Radial cOmpresSor Surge INception Investigation

Ziel

Centrifugal compressor stages using vaneless diffusers are known to have a wide operating range. However, when operated outside of this range, instabilities have been reported to commonly develop in the impeller (rotor) or diffuser or both. The unsteady flow phenomena are believed to start from a localized flow separation (stall) that frequently will orbit within the stage at sub-harmonic rotational speeds (rotating stall). If not damped sufficiently the stall cells will eventually develop into more hazardous self-excited pressure oscillations within the entire compressor stage leading to surge phenomena that can induce high aero-elastic loads on the rotor itself leading to premature aging (fatigue) or ultimate failure of the stage. Predicting of the onset of the instabilities is a prerequisite to maintain compressor operating within safe operating margins. Nonetheless the physical understanding and associated modeling of the stall and surge inception is rather limited and mostly restricted to cause-and-effect investigations. With improved computational models being available nowadays more in-depth investigations of the underlying flow physics have become possible, but relies on high quality experimental data for validation.
Following the statement of work put forth in the call for proposal, the first objective of the proposed project is to determine a surge inception scenario for a given academic as well as industrial reference case of centrifugal compressor using vaneless diffuser. Within the proposed project the off-design behavior of each compressor configuration will be investigated both numerically and experimentally, involving time-resolved Kulite array and PIV measurements. Based on this data and on existing theoretical analysis procedures, the second major effort of the present study is devoted to define low-order methodologies that ideally predict the onset of instabilities.

Wissenschaftliches Gebiet

natural sciencesbiological sciencescell biology

Schlüsselbegriffe

Programm/Programme

Thema/Themen

JTI-CS2-2015-CFP02-SYS-02-10 - Analysis of centrifugal compressor instabilities occurring with vaneless diffusor, at low mass flow momentum

Aufforderung zur Vorschlagseinreichung

H2020-CS2-CFP02-2015-01

Andere Projekte für diesen Aufruf anzeigen

Finanzierungsplan

IA - Innovation action

Koordinator

DEUTSCHES ZENTRUM FUR LUFT - UND RAUMFAHRT EV

Netto-EU-Beitrag

€ 747 375,00

Adresse

LINDER HOHE
51147 Koln
Deutschland

Region

Nordrhein-Westfalen Köln Köln, Kreisfreie Stadt

Aktivitätstyp

Research Organisations

Links

Die Organisation kontaktieren Website

Teilnahme an EU-FuI-Programmen

HORIZON-Kooperationsnetzwerk

Gesamtkosten

€ 747 375,00

Beteiligte (1)

STICHTING KONINKLIJK NEDERLANDS LUCHT - EN RUIMTEVAARTCENTRUM

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