Near field screech noise computation for an underexpanded supersonic jet by the CE/SE method | Zendy

Ching Y. Loh | Zendy; Lennart S. Hultgren | Zendy; Philip C. E. Jorgenson | Zendy

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Near field screech noise computation for an underexpanded supersonic jet by the CE/SE method

Author(s) -

Ching Y. Loh,

Lennart S. Hultgren,

Philip C. E. Jorgenson

Publication year - 2001

Publication title -

nasa technical reports server (nasa)

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.2001-2252

Subject(s) - supersonic speed , jet (fluid) , physics , acoustics , rotational symmetry , noise (video) , mach number , sound pressure , shock wave , shock (circulatory) , jet noise , nozzle , mechanics , shock diamond , aeroacoustics , computation , mach wave , computer science , thermodynamics , medicine , artificial intelligence , image (mathematics) , algorithm

The space-time conservation element and solution element (CE/SE) method is employed to numerically study the near-field axisymmetric screech-tone noise of a typical underexpanded circular jet issuing from a sonic nozzle. For the computed cases, corresponding to fully expanded Mach numbers of 1.10, 1.15 and 1.19, the self-sustained feedback loop is automatically established. The computed shock-cell structure, acoustic wave length, screech tone frequencies, and sound pressure levels are in good agreement with experimental results.

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