Publication Date:
2019-07-13
Description:
Model-scale aeroacoustic tests of large civil transports point to the leading-edge slat as a dominant high-lift noise source in the low- to mid-frequencies during aircraft approach and landing. Using generic multi-element high-lift models, complementary experimental and numerical tests were carefully planned and executed at NASA in order to isolate slat noise sources and the underlying noise generation mechanisms. In this paper, a brief overview of the supporting computational effort undertaken at NASA Langley Research Center, is provided. Both tonal and broadband aspects of slat noise are discussed. Recent gains in predicting a slat s far-field acoustic noise, current shortcomings of numerical simulations, and other remaining open issues, are presented. Finally, an example of the ever-expanding role of computational simulations in noise reduction studies also is given.
Keywords:
Aerodynamics
Type:
Computational Aeroacoustics: From Acoustic Sources Modeling to Far-Field Radiated Noise Prediction Colloquium; Dec 09, 2003 - Dec 12, 2003; Chamonix; France
Format:
text
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