Liquid Dynamics - Pulsation Analysis, Diagnostics, and Software Models


	Liquid Dynamics Fluid Flow Control Animations Piping Manifolds / Pipe Base Blocks Pulsation Dampeners Pumps: Centrifugal Pumps, Vane Pumps, Lobe Pumps, More... Pulsation Dampeners Applications Pulsation Analysis / Hydraulic Analysis Pulsation Dampeners Disassembly Fluid / Mass Flow Control Meters with Valves Pipeline Shock / Surge / Water Hammer (Hardware) Hydraulic Accumulators / Hydropneumatic Volume Storage Analysis / Diagnostics LDi: Removing the Mystery LDi: Oscillograph Pulsation Signatures LDi: Measuring, Recording, Data Capture LDi: Modeling a Pipe System LDi: Design Detail Do's and Dont's LDi: Quasi Static Expressions Liquid Dynamics Elastomer Availibility Hydraulic Analysis Sitemap / Catalog Pulsation Dampeners Shock / Surge Alleviators Hydraulic Accumulators

LDi Catalog Printable PDF32

Predict valve, membrane, & liquid mass motion, responses to flow from reciprocating 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 aspg. 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, Load	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&OEE

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.

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. USA: Pulsation Dampeners | Pulsation-Dampeners.com: Pulsation Dampeners
PulseGuard Limited: Pulsation Dampers | PulseGuard für Deutschland: Pulsationsdämpfer

Large pressure vessels, jumbo bladders, float separator / big bellows type pipeline surge attenuators and
expansion / contraction volume compensators, surge alleviators, and shock alleviators.
Shock-Guard. USA: Surge Alleviators | Water-Hammer.com: Water Hammer
ShockGuard.co.uk: Shock Alleviators | Suction-Stabilizers: Suction Stabilizers

Information about energy saving in pumping systems, standby emergency power, safety shutdown systems,
hydraulic accumulators, and hydropneumatic accumulators.
Accumulators-Hyd: Hydraulic Accumulators
Accumulators.co.uk: Hydropneumatic Accumulators | HydroTrole: Hydraulic and Control Engineering

Protection against excess flow. Protect against toxic spills when pipes burst, guard against gushers and fluid
loss when hoses split. Flow-Guard against excess flow floods with flow fuses and breather bags.
FlowGuard: Flow-Guard - Flow Fuses and Breather Bags