Unsteady Simulation of Six-Inlet Pulsed-Flow Turbocharger Turbine

Kozak, Dariusz; Mazuro, Paweł

doi:10.4271/2020-01-2237

Cited by 1 publication

(5 citation statements)

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“…The efficiency values of the two-stage system were higher than those in the singlestage system [25]. The average efficiency values of the two-stage system were 0.491 for the 40,000 rpm, 0.496 for the 50,000 rpm and 0.504 for the 60,000 rpm case.…”

Section: Resultsmentioning

confidence: 75%

“…The average efficiency values of the two-stage system were 0.491 for the Figure 18 shows the total-static efficiency of the complete two-stage system compared to the efficiency of the single-stage system with the same turbine model which was previously presented by the authors in [25]. The efficiency values of the two-stage system were higher than those in the singlestage system [25]. The average efficiency values of the two-stage system were 0.491 for the Figure 18.…”

Section: Resultsmentioning

confidence: 90%

“…A completely different situation was observed for the efficiency values of the second-stage drop. The efficiency of the complete two-stage system can be calculated using the formula below: Figure 18 shows the total-static efficiency of the complete two-stage system compared to the efficiency of the single-stage system with the same turbine model which was previously presented by the authors in [25]. The efficiency values of the two-stage system were higher than those in the singlestage system [25].…”

Section: Resultsmentioning

confidence: 93%

“…Figure 18 shows the total-static efficiency of the complete two-stage system compared to the efficiency of the single-stage system with the same turbine model which was previously presented by the authors in [25].…”

Section: Resultsmentioning

confidence: 99%

“…The efficiency of the complete two-stage system can be calculated using the formula below: Figure 18 shows the total-static efficiency of the complete two-stage system compared to the efficiency of the single-stage system with the same turbine model which was previously presented by the authors in [25]. The efficiency values of the two-stage system were higher than those in the singlestage system [25]. The average efficiency values of the two-stage system were 0.491 for the Figure 18 shows the total-static efficiency of the complete two-stage system compared to the efficiency of the single-stage system with the same turbine model which was previously presented by the authors in [25].…”

Section: Resultsmentioning

confidence: 99%

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Transient Simulation of the Six-Inlet, Two-Stage Radial Turbine under Pulse-Flow Conditions

Kozak

Mazuro

2021

Energies

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In recent years, the automotive sector has been focused on emission reductions using hybrid and electric vehicles. This was mainly caused by political trends promoting “green energy”. However, that does not mean that internal combustion engines (ICEs) should be forgotten. The ICE has still the potential of recovering energy from exhaust gases. One of the promising ways to recover energy is turbocharging. Over the years engine manufacturers have designed very efficient turbocharger systems which have greatly increased the overall engine efficiency. This led to pollutant emission reductions. This paper presents the results of the three-dimensional (3-D) numerical simulations of the two-stage, six-inlet turbocharging system under the influence of unsteady, pulsed-flow conditions. The calculations were carried out for three turbine speeds. The most interesting results of this study were the separation of exhaust gases coming from the six-exhaust pipes and the performance of both stages under pulse-flow conditions. The two-stage turbocharging system was compared against the single-stage turbocharging system and the results showed that the newly designed two-stage turbine system properly separated the exhaust gases of the adjacent exhaust pipes.

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 90%