Simulation of heat transfer in transfer-gears

Marianne Mataln

Simulation of heat transfer in transfer-gears

Titel in Übersetzung: Simulation der Wärmeabgabe in Verteilergetrieben

Marianne Mataln

Lehrstuhl für Geoenergy Production Engineering (550)

Publikation: Thesis / Studienabschlussarbeiten und Habilitationsschriften › Diplomarbeit

Abstract

Das Ziel dieser Diplomarbeit war Wissen über den Wärmefluß, die Temperaturverteilung und die Effizienz von Kühlrippen an Verteilergetriebegehäusen zu erlangen. Es sollte die Effektivität Wärme über Kühlrippen abzuführen ermittelt und eine Empfehlung über die Rippenplatzierung abgegeben werden. Bis jetzt wurden Kühlrippen u.a. auf Grund von ästhetischen Aspekten im Inneren von Getriebegehäusen montiert. Während der Analyse wurde zuerst die Theorie über den Wärmefluß an Kühlrippen betrachtet. Für die Berechnung wurden Ersatzmodelle und vereinfachte Verteilergetriebe verwendet. Umgesetzt wurde dies mit Hilfe eines, in Visual Basic for Application (VBA) implementierten Ersatzmodelles. Im Anschluss daran folgte ein Vergleich der Ergebnisse mit jenen, die durch Berechnen des gleichen vereinfachten Modelles im CFD-Programm Fluent erreicht wurden. Mittels Konstruktion eines vereinfachten Verteilergetriebegehäuses konnte das Verhalten des Wärmeflusses für unterschiedlich platzierte Kühlrippen studiert werden. Die Ergebnisse daraus zeigen, dass Rippen an der Außenseite des Getriebes für die Kühlung besser und effektiver sind, als innen. Diese Erkenntnis ist wichtig für das Design von Verteilergetrieben. Für bessere Kühlung werden weniger Rippen gebraucht, dh. der Materialverbrauch wird reduziert, aber gleichzeitig die Effizienz des Getriebes erhöht und damit der Kraftstoffverbrauch des gesamten Antriebsstranges reduziert.

Titel in Übersetzung	Simulation der Wärmeabgabe in Verteilergetrieben
Originalsprache	Englisch
Betreuer/-in / Berater/-in	Brandstätter, Wilhelm, Betreuer (intern)
Datum der Bewilligung	30 Juni 2006
Publikationsstatus	Veröffentlicht - 2006

Bibliographische Notiz

gesperrt bis null

Schlagwörter

Wärmefluß Kühlrippen Verteilergetriebe Design von Verteilergetrieben Temperaturverteilung in Kühlrippen

Dieses zitieren

@phdthesis{660be521f8fb4d1e861bfa2b91350983,

title = "Simulation of heat transfer in transfer-gears",

abstract = "The main tasks of this diploma thesis were to acquire knowlegde about the heat flux, the temperature distribution and efficiency of fins in order to give a recommendation on the placing of the fins, either on the inside or the outside of a transfer gearbox. In other words the investigation's aim was to find out how effective heat can be carried off by fins in general. Until now, fins have always been designed on the inside of gearboxes to provide cooling amongst others for esthetical reasons. Throughout this analysis first a look was taken on the theory behind the heat transfer on fins and both, simplified models and gearboxes were used for calculations. This was done by creating a simplified model, which was implemented in Visual Basic for Application (VBA) and compared with results for the same model implemented in the CFD-program Fluent. A simplified gear was then created and the heat flux was investigated for different placing of the fins. The results prove that placing the fins on the outside of the gearbox is better and more effective than placing them on the inside. This knowledge is important for the design of transfer gearboxes. Further on fewer outside-fins are needed due to the better cooling, which implies that the amount of constructive material can be reduced, while at the same time increasing gear efficiency and hence reducing fuel consumption of the entire power train.",

keywords = "W{\"a}rmeflu{\ss} K{\"u}hlrippen Verteilergetriebe Design von Verteilergetrieben Temperaturverteilung in K{\"u}hlrippen, heat transfer fins gear transfer gear heat flux temperature distribution in transfer-gears",

author = "Marianne Mataln",

note = "embargoed until null",

year = "2006",

language = "English",

type = "Diploma Thesis",

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TY - THES

T1 - Simulation of heat transfer in transfer-gears

AU - Mataln, Marianne

N1 - embargoed until null

PY - 2006

Y1 - 2006

N2 - The main tasks of this diploma thesis were to acquire knowlegde about the heat flux, the temperature distribution and efficiency of fins in order to give a recommendation on the placing of the fins, either on the inside or the outside of a transfer gearbox. In other words the investigation's aim was to find out how effective heat can be carried off by fins in general. Until now, fins have always been designed on the inside of gearboxes to provide cooling amongst others for esthetical reasons. Throughout this analysis first a look was taken on the theory behind the heat transfer on fins and both, simplified models and gearboxes were used for calculations. This was done by creating a simplified model, which was implemented in Visual Basic for Application (VBA) and compared with results for the same model implemented in the CFD-program Fluent. A simplified gear was then created and the heat flux was investigated for different placing of the fins. The results prove that placing the fins on the outside of the gearbox is better and more effective than placing them on the inside. This knowledge is important for the design of transfer gearboxes. Further on fewer outside-fins are needed due to the better cooling, which implies that the amount of constructive material can be reduced, while at the same time increasing gear efficiency and hence reducing fuel consumption of the entire power train.

AB - The main tasks of this diploma thesis were to acquire knowlegde about the heat flux, the temperature distribution and efficiency of fins in order to give a recommendation on the placing of the fins, either on the inside or the outside of a transfer gearbox. In other words the investigation's aim was to find out how effective heat can be carried off by fins in general. Until now, fins have always been designed on the inside of gearboxes to provide cooling amongst others for esthetical reasons. Throughout this analysis first a look was taken on the theory behind the heat transfer on fins and both, simplified models and gearboxes were used for calculations. This was done by creating a simplified model, which was implemented in Visual Basic for Application (VBA) and compared with results for the same model implemented in the CFD-program Fluent. A simplified gear was then created and the heat flux was investigated for different placing of the fins. The results prove that placing the fins on the outside of the gearbox is better and more effective than placing them on the inside. This knowledge is important for the design of transfer gearboxes. Further on fewer outside-fins are needed due to the better cooling, which implies that the amount of constructive material can be reduced, while at the same time increasing gear efficiency and hence reducing fuel consumption of the entire power train.

KW - Wärmefluß Kühlrippen Verteilergetriebe Design von Verteilergetrieben Temperaturverteilung in Kühlrippen

KW - heat transfer fins gear transfer gear heat flux temperature distribution in transfer-gears

M3 - Diploma Thesis

ER -