Improved Performance Prediction Model for Turbocharger Compressor
نویسندگان
چکیده
In order to improve centrifugal compressor performance predictive capability, an improved recirculation loss model in two-zone modeling system is presented in this paper. The new loss model correlates Reynolds number of the impeller with the recirculation loss. Performance prediction by the improved model is carried out on two turbochargers with different sizes based on COMPAL mode of the code Concepts. The result shows that predictive performance by improved model is in high accordance with experimental measurement. On the other hand, compared with the larger size compressor, the small one has a performance which is more likely to be influenced by Reynolds number.
منابع مشابه
Experimental study of the effects of repetitive surge condition on turbocharger performance
When the mass flow rate through the compressor is reduced at a constant pressure ratio, mass flow rate will drop to an extent that the complete reversal of flow and surge occurs. Recently many research focuses on turbocharger surge, however, there are not enough investigation on the effect of surge on the performance of the turbocharger. The aim of the paper is to investigate the effect of repe...
متن کاملPerformance Analysis of a Variable Geometry Turbocharger Using Mean Line Method
Turbocharging an engine boosts its power by increasing the amount of input air. This task is accomplished by using the exhaust gas to power a turbine which is engaged with a compressor. The Variable Geometry Turbocharger, VGT is a unique turbocharger that the diffuser vane angle can be changed over a wide range of positions. The mathematics of turbomachinery flow analysis is intensive and uses ...
متن کاملSteady-state modeling of a turbocharger in gasoline engines
The gas flow estimation is crucial for the proper operation and monitoring of turbocharged (TC) engines with a torque structured engine control unit (ECU). This paper presents mean value models developed for modeling gas flow over the compressor, the turbine and the wastegate (WG) in a TC gasoline engine not equipped with a hot film air-mass flow meter (HFM). The turbine flow ...
متن کاملHeat Transfer Analysis in a Turbocharger Turbine: an Experimental and Computational Evaluation
This paper presents the performance of a turbocharger under non-adiabatic conditions in order to assess the impact of heat transfer. A commercial turbocharger was installed on a 2.0 liter diesel engine and measurements were conducted for a range of engine speeds and loads. The test results enabled to assess the impact of the engine on the temperature distribution of the bodies constituting the ...
متن کاملEffect on Vehicle Turbocharger Exhaust Gas Energy Utilization for the Performance of Centrifugal Compressors under Plateau Conditions
Abstract: This paper is focused on the performance of centrifugal compressors for vehicle turbochargers operating at high altitude. The reasons for turbocharged diesel engine power loss increases and bad economy performance caused by exhaust gas energy utilization are investigated. The atmosphere’s impact on the turbocharger centrifugal compressor’s energy distribution characteristics under the...
متن کامل