The meaning of HYDRAULIC RADIUS is the ratio of the cross-sectional area of a channel or pipe in which a fluid is flowing to the wetted perimeter of the conduit.
Research for hydraulic performance of small bending radius helical pipe was carried out on the HTR-10 steam generator experimental facility. Based on the experimental results, it was confirmed that for helical pipe the critical Reynolds number (Re) is much greater than in a straight pipe and is...
JU Huaiming;HUANG Zhiyong;XU Yuanhui;.Hydraulic performance of small bending radius helical coil-pipe.Journal of Nuclear Science and Technology.2001.826-831Ju, H.,Huang, Z.,Xu, Y.,Duan, B.,Yu, Y.Hydraulic performance of small bending radius helical coil-pipe.Journal of Nuclear Science and ...
Hydraulic Diameter of a Circular Tube or DuctBased on equation (1) the hydraulic diameter of a circular duct can be expressed as:dh = 4 π r2/2 π r = 2 r = d (2) where r = pipe or duct inside radius (m, ft) d = pipe or duct inside diameter (m, ft)...
S = pipe slope, ft/ft or dimensionless n = Manning roughness coefficient (an empirical, dimensionless constant) Rh = hydraulic radius = cross-sect. area/wetted perimeter For a circular pipe flowing full, the hydraulic radius is: Rh = (πD2/4)/(πD) = D/4 ...
The cylinder exhibits an inner radius denoted as R1, an outer radius denoted as R2, and the depth of the crack on the inner wall is determined as a. Additionally, the pressure within the cylinder is designated as p. Figure 4 Circular hole model with crack length a. Full size image ...
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More interestingly, the differential value between breakdown pressure 𝑃𝑏Pb and fracture though pressure 𝑃𝑓Pf is also reduced, which further means that the increase in borehole radius seems to be a disadvantage for fluid injection pressurization. Consequently, the total time to fracture ...
and finally analyzed the influence of difference coefficients on the fracturing effect, in terms of different in-situ stresses. The conclusions are as follows: firstly, the influence of in-situ stress is essential for the direction, shape and quantity of fracture propagation, and the fractures gene...
3.3Safety protection device In the actual transportation process of the orbital orchard transporter driven by the hydraulic system, if an unexpected (ProQuest: ... denotes formula omitted.) where, r is the radius of the drive wheel, m; i is the worm gear ratio; V is the maximum ...