Validation of a CFD Model for Coupled Simulation of Nozzle Flow, Primary Fuel Jet Break-Up and Spray Formation

Berg, Eberhard von; Edelbauer, Wilfried; Tatschl, Reinhard; Volmajer, Martin; Kegl, Breda; Alajbegovic, Ales; Ganippa, Lionel

doi:10.1115/ices2003-0643

Cited by 10 publications

(3 citation statements)

References 4 publications

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“…Surface and volume mesh were automatically created using Ansys CFX-Mesh with regard to additional settings. The mesh was refined near each narrowing in order to obtain more realistic simulation results [8] and [9].…”

Section: Meshingmentioning

confidence: 99%

Energy Saving Cooling-Unit for Plastic Moulding Machine

Lovrec

Tič

2011

SV-JME

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Compressed air is one of the major sources of energy consumption and also one of the most expensive types of energy. Consequently, special attention must be paid to its rational use. This is especially important in cases where compressed air is blowed into an "empty" space. All cleaning and cooling processes using compressed air are typical examples of such applications. They are the most wasteful consumers of compressed air. Measures to minimize air consumption in such cases are presented in the paper. The highly efficient cooling unit for plastic moulding machines has been designed and optimized based on CFD simulation, and then produced using RP/RM (Rapid Prototyping / Manufacturing) manufacturing technology. The developed and specially designed nozzle-system was used for cooling purposes during plastic canister manufacturing. The previously-used conventional cooling system had so far been recognized as the most wasteful compressed air consumer in the company. The newly-designed air-efficient cooling unit, with increased capacity for cooling air, allows for up to 50% energy savings regarding compressed air.

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Section: Meshingmentioning

confidence: 99%

Energy Saving Cooling-Unit for Plastic Moulding Machine

Lovrec

Tič

2011

SV-JME

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“…The liquid is divided into different droplet size classes; each represented by a separate droplet phase. Details about the Eulerian spray approach can be found in the publications of von Berg et al [6,7,15] and Vujanovic et al [16]. Table 1 shows the phase specification of the model.…”

Section: Physical Modelsmentioning

confidence: 99%

“…This model was later extended by a primary break-up model, as described in Ref. [7], and determines the base of the Eulerian spray model applied in this work. Other Eulerian spray models apply different kinds of the MOM (method of moments), such as the DQMOM (direct quadrature method of moments), as described by Marchisio and Fox [8].…”

Section: Introductionmentioning

confidence: 99%

Coupling of 3D Eulerian and Lagrangian Spray Approaches in Industrial Combustion Engine Simulations

Edelbauer¹

2014

JEPE

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Abstract:The Lagrangian DDM (discrete droplet model) is state-of-the-art for CFD (computational fluid dynamics) simulations of mixture formation and combustion in industrial engines. A commonly known drawback of the DDM approach is the attenuated validity in the dense spray, where the bulk liquid disintegrates into droplets. There the assumption of single droplets surrounded by a homogenous gas field is not reasonable. In this region, the Eulerian-Eulerian multi-phase approach performs better because instead of parcels the spray is represented by the volume fractions of one bulk liquid and several droplet size class phases. A further drawback of the DDM approach is that increasing the spatial resolution of the computational grid leads to a reduced statistical convergence, since the number of spray parcels per computational cell becomes smaller. It is desirable to combine the benefits of both spray approaches in coupled CFD simulations. Therefore, the dense spray region is simulated separately with the Eulerian spray approach on a highly resolved mesh covering only the region close to the nozzle orifice. The entire engine domain with combustion and emission models is simulated with the Eulerian-Lagrangian spray approach for the dilute spray region. The two simulations are coupled through exchange of boundary conditions and model source terms. An on-line coupling interface manages the data transfer between the two simulation clients, i.e., Eulerian spray and engine client. The aim of this work is to extend the coupled spray approach in terms of exchanging combustion related heat and species sources, and consequently creating the link between Eulerian spray and combustion models. The results show mixture formation and combustion in real-case engine simulations, and demonstrate the feasibility of spray model combination in engineering applications.

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