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Prediction of Heat Transfer in a Jet Cooled Aircraft Engine Compressor Cone Based on Statistical Methods

Bleier, Fabian; Schwitzke, Corina; Bauer, Hans-Jörg

Abstract:
The paper presents the setup and analysis of an experimental study on heat transfer of a jet cooled compressor rear cone with adjacent conical housing. The main goal of the paper is to describe the systematic derivation of empirical correlations for global Nusselt numbers to be used in the design process of a jet engine secondary air system. Based on the relevant similarity parameters obtained from literature, operating points are deduced leading to a full factorial design experiment to identify all effects and interactions. The varied similarity parameters are the circumferential Reynolds number, the non-dimensional mass flow, the non-dimensional spacing between rotor and stator, and the jet incidence angle. The range of the varied similarity parameters covers engine oriented operating conditions and is therefore suitable to predict Nusselt numbers in the actual engine component. In order to estimate measurement uncertainties, a simplified model of the test specimen, consisting of a convectively cooled flat plate, has been derived. Uncertainties of the measured quantities and derived properties are discussed by means of a linear pr ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000082548
Veröffentlicht am 04.05.2018
Zugehörige Institution(en) am KIT Institut für Thermische Strömungsmaschinen (ITS)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2226-4310
urn:nbn:de:swb:90-825489
KITopen-ID: 1000082548
Erschienen in Aerospace
Band 5
Heft 2
Seiten Article: 51
Vorab online veröffentlicht am 01.05.2018
Schlagworte jet engines; rotor-stator systems; heat transfer; nusselt number correlation; multivariate regression; statistical modeling
Nachgewiesen in Scopus
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