Archives des Dynamics laws - Pignat.com

Open channel flow monitoring

PIGNAT — Tue, 23 Apr 2019 11:44:19 +0000

This unit implements the methods of open channel flow monitoring by pneumatic orifice and spillways

GENERAL SPECIFICATIONS

450L polyethylene Tank, removable lid.
SS feeding centrifugal pump.
Selection of the measurement network, by venturi or by weir.
Weir channel measurement , PVC, zone of stilling with baffles, flows into measuring channel and flows into the feeding tank.
Venturi channel measurement, PVC, zone of stilling with baffles, flows into measuring channel and flows into the feeding tank.
Weir.
Level measures : by level Ultrasonic.
Three weirs interchangeable :
- Triangular 20 °.
- Triangular 30 °.
- Square.

Instrumentation

Flowmeter.
Ultrasonic level transmitter with electronic display.

Dim : 320 x 125 x 190 cm - 400 kg
SS tubular framework 40 x 40mm

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Fluids dynamics

PIGNAT — Thu, 07 Mar 2019 13:41:04 +0000

Horizontal bench, piezometric tubes measurments

Experimental approach to fluid dynamics

GENERAL SPECIFICATIONS

100 L polyethylene storage tank with removable lid and isolating valve.
SS centrifugal pump.
Circuit 1, smooth piping, 1m, ND 20, Two 90° bends, two 45° bends, tracer injection device.
Circuit 2, Sudden narrowing from ND 25 to ND 10. Sudden enlargement from ND 10 to ND25.
Circuit 3 Smooth piping, ND 10, 1 m long. Rough piping, ND 20, 1 m long. Diaphragm, ND 10. Venturi, ND10.

Instrumentation

Float flowmeter.
Nineteen piezometric tubes.

Dim : 190 x 70 x 210 cm - 175 kg
SS tubular framework 40 x 40mm

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Fluids dynamics

PIGNAT — Thu, 07 Mar 2019 13:27:36 +0000

Introduction to fluid dynamics on a compact bench

GENERAL SPECIFICATIONS

PE storage tank, centrifugal pump.

PVC mono circuit Ø: 32 mm and Ø16 mm

90° bend.

Brutal narrowing, brutal widening.
Ring-follower valve and inclined seat valve.
180° bend, different radius.
Dye tracer injection with isolating valve.
Smooth PVC piping, 2 Ø different, L=1m.
Striped PVC piping, length 1m with a PVC elbow radius 50 mm.
Plexiglas diaphragm.
Plexiglas Venturi.
Three way valve.

Instrumentation

Flowmeter.
Differential electronic transmitter.

Dim : 190 x 75 x 180 cm - 175 kg
SS tubular framework 40 x 40mm

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Fluid dynamic on 7 pipes

PIGNAT — Thu, 07 Feb 2019 16:47:41 +0000

Study of pressure drops across various components

Valves, elbows, abrupt changes in pipe diameter

Pipes of different diameter, length and roughness

Comparison between flow rate measurement techniques

Flowmeter

Orifice measurement (Venturi and diaphragm)

Filling rate measurement

Comparison between experimental and theoretical values

Theoretical pressure drop calculations

This unit for fluid dynamics and study of energy loss is composed of various straight hydraulic

pipes of different diameters and material.The unit has the same specificities commonly encountered

in industrial hydraulic networks: elbows, valves, venturi meters for the measurement of flow rate,

and abrupt narrowing or widening of the tubes, etc.

This system functions in a closed circuit and the fluid circulation is generated by a centrifugal pump.

The measurement of energy loss is made by a differential pressure sensor.

The teaching objectives of the study are to:

– compare the flow rate measurement methods e.g. flow meter, orifice-meter (diaphragm), and venturi meter.

– verify the law of turbulent flow in the form dP = k Qv2

– determine, for each length or irregularity, the energy loss expressed:

o in equivalent length of a reference tube

o in terms of energy loss coefficient z

These different values will be compared qualitatively and quantitatively with respect to the different charts given in the literature.

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