Heat Transfer & Hydraulic Resistance at Supercritical Pressures in Power Engineering Applications
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Pioro, I. L., and Duffey, R. B. "Hydraulic Resistance." Heat Transfer & Hydraulic Resistance at Supercritical Pressures in Power Engineering Applications. Ed. I. L. Pioro, and R. B. Duffey. ASME Press, 2007.
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In general, the total pressure drop for forced convection flow inside a test section installed in the closed-loop system can be calculated according to the following expression:
where Δp is the total pressure drop, Pa.
Δpfr is the pressure drop due to frictional resistance (Pa), which defined as
where ξfr is the frictional coefficient, which can be obtained from appropriate correlations for different flow geometries. For smooth circular tubes, ξfr is as follows (Filonenko 1954):
Equation (12.3) is valid within a range of Re = 4.103 − 1012.
Usually, thermophysical properties and the Reynolds number in Equations (12.2) and (12.3) are based on arithmetic average of inlet and outlet values.
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