Abstract
The compressor adiabatic performance map is important for turbocharger matching with engine. Its accuracy was affected by the heat transfer phenomenon in the turbocharger. The corrected method for compressor performance measurement which affected by heat transfer was widely investigated by some authors. The aim of this work was to measure compressor adiabatic efficiency by simplified method, and estimated the effects of internal heat transfer on compressor efficiency. This approach only added five temperature sensors on the turbocharger based on the standard instruments and doesn’t need other special instruments, and the heat transfer properties of turbocharger and compressor adiabatic efficiency could be calculated by lumped model. This method was validated by other experiments. Finally, the heat absorbed by compressor under different operating conditions was analyzed by this method. The results showed water-cooling was main influenced factor, and water-cooling was a barrier for heat transfer from turbine to compressor.
Highlights
Turbocharger plays an dominant part in emission and energy reduction of road vehicles
The aim of this work was to measure compressor adiabatic efficiency by simplified method, and estimated the effects of internal heat transfer on compressor efficiency. This approach only added five temperature sensors on the turbocharger based on the standard instruments and doesn't need other special instruments, and the heat transfer properties of turbocharger and compressor adiabatic efficiency could be calculated by lumped model
In order to evaluated the effects of heat transfer in the turbocharger, the section of experimental results will be make comparing for results with or without water cooling
Summary
Turbocharger plays an dominant part in emission and energy reduction of road vehicles. The efficiency of compressor which was measured at standard test bench is not exacted due to heat transfer in turbocharger [1]. The traditional way to calculate the compressor efficiency, based on a ratio of adiabatic and actual of compressor enthalpy from measurements of a test-bench showed in Eq., the detailed about Eq. was presented in the reference [1], provides inaccurate results. This inaccuracy comes from the no consideration of heat fluxes effect in the turbocharger [1]. In order to corrected results of measured, a lot of experts and scholars did a great deal of researches for behavior of turbocharger heat transfer in the last few decades [2]
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