Near and far field

Quantum mechanics

Engineering

Point source

Computational physics

Radiation

Jet noise

Computer science

Acoustics

Jet (fluid)

Mechanical engineering

Physics

Optics

Flow (mathematics)

Image (mathematics)

Cylinder

Electromagnetic shielding

Artificial intelligence

Mechanics

Noise (video)

asme

The influence on jet noise radiation of the interaction with the heated moving flow of a parallel twin jet is investigated. An analytical model of jet shielding is developed which consists of the sound field emitted from a stationary, discrete frequency point source impinging on a cylinder of locally parallel flow. The zones in which the various shielding mechanisms dominate are analyzed using the model. The effects of parameters such as jet temperature and flow speed are examined. It is found that the results obtained using the model are comparable to the experimental results for a point noise source impinging on a subsonic isothermal air jet.

Analysis of the effect of heated jet flow on the far field radiation from a noise source