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‘Virtual chimney’ for airports could improve local air quality

Simple fences constructed near airports could help shield nearby residents from pollution by funnelling emissions upwards, new research shows.

Researchers from several UK universities have demonstrated that fences known as baffles (a term describing structures that redirect fluids) constructed out of low-cost agricultural windbreak netting on lightweight frames could act as a ‘virtual chimney’.

‘Airfield surfaces are typically covered with grass, over which the wind can blow freely,’ said project lead Dr Mike Bennett of Manchester Metropolitan University, in a statement.

‘An array of baffles makes the surface rough in an aerodynamic sense. This sucks the momentum out of the exhaust jet, allowing its natural buoyancy to come into play. By suitably angling the baffles, we can also give the exhaust an upwards push, encouraging it to rise away from the ground.

Read more: http://www.theengineer.co.uk/sectors/civil-and-structural/news/virtual-chimney-for-airports-could-improve-local-air-quality/1015419.article#ixzz2Jv84grUJ

Details

Category

engineering

Date

February 4, 2013

Author

Sally

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