Fanning formula

See nomenclature for definition of symbols and units. The units presented are English engineering units, unless a conversion is required. The friction factor is the only experimental variable that must be determined by reference to the above equations and it is represented by Figure 2-3. Note that this may sometimes be referred to as the Fanning formula, and may be modified to )held a fric-... 

Dry air at 80°F (300 K) and 150 psia (1034 kPa) flows at the rate of 500 ft3/min (0.24 m3/s) through a 4-in schedule 40 pipe from the discharge of an air compressor. What is the flow rate in pounds per hour and the air velocity in feet per second Using the Fanning formula, determine the pressure loss if the total equivalent length of the pipe is 500 ft (153 m). 

The frictional loss of energy, dF/dx, is given by the Fanning formula in its differential form ... 

Electrical costs for fans can be estimated from the following formula ... 

It is now possible to calculate the total system resistance and select a suitable fan and collector. The following will illustrate the use of the formula. 

This is a form of the Fanning or Darcy formula with friction factor = 0.0055. This friction factor corresponds to approximately the following ... 

The exhaust fan in your reaction box or fumehood must be a sparkless motor. On most all formulas, fume evacuation is a must ... 

Formulas that promote bowel movement containing harsh herbs such as Da Huang (Rhei rhizoma), Fan Xie Ye [Sennae folium) and Mang Xiao (Natrii sulfas) move downward, and should be used with caution. 

For the relatively narrow peak of energy losses with the maximum at ha)0n, the transition cross section a0n integrated over q and [Pg.315]

The formula mixture is finally forced (extruded) through a set of dies where it is drawn into long, thin strands.These strands are pulled through contact cooling water for a few seconds, which causes the resin to set before it enters a pelletizer. The pelletizer is a sharp fan or chopper that rotates at a specific speed coordinated with the strand feed rate to slice the strands into pellets of the desired size. The pellets are then automatically screened, and pellet product of the correct specification size range is dropped into the desired packing container. Rejected pellets and particle product are returned as feedstock to the front of the extrusion process for reprocessing. 

F-method, heat transfer, 173, 175-177 example, 180 formulas. 179 Fans, 143... 

We notice from Eq. (1) that the wall shear stress x is constant within the laminar boundary layer, and for this case is 0.25 dyne/ cm. As far as calculation of the wall shear stress for a known stream velocity is concerned, we point out that the use of Fanning s factor alone suffices to determine its value, and we do not need all the formulas stated above. 

Alkali metal compounds of chromium of the formula MCrgOg result from heating the dichromates with CrOs at SSO"" for a few hours (Suchow, Fan-kuchen and Ward, 1952). 

I When lOOcm of ahydrocarbonX bumin SOOcm of oxygen, SOcm of oxyven are unus, 300cm of carbon dioxide are foimed, and 300 cm of steam are fanned. Deduce the equation for tbe reaction and the formula of the hydrocarbon. 

The formula (5) is the theoretical basis on which calculating natural wind pressure by adjusting operation points of the fan. 

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