The wind pressure coefficient of the wind-capture device is defined as the ratio of the measured static pressure in the test section to the
velocity pressure of the outlet
The mean
velocity pressure acting on the external surfaces was evaluated using Eq.
Velocity pressure exposure coefficient, kz: It varies with height and can be calculated by the following equation (ASCE 7-05, Eq.
In the limit as [Q.sub.b]/[Q.sub.c] [right arrow] 0, measured branch loss coefficient data became indeterminate, i.e., [C.sub.b] [right arrow] - [infinity], as a consequence of the
velocity pressure [p.sub.v9] approaching zero in that instance.
Figure 8 illustrates the measured total pressure loss for System Section #1A as a function of the
velocity pressure upstream of the test section (based on standard conditions of air density); the resulting system loss coefficient is C = 6.048.
The equation for determining air velocity from measured
velocity pressure is:
The loss coefficient is defined as the ratio of the total pressure loss of a nonjunction fitting to that of
velocity pressure, and is given by
The fan
velocity pressure, [P.sub.vf], is the dynamic pressure based on the average velocity at the fan discharge.
The
velocity pressure switchover position of the machine was set at 5 mm for all process conditions.
*
Velocity pressure is the kinetic energy of the fluid flow.
Finally,
velocity pressure was measured in the discharge duct and primary air duct.
(a)The semi-implicit method for pressure-linked equations algorithm is used to solve the problem of
velocity pressure couple.
