NASA is known for creating spacecraft that are used to get equipment – and soon humans- to the moon and neighbouring planets. However, it looks like the space organisation is now focusing its efforts closer to home.
Researchers at NASA’s Langley Research Center in Hampton, Virginia, recently conducted tests on a new type of airplane wing that has been designed to reduce noise pollution from aircraft. The test was done as part of NASA’s Advanced Air Transport Technology (AATT) Project.
In order to test the new wing design, NASA constructed a 10%-scale version of the High-Lift Common Research Model Quiet-High-Lift version of the Common Research Model (CRM-HL) to evaluate various aircraft enhancements including low-noise slats.
“The non-propulsive sources of aircraft noise include high-lift devices like the leading-edge slat and trailing-edge flaps of the aircraft’s wing. Model-scale tests, fly-over noise measurements and numerical simulations have identified the leading-edge slat as a prominent source of airframe noise during aircraft approach,” said said David Lockard, primary investigator of the CRM-QHL.
The test, which originally took place in January, was conducted in NASA Langley’s 14×22 subsonic tunnel to demonstrate the effectiveness of slat noise-reduction concepts constructed out of shape-memory alloys. The ultimate goal is to develop the technology so that industry can readily adopt it.
The QHL-CRM will continue a series of additional tests during the spring of 2021 at NASA’s Langley subsonic tunnel as researchers continue to discover more ways to reduce the noise of passing aircraft.
Picture: NASA’s Langley Research Center