Characteristics of Radial Inward Turbines for Exhaust Gas Turbochargers under Nonsteady Flow Conditions : Effects of Waveforms on Prediction of Turbine Performance
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概要
- 論文の詳細を見る
This paper deals with effects of waveforms on predicting performance of a radial turbine for turbochargers under pulsating flows. The extensive unsteady tests were conducted with several pulse shapes and pressure amplitudes over a pulse frequency range from 10 to 70Hz produced by a disk-type pulse generator rig. Five kinds of pulse shapes were simulated for exhaust gas flows from diesel engines. The time-mean method and the quasi-steady flow analysis were carried out to predict the turbine characteristics by using the steady flow turbine performance. As the results, the following points were clarified. For most conditions, the quasi-steady flow analysis of turbine performance is valid even if the turbine is affected by the waveform, amplitude and frequency. It is considered that the turbine under pulsating flow conditions works along the curves of steady flow performance except for windage states. The timemean method predicts the power output fairly well, but grossly overestimates the mass flow rates for some waveforms.
- 一般社団法人日本機械学会の論文
- 1992-05-15
著者
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YOSHIKI Haruo
Institute of Industrial Science, Univ. of Tokyo
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Yoshiki Haruo
Institute Of Industrial Science The University Of Tokyo
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KONISHI Keiji
Department of Electrical and Electronic Systems, College of Engineering, University of Osaka Prefect
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Konishi Keiji
Department Of Electrical And Electronic Systems College Of Engineering University Of Osaka Prefectur
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Konishi Keiji
Department Of Mechanical System Engineering Tokyo Metropolitan Institute Of Technology
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