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http://dx.doi.org/10.5762/KAIS.2019.20.12.723

Mass Flow Rate Measurement of Pulsating Flow in a Twin-Scroll Turbocharger  

Chung, Jin-Eun (Dept. of Mechanical Engineering, Korea Univ. of Technology and Education)
Jeon, Se-Hun (Dept. of Mechanical Engineering, Graduate School, Korea Univ. of Technology and Education)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.20, no.12, 2019 , pp. 723-729 More about this Journal
Abstract
Turbochargers are an effective device to reduce the fuel consumption. In this study, the mass flow rate of pulsating flow in the twin-scroll turbocharger for the gasoline engine of passenger vehicles was measured. Pulsating flow was achieved using a pulse generator and the mass flow rate of the unsteady pulsating flow was analyzed by comparing it with those of the steady flow. The pulse generator consisted of a rotating upper plate and a fixed lower plate. To measure the mass flow rate of unsteady flow, the orifice flow meter equipped with the difference pressure transducer was used. To analyze the low speed performance of the turbocharger, the measurement was carried out in the speed of turbocharger from 60,000rpm to 100,000rpm. The mass flow parameters of the unsteady pulsating flow showed a large difference compared to those of the steady flow. Those of the unsteady flow showed the hysteresis loop surrounding the mass flow parameters of the steady flow and the maximum variation of the mass flow parameters were 5.0 times those of the steady flow. This phenomenon is the result of the filling and emptying the turbine volute space due to pulsating flow.
Keywords
Turbocharger; Twin-Scroll; Pulsating Flow; Unsteady Flow; Mass Flow Rate;
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