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http://dx.doi.org/10.9726/kspse.2013.17.1.064

Effect of Divergence Ratio on Heat Transfer and Friction Factor in the Diverging Channel  

Oh, Se-Kyung (Dpt. of Mechanical & System Engineering, Institute of Marine Industry, Gyeongsang National University)
Lee, Myung-Sung (Dpt. of Mechanical & System Engineering, Graduate School, Gyeongsang National University)
Jeong, Seong-Soo (Dpt. of Mechanical & System Engineering, Graduate School, Gyeongsang National University)
Ahn, Soo-Whan (Dpt. of Mechanical & System Engineering, Institute of Marine Industry, Gyeongsang National University)
Publication Information
Journal of Power System Engineering / v.17, no.1, 2013 , pp. 64-70 More about this Journal
Abstract
The heat transfer and friction factor characteristics of turbulent flows in three stationary channels have been investigated experimentally to check out the effect of divergence ratio. These are a constant cross-sectional channel and two diverging channels with ratio of divergence(Dho/Dhi) of 1.16 and 1.49. The measurement was conducted within the range of Reynolds numbers from 15,000 to 89,000 and the dimension of uniform cross-sectional test section is $100mm{\times}100mm$ at the cross section and 1,000 mm in length. The measurements of heat transfer coefficients and friction factors in the uniform channels were conducted as a reference. Because of the streamwise flow deceleration, the heat transfer and friction factor characteristics in the diverging channel were quite different from those of the constant cross-sectional channel. The effective friction factors and convective heat transfer coefficients increased with increasing the ratio of divergence of the channel.
Keywords
Diverging Channel; Heat Transfer; General Friction Factor; Ratio of Divergence; Effective Friction Factor;
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