Admission Effects on the Flow Behaviour of a Double Entry Turbocharger Turbine
Publish place: Automotive Science and Engineering، Vol: 8، Issue: 4
Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJAEIU-8-4_001
تاریخ نمایه سازی: 4 دی 1402
Abstract:
Dual turbocharger turbine is fed by an unequal out-of-phase mass flow charge almost all the time which have significant effects on its performance parameters and flow phenomena which are not well known. Besides fully understanding the flow behavior in the radial turbine suffers from lack of detailed information about the secondary flows. This article studies the secondary flow structure within a dual entry turbine in different admission conditions. Results showed that with increasing the inequality of pressure ratio in the entries, performance of the turbine significantly decrease. From the results a profoundly disturbed flow in the interspace region was recognized. The pressure distribution of each limb shows some dependency between entries. To fully understand the flow physics, the ۳D computational fluid dynamics (CFD) was implemented and compared with the experimental results of Copeland et al. (۲۰۱۰). The results are used to study the physical origin and the effect of nonuniform mass flow on secondary vortices. The generation and the development of the inflow, horseshoe and the corner vortex was investigated by evaluating contour plot of velocity distribution. Results demonstrated that the inflow vortex is due to the asymmetrical flow into the passage from the volute.
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Authors
Mohammad Hasan Shojaeefard
Professor, School of Automotive Engineeringt, Iran University of Science and Technology
Azadeh Sajedin
Iran University of Science and Technology
Abolfazl Khalkhali
Assistant Professor, School of Automotive Engineeringt, Iran University of Science and Technology
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