# Heat Transfer & Hydraulic Resistance at Supercritical Pressures in Power Engineering Applications

By
I. L. Pioro
I. L. Pioro
Search for other works by this author on:
R. B. Duffey
R. B. Duffey
Search for other works by this author on:
ISBN-10:
0791802523
No. of Pages:
300
Publisher:
ASME Press
Publication date:
2007
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:
$Δp=∑Δpfr+∑Δpℓ+∑Δpac+∑Δpg,$
where Δp is the total pressure drop, Pa.
Δpfr is the pressure drop due to frictional resistance (Pa), which defined as
$Δpfr=(ξfrLDρu22)=(ξfrLDG22ρ),$
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):
$ξfr=(1(1.82log10Reb−1.64)2).$
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.

Δp is the pressure drop due to local flow obstruction (Pa), which is defined as;
$Δpℓ=(ξℓρu22)=(ξℓG22ρ),$
where ξ is the local resistance coefficient, which can be obtained from appropriate correlations for different flow obstructions.
This content is only available via PDF.