Line Pressure Loss for Diesel

[engineersatwork]

The Pressure Loss per length of Hydraulic Oil flowing through hoses of different sizes is readily available.

I need to find the pressure loss of diesel (Grade No. 1-D), kinematic viscosity=1.85 cSt (1.85 x 10^-6 m^2/s) flowing through a 0.50" hose @ 3 feet per second (0.91 m/s).

Any leads to where I could find such data?

Thanks.

 

[JStephen]

Start with the ol' Fluid Mechanics textbook? The "Moody Chart" as I recall.

Not sure what info is available on hoses- all you need is the roughness, which may be available from the hose manufacturer, or may be derivable from the hydraulic oil pressure loss info.

 

[TD2K]

I would start with this data

http://www.dultmeier.com/pdfs/tech-library/10Diesel_a.pdf

See what these pressures and flowrates back calculate to a roughness and then use that for your 1/2" hose. Unfortunately, I don't have any direct data for 1/2" hoses.

Or, calculate the flow rate for 3 ft/sec in a 1/2" hose to get gpm. Use the chart to read off the dP for a 3/4" hose and then adjust that to your 1/2" hose using the relationship

dP2 ~ dP1 * (d1/d2)^5 or for your case, about 7.5 times the dP in a 3/4" hose.

 

[sailoday28]

As a starter try:

http://www.tamparubber.com/mainpres.htm

http://www.hewittusa.com/Pressdrop.htm

You will have to back calculations and viscosity (Nre) adjustment and e/D, since one vendor gives dp for water in smooth hose and the other in hose with a viscosity different from yours.