In this study, the performance of a turbocharger compressor system for light-duty diesels, encompassing the airflow geometry from impeller inlet to volute exit, has been simulated numerically, and the effects of variable diffuser vane angles on the compressor performance and operating range have been investigated. It is found that the angle of the diffuser vane has significant influence on the compressor operating range, and optimized design of the variable diffuser vane angle can increase the stable operating range and improve the compressor efficiency significantly when compared with fixed diffuser vane angles and vaneless designs. However, changing the diffuser vane angle alone may not achieve the full control of the operating range of a compressor desired. Other technologies (e.g. variable inlet guide vanes, casing treatment, or optimum impeller design) may also be necessary to achieve the widest operating range required.
MohtarH.ChesseP.YammineA.HetetJ. F.‘Variable inlet guide vanes in a turbocharger centrifugal compressor: local and global study.’ SAE paper 2008-01-0301, 2008.
2.
KindlH. M.SchornN. A.SchulteH.SerranoJ. R.MargotX.DonareJ. C.‘Influence of various compressor inlet designs on compressor performance.’ Technical reports SRR-2004–0151, Ford Research and Advanced Engineering, 2004.
3.
UchidaH.KashimotoA.IwakiriY.‘Development of wide flow range compressor with variable inlet guide vane.’R&D Rev. Toyota CRDL41 (3) (2006): 9–14.
4.
GalindoJ.SerranoJ. R.MargotX.TiseiraA.SchornN.KindlH.‘Potential of flow pre-swirl at the compressor inlet of automotive engine turbochargers to enlarge surge margin and overcome packaging limitations.’Int. J. Heat Fluid Flow28 (2007): 374–387.
5.
MacekJ.VitekO.‘Simulation of pulsating flow unsteady operation of a turbocharger radial turbine.’ SAE paper 2008-01-0295, 2008.
6.
BensonR. S.WhitfieldA.‘An experimental investigation of the non-steady flow characteristics of a centrifugal compressor.’Proc. Instn Mech. Engrs180 (1966): 641–671.
7.
HunzikerR.DickmannH. P.EmmrichR.‘Numerical and experimental investigation of a centrifugal compressor with an inducer casing bleed system.’Proc. IMechE: J. Power and Energy215 (2001): 783–791 DOI: 10.1243/0957650011538910.
8.
IwakiriY.UchidaH.‘Numerical fluid analysis of a variable geometry compressor for use in a turbocharger.’R&D Rev. Toyota CRDL41 (3) (2006): 15–20.
9.
JiangP. M.WhitfieldA.‘Investigation of vaned diffusers as a variable geometry device for application to turbocharger compressors.’Proc. IMechE: J. Automobile Engineering206 (1992): 209–220 DOI: 10.1243/PIME_PROC_1992_206_179_02.
10.
EngedaA.‘Experimental and numerical investigation of the performance of a 240-kW centrifugal compressor with different diffusers.’Expl Thermal Fluid Sci.28 (2003): 55–72.
11.
UchidaH.‘Transient performance prediction for turbocharging systems incorporating variable-geometry turbochargers.’R&D Rev. Toyota CRDL41 (3) (2006): 22–28.
12.
GriffithR. C.‘Series turbocharging for the caterpillar heavy-duty on-highway truck engines with ACERT technology.’ SAE paper 2007-01-1561, 2007.
13.
UchidaH.‘Trend of turbocharging technologies.’R&D Rev. of Toyota CRDL41 (3) (2006): 1–8.
14.
SorokesJ. M.‘Variable vane height diffuser.’ US Pat. 4932835, 1990.
15.
McauliffeC.HarrisM. L.MerrittB.StruziakR.‘Variable area diffuser vane geometry.’ US Pat. 7140839, 2006.
GuoQ.ChenH.ZhuX. C.DuZ. H.ZhaoY.‘Numerical simulations of stall inside a centrifugal compressor.’Proc. IMechE: J. Power and Energy221 (2007): 683–693 DOI: 10.1243/09576509JPE417.
18.
BeniniE.ToffoloA.LazzarettoA.‘Experimental and numerical analyses to enhance the performance of a microturbine diffuser.’Expl Thermal Fluid Sci.30 (2006): 427–440.
19.
DickmannH. P.WimmelT. S.SzwedowiczJ.FilsingerD.RodunerC. H.‘Unsteady flow in a turbocharger centrifugal compressor: three-dimensional computational fluid dynamics simulation and numerical and experimental analysis of impeller blade vibration.’J. Turbomachinery128 (2006): 455–465.
20.
JiaoK.SunH.LiX.WuH.KrivitzkyE.SchramT.LarosiliereL. M.‘Numerical simulation of air flow through turbocharger compressors with dual volute design.’Appl. Energy86 (2009): 2494–2506.
21.
MarconciniM.RubechiniF.ArnoneA.IbarakiS.‘Numerical investigation of a transonic centrifugal compressor.’J. Turbomachinery130 (2008): 011010-1-011010–9.
22.
AghaeitogR.TousiA. M.TouraniA.‘Comparison of turbulence methods in CFD analysis of compressible flows in radial turbomachines.’Aircr. Engng Aerospace Technol.80 (2008): 657–665.
23.
SmirnovP. E.HansenT.MenterF. R.‘Numerical simulation of turbulent flows in centrifugal compressor stages with different radial gaps.’ In Proceedings of the ASME Turbo Expo 2007 onPower for land, sea and air (GT2007), Montreal, Quebec, Canada, 14–17 May 2007, ASME paper GT 2007–27376.
