Contact Sealing Simulation of High Pressured Diesel Injector

Vuotikka, Antti-Jussi; Nyberg, Mikael; Karhinen, Heikki; Frondelius, Tero

doi:10.23998/rm.65060

Cited by 5 publications

(6 citation statements)

References 10 publications

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“…Cylinder head simulations, as described in Leppänen et al [53] and Cattarinussi et al [71], are quite challenging due to combined low cycle-high cycle loading, as Kumpula et al [55] explain, and, for example, injectors will have their dedicated analysis as in Vuotikka et al [72]. Additionally, Nyberg et al [73] show some cast iron component study of the component explosion.…”

Section: Virtual Validationmentioning

confidence: 99%

“…The analyst simulates component temperatures with Star-CCM+ software, where both the thermal load from combustion and the cooling water flow are solved simultaneously [74]. The structural analyst uses frictional contacts for the contact interfaces between the components, considering the shrink fits and clearances in the same way as in Vuotikka et al [72].…”

Section: Example 1: Cylinder Head Thermomechanical Fatigue Analysis [53]mentioning

confidence: 99%

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Simulation-Driven Development of Combustion Engines: Theory and Examples

Frondelius

Tienhaara

Kömi

et al. 2018

SAE Technical Paper Series

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T his paper describes the simulation-driven design process used in engines technology. The research question is "how to use research in the structural analysis and dynamics field to ensure world-class product development?" This paper describes research on simulation methodologies from the design process perspective, demonstrating the need for research in various steps of product development. Each section of the paper includes one or two practical examples in which research was needed to increase product design quality. In the product definition section, the Digital Design Platform (DDP) shows the coupling between product requirements and simulation tasks. At the concept design stage, it is shown that computational methods can optimize the placement of material in the case of the main bearing cap topology. The second example is JuliaFEM, an open-source finite element method (FEM) platform, which is suitable for heavy-duty method development, where the internals of the FE solver is needed to make new calculation methodologies available. The next section is about detailed design, where an example of an oil sump welds fatigue illustrates the continuous improvement of the simulation methodology. The second example is connecting rod fretting calculation, which illustrates the full complexity of the structural analysis and dynamics simulations. The second last process step is the virtual validation, where first the cylinder head simulation methodology shows the internal connections between different disciplines' simulations. Another example here is the crankshaft virtual validation process, which describes the complexity of the "simple" component calculation as well as illustrates the number of needed competencies. Finally, in the validation process step, Big Data analyses describe the internals and complexity of the methodologies. Lastly, counterweight measurement device development illustrates that validation of the simulation models and methods sometimes leads toward a measurement device development project. As a conclusion, all the previous methodologies are used to build the Wärtsilä 31 engine, which is the most efficient four-stroke engine in the world. It is, of course, a performance achievement, but a lot of research in simulation methodologies, as explained, was needed to make a reliable product with such a high cylinder peak pressure.

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Section: Virtual Validationmentioning

confidence: 99%

Section: Example 1: Cylinder Head Thermomechanical Fatigue Analysis [53]mentioning

confidence: 99%

Simulation-Driven Development of Combustion Engines: Theory and Examples

Frondelius

Tienhaara

Kömi

et al. 2018

SAE Technical Paper Series

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“…Typical examples in industrial applications include non-linear solid mechanics [11], contact mechanics [20], finite strains [14], and fluid structure interaction problems. Here there is some simulation of machine parts having different amounts of elements and DOF's for comparison reasons.…”

Section: Big Numerical Examplementioning

confidence: 99%

JuliaFEM - open source solver for both industrial and academia usage

Frondelius¹,

Aho²

2017

RakMek

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The JuliaFEM software library is a framework that allows for the distributed processing of large Finite Element Models across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage. The basic design principle is: Everything is non-linear. All physics models are non-linear from which the linearizations are made as special cases. This is a work in progress. Thus, if you share the vision, contribute and join the community.

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“…Component temperatures are simulated with Star-CCM+ software [7], where both the thermal load from combustion and the cooling water flow are solved simultaneously [10]. The contact interfaces between the components are modeled as frictional contacts, considering the shrink fits and clearances [13].…”

Section: Simulation Workflowmentioning

confidence: 99%

Thermomechanical Fatigue Analysis of Cylinder Head

Leppänen¹,

Kumpula²,

Vaara³

et al. 2017

RakMek

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Summary. The finite element simulation of a cylinder head has been carried out with Abaqus Standard using Z-mat material model, with thermal boundary conditions coming from combined conjugate heat transfer and gas-exchange simulations. The fatigue post-processing of results has been done with Z-post software using ONERA fatigue model. The resulting lifetime values have been found out to correspond well to observations from the field.

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Contact Sealing Simulation of High Pressured Diesel Injector

Abstract: This extended abstract illustrates the simulation challenges related to highly pressurized diesel injector components and assemblies or other corresponding structures.

Cited by 5 publications

References 10 publications

Simulation-Driven Development of Combustion Engines: Theory and Examples

Simulation-Driven Development of Combustion Engines: Theory and Examples

JuliaFEM - open source solver for both industrial and academia usage

Thermomechanical Fatigue Analysis of Cylinder Head

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