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

Jaewoo Chung, Siwon Lee, Namho Kim, Beumho Lee, Deokjin Kim, Seunghyun Choi and Giyong Kim
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Jaewoo Chung: Eco-friendly Vehicle R&D Division, Korea Automotive Technology Institute, Chungnam 31214, Korea
Siwon Lee: Eco-friendly Vehicle R&D Division, Korea Automotive Technology Institute, Chungnam 31214, Korea
Namho Kim: Eco-friendly Vehicle R&D Division, Korea Automotive Technology Institute, Chungnam 31214, Korea
Beumho Lee: Eco-friendly Vehicle R&D Division, Korea Automotive Technology Institute, Chungnam 31214, Korea
Deokjin Kim: Eco-friendly Vehicle R&D Division, Korea Automotive Technology Institute, Chungnam 31214, Korea
Seunghyun Choi: Eco-friendly Vehicle R&D Division, Korea Automotive Technology Institute, Chungnam 31214, Korea
Giyong Kim: Advanced Development Team, Keyyang precision Co. LTD, Gyeongsangbuk 39537, Korea

Energies, 2019, vol. 12, issue 20, 1-20

Abstract: 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.

Keywords: turbocharger; turbine; reduced turbine mass flow rate; turbine inlet temperature; turbine outlet pressure; correction (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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