Liquid Dynamics
Pulsation Analysis, Diagnostics, Prediction by Software
Pipeline and Pump user Problem -
Pulsation Analysis, Diagnostics, Prediction by Software
LIQUID DYNAMICS Ltd. offer Pulsation / Vibraton and Shock - Analysis & Diagnostics + Software Models
Please call toll free USA 1-888-326-7377 WE HAVE PEOPLE - Not voice mail. --44-161-480-9625 UK
 Fluid Flow Control Animations by Liquid Dynamics.
 
 
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> Head loss, surge pressure

> Friction losses

> Volume inefficiency

> Velocity jump shock

> Nomogram Frequency vs. Pipe ID

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LDi Catalog Printable PDF46

Check the amplitude of any highly excitational pressure spikes
In pump literature a.k.a. "Velocity Jump" causing "Joukowsky shock"

amplitude of highly excitational pressure spikes
You can reduce "Velocity Jump Shock" to a generally insignificant figure in 4 simple steps:
1. Select a dampener with an ID 12 times the diameter of the inlet connection. 2. Have an outlet 1/2 the area of the inlet. 3. Increase the volume by 3 times the inefficiency. 4. Decrease the cushion pre-fill pressure proportionately to the volume increase, from 80% of system pressure to as low as 50%.


The combined effect of mass acceleration, velocity jump, pressure wave acoustics, fittings and pipe resistance all in a time dependent frame, along with valve action, and pump characteristics may be modeled for you by: LDi PulseView software. This is not a free service. Please complete input data set tabulation.

 
Example: Actual results depend on stroke radius to connecting mechanism length, etc. Flow Velocity for crank shaft angle 180 degrees of pump rotation The velocity to which the liquid has to leap from being static in zero time 3.2 x rated flow @ 50% volumetric efficiency 2.6 x rated flow @ 64% volumetric efficiency 2.175 x rated flow @ 77.5% volumetric efficiency 1.6 x rated flow @ 87% volumetric efficiency 0.7 x rated flow @ 96.68% volumetric efficiency Pressure Time – 180 degrees of pump rotation Velocity Jump Shock Acceleration Head Theoretical steady state pipeline pressure How system pressure reacts Follow the red to green boundary Valve bounce
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Phone USA 910.270.2737
PO Box 506 Hampstead, NC 28443 USA
UK (for EC) --44(0)161-480-9625
PO Box 47, Stockport, UK SK3-OLH

Liquid Dynamics International provides pipeline and pump user problem analysis, diagnostics, prediction by software, pulsation analysis, piping system analysis, and piping system simulation. For water hammer and shock solutions pulsation dampening and shock alleviating devices can be obtained from our associate websites:
PulseGuard Inc., and Ltd. for further information about pulsation dampeners / pulsation dampers.
PulseGuard.com: Pulsation Dampeners | Pulsation-Dampeners.com: Pulsation Dampener
PulseGuard.co.uk: Pulsation Dampers | PulseGuard für Deutschland: Pulsationsdämpfer
Large gas bag vessels, jumbo bladders, float separator / big bellows type pipeline shock attenuators and
expansion / contraction volume compensators, surge alleviators, and shock alleviators.
Shock-Guard.com: Surge Alleviators | Water-Hammer.com: Water Hammer
ShockGuard.co.uk: Shock Alleviators | Suction-Stabilizers.com: Suction Stabilizers
Information about energy saving in pumping systems, standby emergency power, safety shutdown systems,
hydraulic accumulators, and hydropneumatic accumulators.
Accumulators-Hyd.com: Hydraulic Accumulators
Accumulators.co.uk: Hydropneumatic Accumulators | HydroTrole.co.uk: Hydraulic and Control Engineering
Protection against excess flow. Guard against toxic spills when pipes burst, guard against gushers and fluid
loss when hoses split, Flow-Guard guards against excess flow floods with flow fuses and breather bags
Flow-Guard.com: Flow-Guard - Flow Fuses and Breather Bags