On Cooler and Mixing Condensation Phenomena in the Long-Route Exhaust Gas Recirculation Line

Serrano, José Ramón; Angiolini, Emanuele; Meano, Cesare Maria; Morena, Joaquín De la

doi:10.4271/2015-24-2521

Cited by 15 publications

(23 citation statements)

References 11 publications

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“…In turn it additionally reduces the compressor power consumption. To avoid the effects of condensates formed when the exhaust gas is cooled down, which might damage compressor blades (19), another cyclonic separator (16) is installed between the cooler and the mechanical compressor. The risk of condensates and its generation rate is mainly depending on the engine equivalence ratio, gas pressure, installation dilution ratio and cooler outlet temperature.…”

Section: Altitude Simulatormentioning

confidence: 99%

Analysis of the role of altitude on diesel engine performance and emissions using an atmosphere simulator

Bermúdez

Serrano

Gómez

et al. 2017

International Journal of Engine Research

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Forthcoming directives from European Commission will force homologation in altitude to approach standards to actual driving conditions in order to reduce the gap between regulated and real-life emissions. This work presents the use of a dedicated atmosphere simulator to analyse the impact of altitude on performance and emissions of a turbocharged Diesel engine. The presented equipment provides engine intake and exhaust pressure to reproduce high altitude conditions. Main advantages are related to cost savings with respect to round-robin testing campaigns ensuring controlled ambient conditions at the different altitudes. The paper shows the main features of the altitude simulator under steady-state and transient operation and the ability to control temperature at the same time that pressure according to ISA specifications. The experimental results highlight the need of specific testing facilities to perform calibration tasks as key tool to comply with future emission standards in a cost-effective manner. In particular, regulated emissions measured at altitude are shown to clearly exceed that permitted at sea-level emphasising the need to explore new dedicated engine control strategies for pollutant abatement under altitude operation.

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Section: Altitude Simulatormentioning

confidence: 99%

Analysis of the role of altitude on diesel engine performance and emissions using an atmosphere simulator

Bermúdez

Serrano

Gómez

et al. 2017

International Journal of Engine Research

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“…If condensation occurs, water droplets are driven towards the compressor wheel which is normally rotating at very high speed, implying elevated relative momentum and impact damage [19]. Dramatic consequences are observed at the leading edges of the compressor wheel if droplets impact the blades for long enough, as noticed by Serrano et al [20]. Surface coating is normally applied to the wheel, partially protecting against this erosion, partially protecting against this erosion, nevertheless it is not infallible, as observed by Koka et al [21].…”

Section: Introductionmentioning

confidence: 90%

“…The analytical solutions used to compare and verify the proposed model in this work correspond to an energy and mass balance system of Eqs. de- veloped by Serrano et al [20]. As can be found in the referred work, the conservation equations are solved analytically with an iterative resolution method, to get the final state of a perfect mixing of two gases at different conditions, assuming an isenthalpic evolution.…”

Section: Background and Model Validation Strategymentioning

confidence: 99%

“…T Comparisons are performed using the perfect mixing 0D balance equations developed by Serrano et al [20] as the reference. Regarding 3D simulation, errors below 1% are found for water condensation and temperature for all the range of EGR rate.…”

Section: Modelmentioning

confidence: 99%

“…Surface coating is normally applied to the wheel, partially protecting against this erosion, partially protecting against this erosion, nevertheless it is not infallible, as observed by Koka et al [21]. Once the water penetrates the compressor inducer, due to its inertia, it may not follow the air streamlines but get attached to the wheel walls, forming rivers and leaving depositions [20]. The load of the compressor wheel may also change, according to Surendran et al [22].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development and verification of an in-flow water condensation model for 3D-CFD simulations of humid air streams mixing

et al. 2018

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Bulk flow condensation caused by the mixing of air streams at different temperatures and humidities is a thermodynamic process that requires strong assumptions to be calculated with low computational effort. The applicability of a model that correctly predicts this phenomenon has grown recently due in part to the deployment of the Long Route Exhaust Gas Recirculation emission reduction technique in combustion engines and the damage to the turbocharger caused by the condensation produced when the intake air is mixed with the combustion gases. This work is addressed to expose a condensation model that is implemented in a commercial 3D-CFD code and is then verified, checking whether the implemented physical equations are behaving as intended. Finally, a practical application is made, showing the potential of model to predict water condensation in a LR-EGR T-joint.

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Experimental response surface study of the effects of low-pressure exhaust gas recirculation mixing on turbocharger compressor performance

et al. 2020

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On Cooler and Mixing Condensation Phenomena in the Long-Route Exhaust Gas Recirculation Line

Cited by 15 publications

References 11 publications

Analysis of the role of altitude on diesel engine performance and emissions using an atmosphere simulator

Analysis of the role of altitude on diesel engine performance and emissions using an atmosphere simulator

Development and verification of an in-flow water condensation model for 3D-CFD simulations of humid air streams mixing

Experimental response surface study of the effects of low-pressure exhaust gas recirculation mixing on turbocharger compressor performance

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