Large-Eddy Simulations of Turbulent Flows in an Axisymmetric Dump Combustor

Afshari, Asghar; Jaberi, Farhad; Shih, Tsan‐Hsing

doi:10.2514/1.25467

Cited by 54 publications

(45 citation statements)

References 85 publications

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“…28 through 31. The configuration differs somewhat from the nonreacting case due to the addition of an upstream nozzle to allow better definition of inflow boundary conditions [172]. Figure 28 compares the computed radial variations of mean axial velocity with experimental data at four downstream stations.…”

Section: Les/filtered Density Function Methods For High-speed Reacmentioning

confidence: 99%

“…25 through 27. with the larger coefficient and the RNG model compare reasonably well with the experimental data. Close to the inflow, the dynamic Smagorinsky model gives slightly better results [172]. Figure 26 shows the centerline mean velocity decay in the dump combustor.…”

Section: Les/filtered Density Function Methods For High-speed Reacmentioning

confidence: 99%

“…One of these interesting cases considered the LES of turbulent nonreacting and reacting flow in an axisymmetric dump combustor [172]. For the reacting cases, DRUMMOND the fuel introduced into the dump combustor was propane at a fuel equivalence ratio of 0.5.…”

Section: Les/filtered Density Function Methods For High-speed Reacmentioning

confidence: 99%

“…A number of additional cases have been simulated with LES/FDF methods including high-speed mixing [167], flows with shocks [168], and combusting flows [169][170][171][172]. One of these interesting cases considered the LES of turbulent nonreacting and reacting flow in an axisymmetric dump combustor [172].…”

Section: Les/filtered Density Function Methods For High-speed Reacmentioning

confidence: 99%

“…The LES/FMDF methodology was used along with a high-order, structured-grid multiblock with a compact finite difference numerical scheme. Details are given in [172]. The code was first validated against relevant data and then used to simulate the dump combustor.…”

Section: Les/filtered Density Function Methods For High-speed Reacmentioning

confidence: 99%

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Methods for Prediction of High-Speed Reacting Flows in Aerospace Propulsion

Drummond

2014

AIAA Journal

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Section: Les/filtered Density Function Methods For High-speed Reacmentioning

confidence: 99%

Section: Les/filtered Density Function Methods For High-speed Reacmentioning

confidence: 99%

Section: Les/filtered Density Function Methods For High-speed Reacmentioning

confidence: 99%

Section: Les/filtered Density Function Methods For High-speed Reacmentioning

confidence: 99%

Section: Les/filtered Density Function Methods For High-speed Reacmentioning

confidence: 99%

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Methods for Prediction of High-Speed Reacting Flows in Aerospace Propulsion

Drummond

2014

AIAA Journal

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Large eddy simulation in generalized curvilinear coordinates using conventional approach: Theory and validation

Panjwani

Ertesvåg

Gruber

et al. 2011

Numerical Methods in Fluids

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SUMMARY Large eddy simulation (LES) methodology in curvilinear coordinates is presented in this study, where filtering is performed prior to the transformation in contrast to the alternate approach proposed by Jordan [J. Comput. Phys. 1999; 148:322–340], where filtering is done after the transformation. The main objective of the present study is to elaborate on the problems mentioned by Jordan with the conventional approach, and its consequences for the overall accuracy. The paper also provides remedies to the problems associated with the conventional approach. The present method treats the Leonard term in physical space rather than in computational space. Some practical difficulties associated with the alternate approach are also considered. Main advantages with the present conventional approach are: first an existing Reynolds averaged Navier–Stokes code can easily be extended for LES and second a wide range of existing advanced subgrid stress model can be used without any modifications. Filtering in physical space introduces a commutation error between filtering and differentiation due to non‐uniform meshes. The commutation filters in generalized coordinates are presented. LESs of four standard test cases are carried out to validate the present methodology. The four standard test cases are: (i) a lid‐driven cavity at Reynolds number (Re) of 12 000, (ii) a pipe flow at a friction Reynolds number Reτ of 360, (iii) a backward facing step at Re = 5100, and (iv) an axisymmetric confined dump combustor at Re = 11000. The results are validated against the reference data (direct numerical simulation or experiments). The mean velocity profiles and the turbulence intensities compared satisfactorily with the reference data. Copyright © 2011 John Wiley & Sons, Ltd.

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