CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

pressure drop

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   September 29, 2000, 10:27
Default pressure drop
Francisco Saldarriaga
Posts: n/a
Fluid world: What is a practical way of increasing pressure drop to avoid-reduce pulsations in the rate of fuel or air supply, or both in a combustion process? The objective is to have a meanful pressure drop through the supply system so the downstream pressure have little or no influence on the flow rate.

  Reply With Quote

Old   September 29, 2000, 11:10
Default Re: pressure drop
John C. Chien
Posts: n/a
(1). If you have an old car, the oil pressure (difference) will be low due to larger gap through the bearing system. (2). In this case, you can replace the bearing, and/or the oil pump to reduce the gap thickness. (3). Or you can use thicker oil or oil additive to increase the viscosity of the oil. (4). Using the same principle, you can: reduce the diameter of the pipe at the downstream side, before entering into another device (injector or something which you didn't say). (5). Or you can change the property of the fluid (fuel) by increasing the viscosity level.
  Reply With Quote

Old   September 29, 2000, 12:13
Default Re: pressure drop
Posts: n/a
Why don't you just install some throttle valves upstream of your combustion chamber? You would be able to adjust the pressure drop and, if far enough upstream, without increasing turbulence in the chamber.
  Reply With Quote

Old   September 29, 2000, 23:23
Default Re: pressure drop
sameer mohrir
Posts: n/a
Hello Francosco Saldarriaga

You can use Pressure Reducing valves to reduce pressure of any fluid.

  Reply With Quote

Old   September 29, 2000, 23:31
Default Re: pressure drop
Chung Kuo
Posts: n/a
It is interesting you mention this pressure drop to overcome the pulsation due to discharge at downstream. Usually, as I konw, extra volume of damper or resovior is added to smooth the pressure wave. Restriction has the damping effect, but the pulse is the way for the discharge to continue. The pulse should be compensated, but not be restricted. or, I missed your point.
  Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
pressure drop in the pipe FLUENT 6 February 7, 2011 11:31
Pipe Flow - Pressure Drop Daniel L FLOW-3D 2 December 10, 2010 05:23
Total and static pressure drop Janakiram Siemens 1 February 8, 2009 02:32
Pressure Drop at entrance of a rotor-stator. Resnick Main CFD Forum 0 November 20, 2007 15:50
Periodic boundaries and pressure drop MatejK CFX 2 July 12, 2005 04:47

All times are GMT -4. The time now is 00:15.