Turbocharger surge behavior for sudden valve closing downstream the compressor and effect of actuating variable nozzle turbine

Danlos, Amélie; Podevin, Pierre; Deligant, Michaël; Clenci, Adrian; Punov, Plamen; Guilain, Stéphane

doi:10.1088/1755-1315/960/1/012013

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…16 Some works about surge detection and behavior of turbochargers can be found in References 17-19. [17][18][19] In this study, two counter and co-rotating centrifugal compressors (CRCCs) using a front (FR) and rear (RR) rotors rotating in opposite and in the same direction are presented. It is in fact the second part of the already published work [20][21][22] but focusing only on the active control method to enlarge the map width toward very low mass flow rates by suppressing the instabilities.…”

Section: Introductionmentioning

confidence: 99%

A novel experimental control method to suppress instability in a centrifugal compressor with two counter and co-rotating rotors

Abed¹,

Nguyen

Khelladi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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The use of a counter-rotating rotor in turbomachines can be a solution to improve performances by allowing reduction in size and weight, especially compared to multistage configuration. The present study aims are to demonstrate another advantage of the counter-rotating rotors: their application to expand the operating range of centrifugal compressors toward extremely low flow rates based on an active control method. This method was performed on two different counter-rotating configurations. The principle of the active control method is to adjust independently the rotation speed of each rotor to push back the instability appearance. Experimental results show that reducing the rotation speed of the upstream-rotor while fixing the speed of the downstream rotor can push the instability phenomenon toward a lower mass flow rate while decreasing the pressure rise and efficiency. Co-rotating mode is applied to push further the stable region toward low mass flow rates allowing a significant extension of the operating range. The experimental results reveal that the map width is shifted by about 50% over the studied range toward a lower mass flow rate for both counter-rotating centrifugal compressors when using the control method. This can be achieved when the absolute value of the upstream-rotor speed is within the range of 48%–61% of the rotational speed of the downstream rotor.

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Section: Introductionmentioning

confidence: 99%

A novel experimental control method to suppress instability in a centrifugal compressor with two counter and co-rotating rotors

Abed¹,

Nguyen

Khelladi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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Experimental Investigations of Centrifugal Compressor Surge Noise

Zhao

Zhou

Yang

2023

Journal of Turbomachinery

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Surge is a crucial problem for achieving a good working range of a centrifugal compressor and power cycle safety. Effective and early detection of surge inception is essential to predict and avoid the onset of it. In this paper, experiments have been conducted to investigate the pressure and acoustic characteristics of the centrifugal compressor surge. The compressor prototype used the research consists of an impeller wheel having backward blades, a vaneless diffuser, and a downstream volute constitute. The compressor prototype was instrumented with steady sensors to characterize the performance map, a fast dynamic pressure sensor to measure the surge-induced pressure fluctuation, and thirteen microphones to record the acoustic pressure on the inlet wall and in far field. The transient experimental data were analyzed in time and frequency domains. The surging noise is identified as a chord sound from multiple sources that radiate acoustic impulse synchronously at the compression system surge frequency (below 10 Hz in the current experiment). A previously rarely discussed surge inception is identified from the acoustic spectrogram within the frequency range of 30-85Hz, in which increase of the SPL is detected before the mass flow rate achieves the surge point. The pressure fluctuation corresponding to the inception is too weak to be captured by the normally used dynamic pressure sensors. It suggests that the acoustic measurement may have advantages in surge inception detection and surge prediction.

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Turbocharger surge behavior for sudden valve closing downstream the compressor and effect of actuating variable nozzle turbine

Cited by 2 publications

References 16 publications

A novel experimental control method to suppress instability in a centrifugal compressor with two counter and co-rotating rotors

A novel experimental control method to suppress instability in a centrifugal compressor with two counter and co-rotating rotors

Experimental Investigations of Centrifugal Compressor Surge Noise

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