Journal ArticleDOI
Surge Dynamics in a Free-Spool Centrifugal Compressor System
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TLDR
In this paper, a radial impeller-vaneless diffuser free-spool system was used to investigate turbocharger surge in the presence of a volute at the inducer tip, and two very different compression systems were employed to examine stall initiation phenomena as well as the behavior of the compressor characteristics when operating in surge.Abstract:
Turbocharger surge has been investigated in a radial impeller-vaneless diffuser free-spool system. Several different aspects are addressed. First, two very different compression systems, one with a large downstram volume and one with the smallest possible downstram voluem, are employed to examine stall initiation phenomena as well as the behavior of the compressor characteristics when operating in surge. The measurements show impeller stall at the inducer tips to be a key phenomena in initiating surge. The inducer stall is stationary and asymmetric, due to the presence of the volute, and is most severe near the volute tongue angular positionread more
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Diesel Engine Transient Operation
TL;DR: The first € price and the £ and $ price are net prices, subject to local VAT as discussed by the authors, and they are subject to change without notice. All errors and omissions excepted.
Journal ArticleDOI
Centrifugal compressor surge and speed control
Jan Tommy Gravdahl,Olav Egeland +1 more
TL;DR: A low-order centrifugal compressor model is presented, where the states are mass flow, pressure rise, and rotational speed of the spool, and Semiglobal exponential stability is proved using a Lyapunov argument.
Proceedings ArticleDOI
Rotating stall and surge control: a survey
TL;DR: In this article, the authors present an analysis of the current state of the art in the control of aero- or hydrodynamic instabilities in turbomachines, and discuss methods devised to prevent these instabilities occuring, but concentrates mainly on the active control of the unstable flows.
Journal ArticleDOI
Surge limit definition in a specific test bench for the characterization of automotive turbochargers
TL;DR: A mathematical tool has been developed for marking out surge operation points from stable compressor points based on the frequency domain analysis of the instantaneous variables measured in the centrifugal compressor.
Journal ArticleDOI
Experiments and modelling of surge in small centrifugal compressor for automotive engines
TL;DR: In this article, the surge phenomenon in small centrifugal compressors used for turbocharging internal combustion engines is analyzed, based on the introduction of a fluid inertia term that accounts for the non quasi steady effects and the use of a compressor map extended to the surge and negative flows zone.
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