Contribución a la Mejora del Margen de Bombeo en Compresores Centrífugos de Sobrealimentación

Lang, T. J.; Ricardo, Héctor

doi:10.4995/thesis/10251/12331

Cited by 7 publications

(14 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In any case, the increase of core speed resulting of the reversed flow along the periphery predicted numerically in related investigations [15,43] was observed, and shown to be coherent with the apparent reduction in useful diameter and also with prior temperature measurements.…”

Section: Discussionsupporting

confidence: 77%

See 1 more Smart Citation

Measuring turbocharger compressor inlet backflow through particle image velocimetry

Torregrosa

Broatch

Pastor

et al. 2018

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

An experimental measurement campaign is presented where particle image velocimetry (PIV) was used in an effort to characterize the velocity field in a turbocharger compressor when unstable operating conditions lead to flow reversing from the diffuser into the inlet pipe. Previous studies have successfully used this and similar techniques, but the most relevant results have been obtained in an open compressor where the backflow can diffuse into the ambient. In this work a glass pipe long enough to confine the full extent of the backflow has been used. Advantage was taken from the fact that this backflow is at higher temperature due to the compression process, enabling a preliminary work where a thermocouple array was used to estimate its maximum length across the compressor map. Using these results as a reference both axial and transversal velocity fields were measured. Issues associated with each one are described, along with relevant results that show how the technique correctly identifies the reversed flow, a conclusion that is supported by the comparison of the velocity average and standard deviation profiles with those of measured temperature.

show abstract

Section: Discussionsupporting

confidence: 77%

“…A similar but lower increase can be seen in the work of Fike et al [28] in a single channel of an axial flow fan. Likewise, a similar constriction and acceleration of the flow is correctly predicted by the compressor numerical model developed by Lang [43].…”

Section: Longitudinal Planesupporting

confidence: 65%

Measuring turbocharger compressor inlet backflow through particle image velocimetry

Torregrosa

Broatch

Pastor

et al. 2018

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

show abstract

“…The first array was devised to determine if there existed angular variations of temperature distribution indicating thus the presence of some backflow, and the second one was used to characterize the length of the recirculating backflows for each compressor operating condition. Numerical simulations performed by Lang [17] suggest that backflows extend up to 2 -3 diameters in length, and may occupy over half of the duct radius area. In order to characterize the backflow, Andersen et al [18] selected a distance of half the duct radius for placing several thermocouples in the inlet pipe of the compressor, whereas Figurella et al [19] used thermocouples located in the centre of the pipes and an additional one 14 mm away from the blade tips and protruding 4 mm into the duct.…”

Section: Temperaturementioning

confidence: 99%

Local flow measurements in a turbocharger compressor inlet

Torregrosa

Broatch

Margot

et al. 2017

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

This paper describes an experimental study carried out with the objective of characterizing flow instabilities in turbocharger compressors, specially the distribution of the high-temperature compressed backflow that appears upstream of the impeller at marginal surge conditions. The inlet of a test compressor was fitted with linear and circumferential thermocouple arrays in order to measure the temperature distribution caused by this backflow, whose independence of duct wall temperature was validated through thermographic imaging. Miniaturized pressure probes at the inducer and diffuser showed how pressure spectra varied during the different operating conditions. Induct acoustic intensity was measured in both the inlet and the outlet to investigate the correlation between a known super-synchronous broadband issue known as whoosh noise and the backflow behaviour as characterized by local pressure and temperature. Analysis of the results points to inlet whoosh noise being boosted by this reversed flow but not caused by it, the source probably being located at or downstream of the compressor impeller.

show abstract

“…The effect of particular compressor intake geometries (elbow, tapered duct, reservoir, etc.) has been previously covered by several researchers [16,17,18]. However, they do not usually include the effect of the inlet pipe on compressor acoustic behavior.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Effect of the inlet geometry on performance, surge margin and noise emission of an automotive turbocharger compressor

Galindo

Tiseira

Garcia

et al. 2017

Applied Thermal Engineering

View full text Add to dashboard Cite

Centrifugal compressor performance at low mass flow rates has become an issue in the latest years due to engine downsizing and the increase of low-end torque request. The principal drawback of this operating region is the appearance of the surge phenomenon, which is strongly affected by the compressor inlet geometry. This work is addressed to study the impact of different inlet geometries on the compressor performance, including compressor efficiency, noise emission and surge margin. An engine test bench is set up with a centrifugal compressor and both steady and transient (tip-out) tests are performed in order to obtain a complete view of the influence of each configuration. The results show a clear sensitivity of the compressor parameters to the variations of the geometry upstream the compressor inlet.

show abstract

Contribución a la Mejora del Margen de Bombeo en Compresores Centrífugos de Sobrealimentación

Cited by 7 publications

References 36 publications

Measuring turbocharger compressor inlet backflow through particle image velocimetry

Measuring turbocharger compressor inlet backflow through particle image velocimetry

Local flow measurements in a turbocharger compressor inlet

Effect of the inlet geometry on performance, surge margin and noise emission of an automotive turbocharger compressor

Contact Info

Product

Resources

About