Universal Journal of Mechanical Engineering Vol. 8(1), pp. 1 - 13
DOI: 10.13189/ujme.2020.080101
Reprint (PDF) (845Kb)

Flow Analysis of a Symmetrical Channel with Multiple Jets at the Upper Wall

Nuri Kayansayan ^*
Department of Mechanical Engineering, Near East University Turkey

ABSTRACT

The objective of this study is to analyze experimentally and numerically the flow characteristics of a symmetric channel arisen from flow modeling of the blade cooling problem. The two ends of the flat channel are open and five evenly spaced air jets of equal strength at the upper wall configure a symmetrical flow around the mid-slot symmetry axis. The parameters that govern the flow characteristics of such a system are; the channel height, the jet spacing, and the jet velocity. In the analysis, the slot width is kept constant, but the channel height to slot width ratio (), and the slot spacing ratio () vary in the range of 1-3 and 2-4 respectively. In addition, the flow Reynolds number (Re) is altered in a range between 1500 and 10500 for each channel geometry of nine combinations. In experiments, the pressure distributions by an electronic micro-manometer, and the velocity profiles by a hot-wire anemometry system are measured. In numerical approach, the realizable turbulence model with enhanced wall treatment is used for the turbulence computations. Comparisons with the experimental data obtained under isothermal conditions allow evaluation of the performance of the numerical model. The results show that the channel height is the dominant parameter that affects the flow characteristics and a correlation is proposed for determining the pressure drop coefficient of the injection section.

KEYWORDS
Channel Flow, Impingement, Computational Fluid Dynamics, Turbulence

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Nuri Kayansayan , "Flow Analysis of a Symmetrical Channel with Multiple Jets at the Upper Wall," Universal Journal of Mechanical Engineering, Vol. 8, No. 1, pp. 1 - 13, 2020. DOI: 10.13189/ujme.2020.080101.

(b). APA Format:
Nuri Kayansayan (2020). Flow Analysis of a Symmetrical Channel with Multiple Jets at the Upper Wall. Universal Journal of Mechanical Engineering, 8(1), 1 - 13. DOI: 10.13189/ujme.2020.080101.