New Nozzle Test Rig Developed

Abstract

Renewed interest in reducing aircraft noise has spurred the development of a new testing facility. One of the major sources of jet aircraft noise is the engine nozzle exhaust, so wind tunnel and freejet testing have been used to evaluate nozzle concepts for thrust and noise reduction. In the past, the NASA Lewis Research Center used its Jet Exit Rig to supply hot, high-pressure air to the nozzle to simulate engine exhaust, but the flow capacity of this rig was not large enough to supply larger nozzles, which are needed for more accurate noise assessment. Therefore, Lewis developed a new testing tool for this effort, the High- Flow Jet Exit Rig.