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Heat Transfer by Impingement Cooling of Spur Gears

Kromer, Christian; Plehwe, Felix C. von; Cordes, Laura; Schwitzke, Corina; Bauer, Hans-Jörg

Abstract (englisch):
Lower specific fuel consumption as well as noise reduction are the main goals in the sector of civilaeronautics engineering nowadays. One prominent concept of achieving these goals is the gearedturbofan engine, in which a planetary gear box is installed between the low pressure spool and thefan. This allows the low pressure turbine as well as the fan to rotate at optimum speeds. This way, thesame power can be generated by fewer stages in the faster rotating turbine, which in turn compensatesthe additional weight of the gear box. The main advantage of the geared turbofan is the possibilityto further increase the fan diameter and therefore improve the propulsion efficiency by means of ahigher bypass ratio. One crucial feature of the gear box is the cooling system needed to ensure safeoperating conditions during all phases of the flight envelope. For an efficient cooling system, optimizedwith respect to weight and cost, the heat transfer between the cooling fluid and the gears needs tobe understood thoroughly. In this study, the impingement cooling of spur gears by oil jets is forthe first time examined analytically and compared to experimental results. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000105930
Veröffentlicht am 20.02.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Thermische Strömungsmaschinen (ITS)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2020
Sprache Englisch
Identifikator KITopen-ID: 1000105930
Erschienen in Deutscher Luft- und Raumfahrtkongress 2019, Darmstadt, 30 September - 2 Oktober 2019
Veranstaltung Deutscher Luft- und Raumfahrtkongress (DLRK 2019), Darmstadt, Deutschland, 30.09.2019 – 02.10.2019
Verlag Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn
Schlagwörter Wärmeübergang, Prallkühlung, Zahnräder, Analytik
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