due to the increase or decrease variations corresponding to small or large impingement distance, a two-regime-based correlation, based on that of Florschuetz et al., is developed to predict row-averaged Nusselt number. The new correlation is capable to cover low Z/D∼0.75 and presents better prediction of row-averaged Nusselt number, which proves to be an effective impingement design tool.
Skip Nav Destination
Article navigation
Research-Article
Experimental Investigation of Local and Average Heat Transfer Coefficients Under an Inline Impinging Jet Array, Including Jets With Low Impingement Distance and Inclined Angle
Weihong Li,
Weihong Li
Department of Thermal Engineering,
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Liwh13@mails.tsinghua.edu.cn
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Liwh13@mails.tsinghua.edu.cn
Search for other works by this author on:
Minghe Xu,
Minghe Xu
Department of Thermal Engineering,
Tsinghua University,
Beijing 100086, China
e-mail: xumh13@mails.tsinghua.edu.cn
Tsinghua University,
Beijing 100086, China
e-mail: xumh13@mails.tsinghua.edu.cn
Search for other works by this author on:
Jing Ren,
Jing Ren
Mem. ASME
Department of Thermal Engineering,
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Renj@tsinghua.edu.cn
Department of Thermal Engineering,
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Renj@tsinghua.edu.cn
Search for other works by this author on:
Hongde Jiang
Hongde Jiang
Department of Thermal Engineering,
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Jianghd@tsinghua.edu.cn
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Jianghd@tsinghua.edu.cn
Search for other works by this author on:
Weihong Li
Department of Thermal Engineering,
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Liwh13@mails.tsinghua.edu.cn
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Liwh13@mails.tsinghua.edu.cn
Minghe Xu
Department of Thermal Engineering,
Tsinghua University,
Beijing 100086, China
e-mail: xumh13@mails.tsinghua.edu.cn
Tsinghua University,
Beijing 100086, China
e-mail: xumh13@mails.tsinghua.edu.cn
Jing Ren
Mem. ASME
Department of Thermal Engineering,
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Renj@tsinghua.edu.cn
Department of Thermal Engineering,
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Renj@tsinghua.edu.cn
Hongde Jiang
Department of Thermal Engineering,
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Jianghd@tsinghua.edu.cn
Gas Turbine Institute,
Tsinghua University,
Beijing 100086, China
e-mail: Jianghd@tsinghua.edu.cn
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received February 18, 2016; final manuscript received July 6, 2016; published online September 27, 2016. Assoc. Editor: Amy Fleischer.
J. Heat Transfer. Jan 2017, 139(1): 012201 (12 pages)
Published Online: September 27, 2016
Article history
Received:
February 18, 2016
Revised:
July 6, 2016
Citation
Li, W., Xu, M., Ren, J., and Jiang, H. (September 27, 2016). "Experimental Investigation of Local and Average Heat Transfer Coefficients Under an Inline Impinging Jet Array, Including Jets With Low Impingement Distance and Inclined Angle." ASME. J. Heat Transfer. January 2017; 139(1): 012201. https://doi.org/10.1115/1.4034165
Download citation file:
Get Email Alerts
Cited By
Effect of Rib Blockage Ratio and Arrangements on Impingement Heat Transfer in Double-Wall Cooling
J. Heat Mass Transfer (September 2023)
Numerical Simulation of Mixed Convection Cooling of Electronic Component Within a Lid-Driven Cubic Cavity Filled With Nanofluid
J. Heat Mass Transfer (September 2023)
Experimental Analysis of the Influential Factors on Mixed Convection Flow in Horizontal Pipes
J. Heat Mass Transfer (September 2023)
The Effect of Biot Number on a Generalized Heat Conduction Solution
J. Heat Mass Transfer
Related Articles
Flow Visualization of Axisymmetric Impinging Jet on a Concave Surface
J. Heat Transfer (August,2018)
Assessment of Heat Transfer Enhancement Using Metallic Porous Foam Configurations in Laminar Slot Jet Impingement: An Experimental Study
J. Heat Transfer (February,2018)
Free Jet Impingement Heat Transfer of a High Prandtl Number Fluid Under Conditions of Highly Varying Properties
J. Heat Transfer (August,1999)
Influence of Coolant Jet Pulsation on the Convective Film Cooling of an Adiabatic Wall
J. Heat Transfer (February,2017)
Related Chapters
Hydraulic Resistance
Heat Transfer & Hydraulic Resistance at Supercritical Pressures in Power Engineering Applications
Heat Transfer Enhancement by Using Nanofluids in Laminar Forced Convection Flows Considering Variable Properties
Proceedings of the 2010 International Conference on Mechanical, Industrial, and Manufacturing Technologies (MIMT 2010)
Blowin' in the Wind
Hot Air Rises and Heat Sinks: Everything You Know about Cooling Electronics Is Wrong