High Performance Komatsu KTR150 Turbocharger

Yamaguchi, Hiromasa; Nishiyama, Toshihiko; Horiai, Kunio; Kasuya, Tamotsu

doi:10.4271/840019

Cited by 11 publications

(7 citation statements)

References 5 publications

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“…Baines et al (1978) have tested two mixed flow turbines for turbocharger applications with positive blade angles. They concluded that the mixed flow configuration had a lower tip speed for best efficiency and increased swallowing capacity than an equivalent radial-inflow turbine, in agreement with other investigations (Yamaguchi et al, 1982;Naguib, 1986;Cheng and Gibbs, 1989). In general, efficiencies seem to be a few percentage points higher than comparable radial-inflow turbines and, in addition, peak at lower U/C.…”

Section: Introductionsupporting

confidence: 82%

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Performance of a Mixed Flow Turbocharger Turbine Under Pulsating Flow Conditions

Arcoumanis

Hakeem

Khezzar

et al. 1995

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery

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The performance of a high pressure ratio (P.R.=2.9) mixed flow turbine for an automotive turbocharger has been investigated and the results revealed its better performance relative to a radial-inflow geometry under both steady and pulsating flow conditions. The advantages offered by the constant blade angle rotor allow better turbocharger-engine matching and maximization of the energy extracted from the pulsating engine exhaust gases. In particular, the mixed inlet blade geometry resulted in high efficiency at high expansion ratios where the engine-exhaust pulse energy is maximum. The efficiency characteristics of the mixed flow turbine under steady conditions were found to be fairly uniform when plotted against the velocity ratio, with a peak efficiency at the design speed of 0.75. The unsteady performance as indicated by the mass-averaged total-to-static efficiency and the swallowing capacity exhibited a departure from the quasi-steady assumption which is analysed and discussed.

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Section: Introductionsupporting

confidence: 82%

“…The idea of a mixed-flow turbine is not entirely new, and such developments have been described elsewhere (Baines et al, 1978;Yamaguchi et al, 1982;Naguib, 1986;Cheng and Gibbs, 1989). However, limited consideration has been given to the potential for modifying the turbine characteristics to improve engine matching.…”

Section: Introductionmentioning

confidence: 99%

Performance of a Mixed Flow Turbocharger Turbine Under Pulsating Flow Conditions

Arcoumanis

Hakeem

Khezzar

et al. 1995

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery

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“…8) summarizes the percentage increase in total-to-static efficiency of turbine B with new volute relative to old one. The reason for this feature is that the new volute has larger swallowing capacity than the old volute [7]. The results with the new volute, see Fig.…”

Section: Effect Of Volutementioning

confidence: 90%

“…The idea of a mixed-flow turbine is not entirely new, and such developments have been described in the literature [5]. However, mixed-flow turbines for use in automotive turbochargers have been considered fairly recently and only a few publications are available regarding their design, manufacture, steadyflow characteristics, and comparison with equivalent radial-inflow turbines [1,[6][7][8][9][10][11][12][13]. In addition, limited consideration has been given to the potential for modifying the turbine characteristics to improve turbocharger/engine matching, which requires testing of the rotor under pulsating flow conditions [2].…”

Section: Introductionmentioning

confidence: 99%

Effect of volute geometry on the steady and unsteady performance of mixed-flow turbines

Hakeem

Costall

et al. 2007

Proceedings of the Institution of Mechanical Engineers, Part A:

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The steady and unsteady performance of two mixed-flow turbocharger turbine rotors has been investigated. These rotors differ mainly in their inlet blade angle geometry; one has a constant blade angle (rotor A) and the other a notionally constant incidence angle (rotor B). The results indicate that the constant blade inlet angle design offers improved efficiency characteristics over the constant incidence one with total-to-static efficiency at the design point ranging between 0.7 and 0.76. A detailed assessment of the influence of volute geometry on the turbine performance has been carried out, which confirmed that the geometry of volute plays a critical role in the overall performance of a turbine. The unsteady performance tests have indicated a substantial deviation from the performance and flow characteristics of equivalent steady-state tests, which is quantified and discussed.

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“…Wallace and Blair [24] reported the earliest experimental study of the irregular flow effect on mixed inflow turbine performance. Yamaguchi et al [25] analyzed four rotors of mixed inflow turbines having different camber curves. Ketata et al [26] studied a Mixed Flow Turbine Volute numerically Operating in Various Steady Flow Conditions.…”

Section: Literature Reviewmentioning

confidence: 99%

Analysis of the Three-Dimensional Accelerating Flow in A Mixed Turbine Rotor

Chelabi¹,

Basova²,

Hamidou³

et al. 2021

JES

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An investigation on new rotor blade designs conceived to produce higher exit relative kinetic energy of a mixed flow turbine is undertaken. Accelerating the flow through the rotor in a relative frame of reference improves energy transfer to the shaft, which is only produced in a rotating rotor. A three-dimensional converging rotor channel might respond to the analysis requirements in the subsonic flow regimes. Effectively, the machine experiences a 3.71 % and 3.67 % increase in work output and efficiency, respectively, representing this study’s primary intent. This has been accomplished by varying the shroud profile to a lesser eye tip diameter, then the hub profile to a larger eye root diameter. At last, both shroud and hub profiles are varied. It appears possible to enhance the performance of the rotor in terms of optimum work done and efficiency by devising suitable blade geometry designs. ANSYS CFX 15 is the code of all simulation works.

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High Performance Komatsu KTR150 Turbocharger

Cited by 11 publications

References 5 publications

Performance of a Mixed Flow Turbocharger Turbine Under Pulsating Flow Conditions

Performance of a Mixed Flow Turbocharger Turbine Under Pulsating Flow Conditions

Effect of volute geometry on the steady and unsteady performance of mixed-flow turbines

Analysis of the Three-Dimensional Accelerating Flow in A Mixed Turbine Rotor

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