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Aerodynamic Optimization of a Two-Part Variable Inlet Guide Vane in a Highly Loaded Low Pressure Compressor

Hemmert-Pottmann, Stefan und Gouezou, William und Nicke, Eberhard (2018) Aerodynamic Optimization of a Two-Part Variable Inlet Guide Vane in a Highly Loaded Low Pressure Compressor. In: Proceedings of the ASME Turbo Expo. American Society of Mechanical Engineers. ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, 2018-06-11 - 2018-06-15, Lillestrøm (Oslo), Norway. doi: 10.1115/GT2018-75489.

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Kurzfassung

Continuous reduction of fuel consumption for a wide range of operating conditions leads to a high efficiency demand for all engine parts of modern jet engines and especially the compressor. To meet these requirements a two-part Variable Inlet Guide Vane (VIGV), composed of a fixed strut and a variable flap, can be used. Besides the aerodynamic aspects, the VIGV strut is a substantial part for the structural integrity of the compressor. The aerodynamic design optimization of such a VIGV, located upstream of the first rotor of a 2.5 stage low pressure compressor, under the conditions of three different operating points is presented in this paper. In a previous study the shape of the axial gap between strut and flap was optimized without changing the envelope of both parts [1]. The new design tool SplitBlade, developed at the DLR, enables the creation of an axial gap and has been integrated in the design process of the in-house optimization tool AutoOpti. The target of the optimization was to decrease the total pressure loss coefficients for all three operating points. The design optimization presented in this paper is more complex by allowing the VIGV blade geometry to change. The basic dimensions of the VIGV such as the axial chord and the maximum profile thickness are still frozen. In total, 88 parameters are free to change in the optimization process. Additionally to the main target of loss reduction, the circumferential outflow angles are restricted to maintain the deflection of the blade and therewith the required rotor inflow conditions to ensure the operability of the entire compressor in the whole working range. The final result is a two-part VIGV with an axial gap, which is optimized in terms of total pressure losses in three operating points. Compared to a reference geometry without an axial gap, the losses are almost equal at nominal speed, and about one to two percentage points higher in the two part speed operating points.

elib-URL des Eintrags:https://elib.dlr.de/120642/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Aerodynamic Optimization of a Two-Part Variable Inlet Guide Vane in a Highly Loaded Low Pressure Compressor
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Hemmert-Pottmann, Stefanstefan.hemmert-pottmann (at) dlr.dehttps://orcid.org/0000-0003-1397-750XNICHT SPEZIFIZIERT
Gouezou, Williamwilliam.gouezou (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Nicke, Eberhardeberhard.nicke (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Juni 2018
Erschienen in:Proceedings of the ASME Turbo Expo
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
DOI:10.1115/GT2018-75489
Verlag:American Society of Mechanical Engineers
Status:veröffentlicht
Stichwörter:axial compressor, design optimization, variable inlet guide vane, two-part VIGV
Veranstaltungstitel:ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition
Veranstaltungsort:Lillestrøm (Oslo), Norway
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:11 Juni 2018
Veranstaltungsende:15 Juni 2018
Veranstalter :ASME International Gas Turbine Institute
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Antriebssysteme
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ER - Engine Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Verdichtertechnologien (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Antriebstechnik > Fan- und Verdichter
Hinterlegt von: Pottmann, Stefan
Hinterlegt am:26 Jun 2018 14:33
Letzte Änderung:24 Apr 2024 20:24

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