equivalent round

equivalent round

[i¦kwiv·ə·lənt ′rau̇nd]
(engineering)
The diameter of a circle whose circumference is equal to the circumference of a pipe whose cross section is not a perfect circle.

equivalent round

The diameter of a circle having a circumference equal to the outside perimeter of other than round tube.
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References in periodicals archive ?
We have completed one other culvert project with CCCP on Interstate 70 outside Indianapolis, and we are scheduled to use the process to rehabilitate a 117-by 79-inch (102 equivalent round) culvert on SR (State Road) 160 in Southeastern Indiana later in the year."
The conversion from rectangular to equivalent round can be found in Section 3.1 of ASHRAE Standard 130, Methods of Testing Air Terminal Units as well as in RP-1314.
The experimental results with varying large aspect ratio (AR=3, 6 and 10) at different downstream distance indicate that: i) when x/D> 1.33 in the major axis plane and x/D> 1 in the minor axis plane, the mean concentration, the turbulence intensity, are self-similar and the mean concentration field appear to be Gaussian, ii) axis switching phenomena happens at about x/D [approximately equal to] 7; iii) The experimental results using LIF further verify that the Elliptic jet with varying large aspect ratio has also much higher dilution in a co-flow than an equivalent round jet under the same flow conditions (same momentum flux Me and same flow rate Q).
The experimental results using LIF further verify that the Elliptic jet with varying large aspect ratio has also higher dilution in co-flow than an equivalent round jet under same conditions (same momentum flux).
Friction loss for rectangular, (3) flat oval, (4) and other shapes of duct are determined by using the equivalent round diameter.
[D.sub.e] = equivalent round diameter for equal air flow, length and fluid resistance, in.
As a result a single AMOS can deliver the equivalent rounds on target as a full battery of conventional mortars [C] Patria
Can I shoot .500 3" black powder equivalent rounds in my .500 NE double?
It fed everything from those 10mm equivalent rounds (185 grain JHP at 1150 fps) to feeble "softball" target loads, the same weight bullet in the 700 foot second range.
I've just flipped open Hercules' Guide to the listing of reloads in this persuasion for the Winchester AA-type hull, and there are 15 different combinations for Red Dot and Green Dot respectively, all of which are categorized as 3 dram equivalent rounds. Moreover, the listings include a half dozen different primers and all sorts of wads.

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