AF12 - Experiment

DRAG FORCE

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An experimental module for use with the AF10 Air Flow Bench to provide experiments that measure and compare the effects of drag force on objects mounted in an airstream that have the same projected frontal area but different shape. Facilities to compare drag force measurement methods are included.

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DRAG FORCE

This simple yet comprehensive experiment module consists of a duct with transparent front and rear. The front has scales printed on it to position the various parts during the experiments. A Pitot tube and simple mass balance are attached to the outside of the duct for wake traverse and direct drag measurements respectively.

It comes with three models all of the same frontal area:

  • A cylinder with a protractor, and a pressure tapping in its outer wall
  • A flat plate
  • A symmetrical aerofoil shape with a NACA profile

All the models fit in the arms of the mass balance for the wake traverse and direct measurement experiments. For cylinder pressure distribution experiments, the arms of the mass balance can be rotated clear of the duct and the cylinder model fitted between the duct walls directly. Both the Pitot tube and the cylinder tapping connect to the AF10a Manometer (ancillary) via flexible tubes fitted with quick-release couplings.

  • Determination of the drag coefficient by measurement of the pressure distribution around the cylinder.
  • Determination of the drag coefficient by wake traverse.
  • Determination of the drag coefficient around the cylinder by direct measurement and comparison to results obtained by pressure distribution and wake traverse.
  • Direct measurement and comparison of drag coefficient between a cylinder, flat plate and aerofoil.
DRAG FORCE
SUPPORTING PRODUCTS
AF10 - Base Unit

A fully mobile bench to provide basic airflow facilities to enable a wide range of practical airflow investigations. Suitable for demonstration, laboratory and project work at a basic level.

AF10A - Ancillary

A 14-tube multi-range water manometer for use with the AF10 Airflow Bench.

AF1300A - Experiment

A cylinder model with a single pressure tapping point for use with the AF1300 Subsonic Wind Tunnel.

AF1300D - Experiment

A set of two aerofoils both of NACA0012 profile and 150 mm chord for use with the AF1300 Subsonic Wind Tunnel.

AF1300E - Experiment

A 100 mm diameter flat plate for use with the AF1300 Subsonic Wind Tunnel.

AF1300J - Experiment

Five drag investigation models for use with the TecQuipment AF1300 wind tunnel - a streamlined shape, a sphere, hemisphere, "dimpled" sphere, and a flat plate. All the models have a 50mm frontal area for easy comparison

AF1450A - Experiment

A cylinder model with a single pressure tapping point for use with the AF1450 Subsonic Wind Tunnel.

AF1450D - Experiment

A set of two aerofoils both of NACA0012 profile and 150 mm chord for use with the AF1450 Subsonic Wind Tunnel.

AF1450E - Experiment

A 100 mm diameter flat plate for use with the AF1450 Subsonic Wind Tunnel.

AF1450J - Experiment

Five drag investigation models for use with the TecQuipment AF1450 wind tunnel - a streamlined shape, a sphere, hemisphere, "dimpled" sphere, and a flat plate. All the models have a 50mm frontal area for easy comparison.

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