The Radial Turbine for Small Turbocharger Applications: Evolution and Analytical Methods for Twin-Entry Turbine Turbochargers

Schorn, N.

doi:10.4271/2014-01-1647

Cited by 29 publications

(26 citation statements)

References 8 publications

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“…In many cases, the performance characteristics of the turbocharger used in a simulation are obtained from a performance test using standardized hot gas bench test conditions [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, since the compressor and the turbine are connected by a single shaft, a problem exists in which the operation range of the turbine is limited according to the surge and choke limitations of the compressor [5].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, various methods for expanding the turbine operating range have been provided [9,10], and a closed loop test method has been proposed to avoid the surge and choking areas on the compressor side to expand the turbine expansion ratio range [5].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Effect of Turbine Inlet Temperature and Backpressure Conditions on Reduced Turbine Flow Rate Performance Characteristics and Correction Method for Automotive Turbocharger

et al. 2019

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In actual vehicle operation, the turbocharger turbine operates at various temperatures, inlet, and backpressure conditions, unlike compressors. The flow rate characteristics of the turbine are generally evaluated under certain conditions using an assembled turbocharger with a compressor and a turbine and a hot gas bench from the turbocharger manufacturer. Flow rate characteristics are also presented as the reduced mass flow rate to correct the flow rate characteristics according to the turbine inlet temperature and pressure. Therefore, the turbine mass flow rate seen in many engine development cases and studies—including the analysis of the turbine performance and characteristics, engine model configuration, and matching of the engine and turbocharger—is calculated according to the reduced turbine mass flow rate performance and turbine inlet temperature and pressure obtained through hot gas bench experiments under certain conditions. However, the performance of the reduced turbine mass flow rate is influenced by the compressor power conditions, and additional correction of the reduced turbine mass flow rate is required when the turbine inlet temperature and turbine backpressure differ from the reference test conditions, such as the hot gas bench test conditions. In this study, the effect of the turbine inlet temperature and turbine backpressure on the performance of the reduced turbine mass flow rate were examined based on the power balance relationship between the compressor and turbine of an automotive turbocharger. The principle of its correction is also presented.

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“…In many cases, the performance characteristics of the turbocharger used in a simulation are obtained from a performance test using standardized hot gas bench test conditions [5,6].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on the Effect of Turbine Inlet Temperature and Backpressure Conditions on Reduced Turbine Flow Rate Performance Characteristics and Correction Method for Automotive Turbocharger

et al. 2019

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“…Therefore, an accurate evaluation of turbocharger performance, and the matching and control of a turbocharger using an engine model have become more important [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…The New European Driving Cycle (NEDC) shows that the engine operation point along the test cycle are at the lowest part load range of the engine map [3] and Schorn [5]. Serrano [7] and Nakhjiri [9] suggest increased distortion of efficiency results within about 40-50% of the maximum speed of the turbocharger.…”

Section: Introductionmentioning

confidence: 99%

An Investigation on the Efficiency Correction Method of the Turbocharger at Low Speed

Chung

Kim

et al. 2018

Energies

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Abstract:The heat transfer in the turbocharger occurs due to the temperature difference between the exhaust gas and intake air, coolant, and oil. This heat transfer causes the efficiency of the compressor and turbine to be distorted, which is known to be exacerbated during low rotational speeds. Thus, this study proposes a method to mitigate the distortion of the test result data caused by heat transfer in the turbocharger. With this method, the representative compressor temperature is defined and the heat transfer rate of the compressor is calculated by considering the effect of the oil and turbine inlet temperatures at low rotation speeds, when the cold and the hot gas test are simultaneously performed. The correction of compressor efficiency, depending on the turbine inlet temperature, was performed through both hot and cold gas tests and the results showed a maximum of 16% error prior to correction and a maximum of 3% error after the correction. In addition, it shows that it is possible to correct the efficiency distortion of the turbocharger by heat transfer by correcting to the combined turbine efficiency based on the corrected compressor efficiency.

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Performance Improvement of the Pressure Ratio and Rotational Speed Calculation of a Centrifugal Compressor Model

Chung

Kim

Lee

et al. 2020

Int.J Automot. Technol.

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The Radial Turbine for Small Turbocharger Applications: Evolution and Analytical Methods for Twin-Entry Turbine Turbochargers

Cited by 29 publications

References 8 publications

Study on the Effect of Turbine Inlet Temperature and Backpressure Conditions on Reduced Turbine Flow Rate Performance Characteristics and Correction Method for Automotive Turbocharger

Study on the Effect of Turbine Inlet Temperature and Backpressure Conditions on Reduced Turbine Flow Rate Performance Characteristics and Correction Method for Automotive Turbocharger

An Investigation on the Efficiency Correction Method of the Turbocharger at Low Speed

Performance Improvement of the Pressure Ratio and Rotational Speed Calculation of a Centrifugal Compressor Model

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