Large-eddy simulation of complex geometry jets

Eastwood, Simon, Xia, Hao and Tucker, Paul G (2012) Large-eddy simulation of complex geometry jets. Journal of Propulsion and Power, 28 (2). pp. 235-245. ISSN 0748-4658

Full text not available from this repository.


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.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Hao Xia
Date Deposited: 26 Jun 2012 12:50
Last Modified: 04 Mar 2013 08:19
📧 Request an update