Review of Turbocharger Mapping and 1D Modelling Inaccuracies with Specific Focus on Two-Stag Systems

Avola, Calogero; Copeland, Colin; Duda, Tomasz; Burke, Richard; Akehurst, Sam; Brace, Chris

doi:10.4271/2015-24-2523

Cited by 10 publications

(6 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite the smaller displacement volume of the engine, the power output is higher through boosting that helps to induct more air to burn the fuel. Reducing the pumping, frictional and heat losses reduces the fuel consumption with the reduced engine out emissions (Avola et al 2015). The pressure/temperature history of these modern engines are far away from the RON/MON conditions in that the octane rating scale is no longer agreeable.…”

Section: Engine Downsizingmentioning

confidence: 99%

“…These engines depend on a factor "k", which is a constant in the octane index formulation (OI = RON -k * S). The factor "k" is negative for highly boosted downsized engines when knock limited and requires fuels with higher octane sensitivity (Avola et al 2015). Variable Geometry Turbine (VGT) is a technological advancement in the development of turbocharged engines that allows for a fast transient response to synergize appropriately with the engine (Tang 2016).…”

Section: Engine Downsizingmentioning

confidence: 99%

See 1 more Smart Citation

Combustion-Based Transportation in a Carbon-Constrained World—A Review

Javed

Ahmed

Vallinayagam

et al. 2018

Pollutants From Energy Sources

View full text Add to dashboard Cite

The transportation sector accounts for around a quarter of global CO 2 emissions and is powered predominantly by fossil-derived fuels. The regulatory framework is evolving globally to more stringent requirements for fuel efficiency and CO 2 emissions, forcing the OEMs to adopt advanced powertrain technologies. Such changes are more evident in the light-duty road transportation sector compared to the heavy-duty road, marine and air transportation sectors. Here, a holistic review of the current and prospective regulations targeted at curbing transportationbased CO 2 emissions is presented. For road transport, these include various government-and state-level policy initiatives such as the Corporate Average Fuel Economy (CAFE) and CO 2 emission standards and the zero emission mandates. For marine and aviation sectors, these include the International Maritime Organization (IMO) and the International Civil Aviation Organization (ICAO) regulations and aspirations targeted at reducing the CO 2 footprint. The compliance options for these regulations are evaluated using a combination of fuels, engines, and hybridization in each transportation sector. Furthermore, a brief overview of how OEMs are working toward achieving these targets is presented. An overview of several advanced spark and compression ignition engine technologies with the potential to improve the fuel economy and CO 2 emissions is presented. Finally, an overview of major disruptions that are changing the road-based transportation is presented and a balanced life cycle based policy approach is advocated.

show abstract

Section: Engine Downsizingmentioning

confidence: 99%

Section: Engine Downsizingmentioning

confidence: 99%

Combustion-Based Transportation in a Carbon-Constrained World—A Review

Javed

Ahmed

Vallinayagam

et al. 2018

Pollutants From Energy Sources

View full text Add to dashboard Cite

show abstract

“…In their study, the actual thermodynamic properties of the engine combustion products were considered in the assessment of the enthalpy drop within the turbine. Mezher et al, 12 Avola et al 13 developed a zero-dimensional acoustic model to investigate the effect of the geometrical parameters of the intake manifold at low-end torque conditions. Reihani et al 14 revealed a positive impact of the integration of low-pressure recirculation devices on further enhancing turbine and ICE performances.…”

Section: Introductionmentioning

confidence: 99%

Analysis of performance and time lag of turbocharger turbines fed with gasoline and diesel burnt gases and air under pulsating flow conditions

Ketata

Driss

2022

International Journal of Engine Research

View full text Add to dashboard Cite

The turbine, an enabling component of turbochargers, is a seat of highly complex unsteady flow as well as varying gas compositions between diesel and gasoline engines. Thus, it is necessary to take into account different physical models when simulating such turbines. Researchers have often considered the turbine working gas as air, which may not lead to an accurate prediction of actual turbine characteristics. In the present work, the effect of the working gas on the performance of turbocharger turbines as well as on the turbo lag was investigated through a set of numerical simulations for six wastegate opening degrees from 0% up to 100% and under a wide range of the flow pulse frequency ranging from 33.33 up to 166.66 Hz. Four working fluids were involved in this study which are the gasoline burnt gas, diesel burnt gas, air with like gasoline engine waves, and air with like diesel engine waves. The performance of the turbine and its responsiveness quantified as the time lag with burnt gases from both diesel and gasoline engines were compared to those with air. Results showed totally deviated unsteady performance characteristics compared to the turbine working with air. Results also confirmed that considering the working fluid as air may not lead to a fair representation of the actual turbine performance characteristics. The findings of this work put emphasis on the importance of the gas composition when modeling such turbines by engineers especially during the design process where a good turbocharger-engine match has to be met.

show abstract

“…Some evidences of the previous, are the several studies dealing with new technologies in the context of turbocharging the ICE. Some examples of the previous are: Ball bearings technology [1]; two stage turbocharging [2,3]; SRCT usage [4,5] and twin entry turbines [6].…”

Section: Introductionmentioning

confidence: 99%

A Methodology for Measuring Turbocharger Adiabatic Maps in a Gas-Stand and Its Usage for Calibrating Control Oriented and One-Dimensional Models at Early ICE Design Stages

Serrano

Arnau

Gómez-Vilanova

et al. 2020

Journal of Energy Resources Technology

View full text Add to dashboard Cite

In this work it is proposed a methodology to standardize turbochargers testing based in measuring the maps twice: in close to adiabatic and in diathermal conditions. Along the paper it is discussed with special detail the impact of the procedure followed to achieve said quasi-adiabatic conditions in both the energy balance of the turbocharger and the testing complexity. As a conclusion, the paper proposes a methodology which combines quasi-adiabatic tests (cold and hot gas flow) with diathermal tests (hot gas flow) in order to extract from a turbocharger gas-stand all information needed by engine designers interested in controlling or 1D-modelling the ICE. The methodology is completed with a guide for calibrating said control-oriented turbocharger models in order to separate aerodynamic efficiency (adiabatic) from heat transfer losses and from friction losses in the analysis of the turbocharger performance. The outsourced calibration of the turbocharger model allows avoiding uncertainties in the global ICE model calibration, what is very interesting for turbochargers benchmarking at early ICE-turbo matching stages or for global system analysis at early control design stages.

show abstract

Review of Turbocharger Mapping and 1D Modelling Inaccuracies with Specific Focus on Two-Stag Systems

Cited by 10 publications

References 51 publications

Combustion-Based Transportation in a Carbon-Constrained World—A Review

Combustion-Based Transportation in a Carbon-Constrained World—A Review

Analysis of performance and time lag of turbocharger turbines fed with gasoline and diesel burnt gases and air under pulsating flow conditions

A Methodology for Measuring Turbocharger Adiabatic Maps in a Gas-Stand and Its Usage for Calibrating Control Oriented and One-Dimensional Models at Early ICE Design Stages

Contact Info

Product

Resources

About