University of Sussex

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Large eddy simulation of a hot, high speed coflowing jet

posted on 2023-06-08, 14:31 authored by Simon Eastwood, Paul G Tucker, Hao Xia
Computations are made of a short cowl coflowing jet nozzle with a bypass ratio 8 : 1. The core flow is heated, making the inlet conditions reminiscent of those for a real engine. A large eddy resolving approach is used with a 12 × 106 cell mesh. Since the code being used tends towards being dissipative the sub-grid scale (SGS) model is abandoned giving what can be termed Numerical Large Eddy Simulation (NLES). To overcome near wall modelling problems a hybrid NLES-RANS (Reynolds Averaged Navier-Stokes) related method is used. For y+ <= 60 a k–l model is used. Blending between the two regions makes use of the differential Hamilton-Jabobi (HJ) equation, an extension of the eikonal equation. Results show encouraging agreement with existing measurements of other workers. The eikonal equation is also used for acoustic ray tracing to explore the effect of the mean flow on acoustic ray trajectories, thus yielding a coherent solution strategy.


Publication status

  • Published

Page range


Presentation Type

  • paper

Event name

ASME Turbo Expo 2011: Power for Land, Sea and Air

Event location

Vancouver, British Columbia, Canada

Event type


Event date

6-10th June, 2011

Department affiliated with

  • Engineering and Design Publications

Full text available

  • No

Peer reviewed?

  • Yes

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