Messung und Abscheidung von Ölnebelaerosolen aus der Kurbelgehäuseentlüftung von Verbrennungsmotoren

Sauter, Hartmut; Trautmann, Pius

doi:10.1007/bf03255052

Cited by 13 publications

(2 citation statements)

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“…Experimental data of the droplet size distribution in the crankcase of various gasoline and diesel engines and different engine operating points can be found in the literature. 15 Despite the huge number of engines and operating points always a similar droplet size distribution has been determined close to the oil separator, because the droplet formation in the crankcase depends on the same physical principles. The measured results show a droplet size distribution in the range of 0.1 µm to 30 µm.…”

Section: Crankcase Multiphase Flow Simulationmentioning

confidence: 99%

Numerical simulation of the multiphase flow phenomena in the crankcase of an internal combustion engine

Oliva

Wachtmeister

2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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The flow processes in the crankcase of an internal combustion engine are essential for many sub areas of a combustion engine. Piston cooling, oil transport through the main and conrod bearings or the tribology of the piston assembly are some of them and take place in the crankcase. The oil supply of the liner plays an important role for the friction losses of an engine. Additionally oil aerosols are emerging in the crankcase. The sizes of the droplets are crucial for the oil separator dimensioning. Due to blow-by a part of the crankcase gas flows back to the intake manifold (via the oil separator) and the containing oil in the flow is responsible for additional emissions of the engine. This study introduces a simulation method for the calculation of the multiphase flow phenomena in the crankcase of a four-cylinder diesel engine. All relevant effects have been identified and modeled numerically. The detailed geometry of the crankcase volume and all moving parts of the piston assembly have been considered in the model. To calculate the multiphase flow in the crankcase a discrete particle method has been chosen, where the gas flow is described continuously and the oil flow is modeled with the discrete droplet method. With this method the oil flow and the interaction with the gas flow can be calculated. The computational fluid dynamics results enable new insights into the crankcase flow of an internal combustion engine and therefore statements about the oil distribution in the crankcase can be made. That leads to further knowledge of the transport processes in the crankcase.

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Section: Crankcase Multiphase Flow Simulationmentioning

confidence: 99%

Numerical simulation of the multiphase flow phenomena in the crankcase of an internal combustion engine

Oliva

Wachtmeister

2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Diese Blow-by-Gase strömen während des Verbrennungsprozesses als Leckagestrom durch die konstruktiv bedingten Spalten zwischen Kolben und Zylinderwand in das Kurbelgehäuse. Die Tropfengrößenverteilung der mit dem Blow-by-Gas transportierten Öltropfen bewegt sich in Abhängigkeit des Motors und des motorischen Lastzustandes im Mittel (massenmittlerer Durchmesser d 50,3 ) zwischen 0,5 lm bis 1,6 lm [2]. Die Ölaerosole führen zu einer Verschmutzung des Ladeluftkühlers, der Einlassventile und der Steuerklappen im Saugrohr oder beeinträchtigen die Funktion der Abgaskatalysatoren durch metallbasierte Additive im Motoröl.…”

Section: Introductionunclassified

Droplet Separation from the Gas Phase in Small‐Scale Ring Chamber Centrifuges

Piesche

Junker

Grabe

2014

Chemie Ingenieur Technik

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Droplet Separation from the Gas Phase in Small-Scale Ring Chamber CentrifugesHere, the laminar fluid flow in small-scale ring chamber centrifuges is investigated to describe the separation behavior of oil aerosols by means of models and laws of similitude. The key objective is the determination of the separation efficiency dependent on the centrifugal geometry, the material properties of the continuous and disperse phases as well as operational parameters such as angular velocity and volume flow. Experimental investigations were conducted to assess the range of validity, the usability and the accuracy of the models.

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