h7 experiment

FLUID MECHANICS
Page 1 of 2

H7

Friction Loss in a Pipe

For direct measurement of friction loss in a small-bore horizontal pipe, during both laminar and turbulent flow

• Directly measures friction loss in a small-bore test pipe
• Investigates laminar and turbulent flow and the transition point
• Shows the critical Reynolds Number and verifies Poiseuille’s Equation for laminar flow
• Includes precision valve for precise flow control and a Header Tank for good laminar flow
• Works with TecQuipment’s Volumetric or Gravimetric Hydraulic Benches (H1 or H1D) for easy installation •
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TecQuipment Ltd, Bonsall Street, Long Eaton, Nottingham NG10 2AN, UK
T [phone] • F [phone] • E [e-mail] • W www.tecquipment.com
An ISO 9001 certified company
PE/DB/0313

FLUID MECHANICS
Page 2 of 2

H7

Friction Loss in a Pipe

Description

Experiments

The Friction Loss in a Pipe apparatus allows students to study the change in the laws of resistance for laminar to turbulent flow and find the critical Reynolds number. The apparatus shows the flow transition point from laminar to turbulent, and is ideal for demonstrations as well as student experiments.

Study of friction loss in a pipe, including:

The equipment is a small-bore, straight test pipe on a base plate. It works with TecQuipment’s Gravimetric or
Volumetric Hydraulic Benches (H1 or H1D, available separately). Static pressure tappings upstream and downstream of the test pipe connect to a water manometer and a pressure gauge. The back panel holds the pressure gauge and a water manometer with calibrated scales. The water manometer measures lower differential pressures in the laminar and lower turbulent flow regions (just above the critical Reynolds Number). The pressure gauge measures higher pressures in the turbulent flow region. The water manometer includes an air valve and hand-pump. The hand-pump adjusts the datum of the water manometer where necessary. A valve at the downstream tapping allows students to isolate the water manometer during the higher flow tests. A precision needle valve downstream of the test pipe accurately controls flow rate.
To perform experiments, students stand the apparatus on the hydraulic bench and fit the Header Tank (supplied). For low flow rate experiments, the Header Tank supplies the test pipe. For higher flow rate experiments, the hydraulic bench supplies the test pipe directly. Students set the flow rate, measuring it by timing the collection of water in a measuring vessel (included).
Students take readings of temperature from a thermometer and readings of head from the manometer or the pressure gauge. They then use the results to produce charts to help compare actual results with theory.

Standard Features
• Supplied with a comprehensive user guide
• Two-year warranty
• Manufactured in accordance with the latest European
Union directives

• Investigations of laminar and turbulent flows
• Demonstration and measurement in the change of the laws of resistance (friction factor) from laminar to turbulent flow
• Finding the critical Reynolds Number
• Verifying Poiseuille’s Equation and the coefficient of viscosity for water in the laminar flow region

Essential Base Unit
• Gravimetric Hydraulic Bench (H1) or • Volumetric Hydraulic Bench (H1D)

Essential Services
Water supply:
From the hydraulic bench (H1 or H1D)

Operating Conditions
Operating environment:
Laboratory environment
Storage temperature range:
–25°C to +55°C (when packed for transport)
Operating temperature range:
+5°C to +40°C
Operating relative humidity range:
80% at temperatures < 31°C decreasing linearly to 50% at
40°C

Specification
Main Unit Nett Dimensions (assembled):
1000 mm long x 800 mm high x 200 mm front to back and 6 kg.
Header Tank Nett Dimensions (assembled):
400 mm high x 250 mm outside diameter and 800 mm overflow/support pipe. Combined 5 kg.
Total Nett Weight: 12 kg
Approximate Packed Dimensions and Weight:
0.2 m3 and 15 kg
Test pipe internal diameter (nominal): 3 mm
Water manometer range: 0 to 530 mm water
Pressure gauge range: 0 to 6000 mm water

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•
•

TecQuipment Ltd, Bonsall Street, Long Eaton, Nottingham NG10 2AN, UK
T [phone] • F [phone] • E [e-mail] • W www.tecquipment.com
An ISO 9001 certified company