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Large-eddy simulation of complex geometry jets

journal contribution
posted on 2023-06-07, 19:53 authored by Simon Eastwood, Hao Xia, Paul G Tucker
Computations are made for chevron and coflowing jet nozzles. The latter has a bypass ratio of 6:1. Also, unlike the chevron nozzle, the core flow is heated, making the inlet conditions reminiscent of those for a real engine. A large-eddy resolving approach is used with circa 12x10(6) cell meshes. Because the codes being used tend toward being dissipative the subgrid scale model is abandoned, giving what can be termed numerical large-eddy simulation. To overcome near-wall modeling problems a hybrid numerical large-eddy simulation–Reynolds-averaged Navier–Stokes related method is used. For y 60 a Reynolds-averaged Navier–Stokes model is used. Blending between the two regions makes use of the differential Hamilton–Jabobi equation, an extension of the eikonal equation. For both nozzles, results show encouraging agreement with measurements of other workers. The eikonal equation is also used for ray tracing to explore the effect of the mean flow on acoustic ray trajectories, thus yielding a coherent solution strategy.

History

Publication status

  • Published

Journal

Journal of Propulsion and Power

ISSN

0748-4658

Publisher

American Institute of Aeronautics and Astronautics

Issue

2

Volume

28

Page range

235-245

Department affiliated with

  • Engineering and Design Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-06-26

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