Impact of Shear Layer Swirl on Near-and Far-Field Noise Emissions from Twin-Engine Military Aircraft

Abstract

Environmental impact of aviation is measured in emissions and noise. The communities in the vicinity of airports bear the brunt of aircraft noise intakeoff, climb, flyover, approach and landing. The exposure to loud noise is harmful to human physiological and psychological health and welfare.The problem in the military (DoD) is even bigger since there are servicemen working in close proximity of advanced supersonic jets, in takeoff andlanding. The research team at The University of Kansas has identified a novel and powerful means of mitigating jet noise by inducing shear layerswirl through embedded vanes near the nozzle exit lip. In this proof-of-concept study, we aim to demonstrate the feasibility of the concept throughboth high-fidelity computational simulations and experimental investigations.

Document Details

• Document Type: Technical Report
• Publication Date: Jun 30, 2020
• Accession Number: AD1135542

Entities

People

• Charlie Zheng
• Huixuan Wu
• Ray Taghavi
• Saeed Farokhi
• Z. J. Wang

Organizations

• University of Kansas

Tags

Communities of Interest

• Air Platforms
• Biomedical
• Materials and Manufacturing Processes

DTIC Thesaurus Topics

• Acoustic Measurement
• Acoustic Phenomena
• Acoustic Properties
• Acoustics
• Aircraft Noise
• Computational Fluid Dynamics
• Computational Science
• Department Of Defense
• Far Field
• Flow
• Flow Fields
• Fluid Dynamics
• Fluid Flow
• Fluid Mechanics
• Fluids
• Frequency
• Large Eddy Simulation
• Military Aircraft
• Noise Reduction
• Nozzles
• Physics Laboratories
• Pressure Distribution
• Simulations
• Strouhal Number
• Supersonic Aircraft
• Turbulent Mixing

Fields of Study

• Physics

Readers

• Acoustics.
• Aerospace Engineering
• Computational Fluid Dynamics (CFD)

Technology Areas

• Hypersonics