Abstract
The paper analyses the influence of aero-thermal inter-stage phenomena on the performance prediction of two-stage sequential turbocharging systems. A novel methodology to measure performance of two-stage turbocharging systems into equivalent maps has been implemented and detailed. Investigation of a two-stage sequential turbocharging system has been performed in a steady turbocharger gas-stand, obtaining thermodynamic properties of the complete turbocharging system. The measurement of equivalent maps and the combination of stand-alone HP and LP turbochargers maps have led to the quantification of inter-stage effects and the influence on performance predictions of the two-stage systems.
In this study, equivalent two-stage and combined HP and LP stand-alone maps are compared in order to quantify the variation of performance affecting the two-stage system. Specifically, a simplified 1D model of the two-stage system flow path is developed for the investigation. In order to quantify the influence of inter-stage effects, heat correction of the diabatic compressor and turbine maps has been implemented. In conclusion, in comparison to equivalent two-stage maps, combined stand-alone maps predict a significantly higher pressure ratio and efficiency for the compressor system at conditions of low equivalent speed, while the turbine net efficiency is missed by about 10% at elevated corrected mass flow operations.
In this study, equivalent two-stage and combined HP and LP stand-alone maps are compared in order to quantify the variation of performance affecting the two-stage system. Specifically, a simplified 1D model of the two-stage system flow path is developed for the investigation. In order to quantify the influence of inter-stage effects, heat correction of the diabatic compressor and turbine maps has been implemented. In conclusion, in comparison to equivalent two-stage maps, combined stand-alone maps predict a significantly higher pressure ratio and efficiency for the compressor system at conditions of low equivalent speed, while the turbine net efficiency is missed by about 10% at elevated corrected mass flow operations.
Original language | English |
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Pages (from-to) | 743-756 |
Journal | Energy |
Volume | 134 |
Early online date | 12 Jun 2017 |
DOIs | |
Publication status | Published - 1 Sept 2017 |
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Dive into the research topics of 'Effect of inter-stage phenomena on the performance prediction of two-stage turbocharging systems'. Together they form a unique fingerprint.Profiles
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Chris Brace
- Department of Mechanical Engineering - Professor
- EPSRC Centre for Doctoral Training in Statistical Applied Mathematics (SAMBa)
- Institute for Advanced Automotive Propulsion Systems (IAAPS)
- Smart Warehousing and Logistics Systems
- Made Smarter Innovation: Centre for People-Led Digitalisation
- EPSRC Centre for Doctoral Training in Advanced Automotive Propulsion Systems (AAPS CDT)
Person: Research & Teaching, Core staff, Affiliate staff
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Richard Burke, FIMechE
- Department of Mechanical Engineering - Professor
- Institute for Policy Research (IPR)
- Institute for Advanced Automotive Propulsion Systems (IAAPS) - Centre Director
- Made Smarter Innovation: Centre for People-Led Digitalisation
- EPSRC Centre for Doctoral Training in Advanced Automotive Propulsion Systems (AAPS CDT)
Person: Research & Teaching, Core staff, Affiliate staff