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.
 
   

MODELING
Main Menu
ShockView
schematic

ShockView
plots A, B, C

Input data for
shock modeling

PulseView
models relations
7 ocillographic
plots

Necess.program
input data

Equations &
sources

CATALOG
CONTACT US

LDi Catalog Printable PDF32

Predict valve, membrane, & liquid mass motion, responses to flow from recip. pump action, to generate the pressure pulsation. Ex: Initial choice, outline of equations, for compiling a fortran dt iterative display for motions & resultant pressure pulsation.
Note, in this primitive skeletal outline example of LDi method, position numbers: D, G, L, P, & V, 00, 01, 02, 03, 04, etc. are as pg. 29.

Assumption in this example are: That there is no vortex or other instability at system inlet, and that the system load, is not applied by a "spill back loop" or a "controller" that "modulates" open and closed.

1.
Suction Source
Ref.
2.
Suction Manifold Inlet Flow
A
3.
Suction Manifold Outlet Flow
A
4.
Suction Manifold Pressure Balance
B
5.
Suction Check Inlet Mass Flow
A
6.
Suction Check Pocket Flow Balance
B
7.
Suction Check Motion
C
8.
Piston Position
A
9.
V11 Flow Balance
B
10.
V11 Volume Change
 
11.
Load
 
12.
Discharge Check Inlet Mass Flow
A
13.
Discharge Check Motion
C
14.
Discharge Check Pocket Flow Balance
B
15.
Discharge Check Outlet Mass Flow
A
16.
Discharge Manifold Pressure Balance
B
17.
Discharge Manifold Outlet Mass Flow
A

REFERENCES: A/ Pump Handbook 2nd Ed. Karassik eq 38., p.3.8. B. Mechanics of Fluids 6th Ed. Massey eq 13.14 & 13.16 C. Handbook of Noise & Vibration 6th Ed. Barber, M.I.T. 1960 Library of Congress Cat Card Nbr 59-6759 E&OE

Whilst LDI PulseView software also displays "acoustics", it is primarily a mass, motion, & pressure model - not an attempt to determine them from "acoustic" frequencies and amplitudes.

www.Liquid-Dynamics.com
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.
Pulsation-Dampeners.com - Pulsation Dampener
PulseGuard.com - Pulsation Dampeners
PulseGuard.co.uk - Pulsation Dampers
PulseGuard für Deutschland - Pulsationsdämpfer
Shock-Guard.com and ShockGuard.co.uk to find 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
ShockGuard.co.uk - Shock Alleviators
Accumulators-Hyd.com and Accumulators.co.uk for 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
Flow-Guard.com to find 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 - Flow Fuses and Breather Bags


Liquid Dynamics