Effect of splitters in recirculation channels on performance of turbocharger compressors used in gasoline engines- A CFD study

N. Nithesh, S. Prajwal

Research output: Contribution to journalArticle

Abstract

Turbochargers used in gasoline engines have their compressor outlet directly coupled to the engine inlet via the throttle valve. On sudden closing of the throttle, the compressor outlet is blocked, and the compressed air has no path to exit resulting in a compressor surge. Compressor recirculation valves are used to connect the outlet of the compressor to the inlet to recirculate excess air and thus reduce the compressor surge. Under normal operating conditions, when the valve is closed, the channel connecting the compressor inlet and the valve causes an inlet disturbance resulting in the reduction of compressor efficiency. Hence a steady state CFD analysis of a gasoline engine turbocharger compressor modelled with a recirculation channel at the inlet was conducted. The channel connecting the compressor inlet and the recirculation valve was observed to cause inlet aerodynamic disturbance resulting in a drop in compressor efficiency by 1%. To overcome this problem, splitters were used in recirculation channels and 80% recovery of loss was observed with the use of splitters.

Original languageEnglish
Pages (from-to)6214-6229
Number of pages16
JournalInternational Journal of Automotive and Mechanical Engineering
Volume16
Issue number1
DOIs
Publication statusPublished - 01-01-2019
Externally publishedYes

Fingerprint

Gasoline
Compressors
Computational fluid dynamics
Engines
Surges (fluid)
Plant shutdowns
Compressed air
Aerodynamics
Recovery
Air

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Mechanical Engineering

Cite this

@article{1d1b981db84e4644811af28bca1cfe32,
title = "Effect of splitters in recirculation channels on performance of turbocharger compressors used in gasoline engines- A CFD study",
abstract = "Turbochargers used in gasoline engines have their compressor outlet directly coupled to the engine inlet via the throttle valve. On sudden closing of the throttle, the compressor outlet is blocked, and the compressed air has no path to exit resulting in a compressor surge. Compressor recirculation valves are used to connect the outlet of the compressor to the inlet to recirculate excess air and thus reduce the compressor surge. Under normal operating conditions, when the valve is closed, the channel connecting the compressor inlet and the valve causes an inlet disturbance resulting in the reduction of compressor efficiency. Hence a steady state CFD analysis of a gasoline engine turbocharger compressor modelled with a recirculation channel at the inlet was conducted. The channel connecting the compressor inlet and the recirculation valve was observed to cause inlet aerodynamic disturbance resulting in a drop in compressor efficiency by 1{\%}. To overcome this problem, splitters were used in recirculation channels and 80{\%} recovery of loss was observed with the use of splitters.",
author = "N. Nithesh and S. Prajwal",
year = "2019",
month = "1",
day = "1",
doi = "10.15282/ijame.16.1.2019.10.0472",
language = "English",
volume = "16",
pages = "6214--6229",
journal = "International Journal of Automotive and Mechanical Engineering",
issn = "2229-8649",
publisher = "The Automotive Engineering Centre (AEC), Universiti Malaysia Pahang",
number = "1",

}

Effect of splitters in recirculation channels on performance of turbocharger compressors used in gasoline engines- A CFD study. / Nithesh, N.; Prajwal, S.

In: International Journal of Automotive and Mechanical Engineering, Vol. 16, No. 1, 01.01.2019, p. 6214-6229.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of splitters in recirculation channels on performance of turbocharger compressors used in gasoline engines- A CFD study

AU - Nithesh, N.

AU - Prajwal, S.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Turbochargers used in gasoline engines have their compressor outlet directly coupled to the engine inlet via the throttle valve. On sudden closing of the throttle, the compressor outlet is blocked, and the compressed air has no path to exit resulting in a compressor surge. Compressor recirculation valves are used to connect the outlet of the compressor to the inlet to recirculate excess air and thus reduce the compressor surge. Under normal operating conditions, when the valve is closed, the channel connecting the compressor inlet and the valve causes an inlet disturbance resulting in the reduction of compressor efficiency. Hence a steady state CFD analysis of a gasoline engine turbocharger compressor modelled with a recirculation channel at the inlet was conducted. The channel connecting the compressor inlet and the recirculation valve was observed to cause inlet aerodynamic disturbance resulting in a drop in compressor efficiency by 1%. To overcome this problem, splitters were used in recirculation channels and 80% recovery of loss was observed with the use of splitters.

AB - Turbochargers used in gasoline engines have their compressor outlet directly coupled to the engine inlet via the throttle valve. On sudden closing of the throttle, the compressor outlet is blocked, and the compressed air has no path to exit resulting in a compressor surge. Compressor recirculation valves are used to connect the outlet of the compressor to the inlet to recirculate excess air and thus reduce the compressor surge. Under normal operating conditions, when the valve is closed, the channel connecting the compressor inlet and the valve causes an inlet disturbance resulting in the reduction of compressor efficiency. Hence a steady state CFD analysis of a gasoline engine turbocharger compressor modelled with a recirculation channel at the inlet was conducted. The channel connecting the compressor inlet and the recirculation valve was observed to cause inlet aerodynamic disturbance resulting in a drop in compressor efficiency by 1%. To overcome this problem, splitters were used in recirculation channels and 80% recovery of loss was observed with the use of splitters.

UR - http://www.scopus.com/inward/record.url?scp=85063642917&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063642917&partnerID=8YFLogxK

U2 - 10.15282/ijame.16.1.2019.10.0472

DO - 10.15282/ijame.16.1.2019.10.0472

M3 - Article

VL - 16

SP - 6214

EP - 6229

JO - International Journal of Automotive and Mechanical Engineering

JF - International Journal of Automotive and Mechanical Engineering

SN - 2229-8649

IS - 1

ER -