Turbocharging the Internal Combustion Engine

Watson, N.; Janota, Mikoláš

doi:10.1007/978-1-349-04024-7

Cited by 681 publications

(544 citation statements)

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“…According to Watson and Janota [134] and experimental results by Westin [126], Haugwitz [109] and Zhuge et al [127], it can be assumed that the turbine efficiency is a function of the pressure ratio and the speed of the shaft and that a maximum efficiency exists for each speed line. According to Reuter et al [135], the instantaneous isentropic turbine efficiency can be calculated with Westin [126] suggested that the polar moment of inertia can be determined with the trifilar method as …”

Section: Turbinementioning

confidence: 99%

“…According to Westin [126], Renberg [136], Watson and Janota [134] and Moraal and Kolmanovsky [131], steady flow theory states that if the data in an original turbine map, showing a curve on axes of pressure ratio vs. mass flow rate, is plotted as efficiency vs.…”

Section: Turbinementioning

confidence: 99%

“…It is debatable how the turbine works under unsteady flow -Westin [126] showed that the blade speed ratio at maximum efficiency could stray away from the standard value of 0.707, at non-steady conditions. According to Watson and Janota [134] the problem can be treated as quasi-steady flow, meaning that the turbine performs under non-steady flow in the same way as it would if those sudden flow conditions were steady. Evidence on the error introduced by this assumption is not entirely consistent and it is commonly believed that the error will not exceed 5 % [134].…”

Section: Turbinementioning

confidence: 99%

“…According to Watson and Janota [134] the problem can be treated as quasi-steady flow, meaning that the turbine performs under non-steady flow in the same way as it would if those sudden flow conditions were steady. Evidence on the error introduced by this assumption is not entirely consistent and it is commonly believed that the error will not exceed 5 % [134]. Capobianco and Marelli [139], showed the errors due to this assumption.…”

Section: Turbinementioning

confidence: 99%

See 3 more Smart Citations

A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle

Roux

Bello‐Ochende

Meyer

2013

Renewable and Sustainable Energy Reviews

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Many studies have been published on the performance and optimisation of the Brayton cycle and solar thermal Brayton cycle showing the potential, merits and challenges of this technology. Solar thermal Brayton systems have potential to be used as power plants in many sun-drenched countries. It can be very competitive in terms of efficiency, cost and environmental impact. When designing a system such as a recuperative Brayton cycle there is always a compromise between allowing effective heat transfer and keeping pressure losses in components small. The high temperatures required in especially the receiver of the system presents a challenge in terms of irreversibilities due to heat loss. In this paper, the authors recommend the use of the total entropy generation minimisation method. This method can be applied for the modelling of a system and can serve as validation when compared with first-law modelling. The authors review various modelling perspectives required to develop an objective function for solar thermal power optimisation, including modelling of the sun as an exergy source, the Gouy-Stodola theorem and turbine modelling.With recommendations, the authors of this paper wish to clarify and simplify the optimisation and modelling of the solar thermal Brayton cycle for future work. The work is applicable to solar thermal studies in general but focuses on the small-scale recuperated solar thermal Brayton cycle.2

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Section: Turbinementioning

confidence: 99%

Section: Turbinementioning

confidence: 99%

Section: Turbinementioning

confidence: 99%

Section: Turbinementioning

confidence: 99%

See 2 more Smart Citations

A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle

Roux

Bello‐Ochende

Meyer

2013

Renewable and Sustainable Energy Reviews

View full text Add to dashboard Cite

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“…However, for a given turbo machine the geometry does not change, and the influence of the Reynolds number is also considered small, see (Watson and Janota, 1982). Based on this observation, the dimensionless quantities are abandoned for quantites that are referred to a nominal input conditioṅ…”

Section: Compressormentioning

confidence: 99%

Modeling of a turbocharged SI engine

Eriksson

Nielsen

Brugård

et al. 2002

Annual Reviews in Control

118

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Turbo charged SI engines are a major possibility in the current trend of down-sized engines with preserved drivability performance. Considering control and supervision it is favorable to have a mean value model to be used e.g. in observer design. Such models of turbo engines are similar to those of naturally aspirated engines, but there are some special characteristics, e.g. the interconnected gas flows, the intercooler, the difference in relative sizes between the gas volumes (compared to naturally aspirated engines), the turbo, and the waste gate. Here, a model is developed with a strategy to find a model for each engine component (air filter, compressor, after cooler (or intercooler), throttle, engine, turbine, waste gate, and a lumped model for the catalyst and exhaust) as they behave in an engine setting. When investigating agreement with measured data and sensitivity of possible model structures, a number of interesting issues are raised. The experiments and the model validation have been performed on a Saab 2.3 l production engine.

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Experimental and simulation analysis of the transient operation of a turbocharged multi-cylinder IDI diesel engine

Rakopoulos

Giakoumis

Hountalas

1998

Int. J. Energy Res.

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SUMMARYAn experimental and theoretical analysis is carried out to study the response of a multi-cylinder, turbocharged, IDI (indirect injection) compression ignition engine, under transient operating conditions. To this aim, a comprehensive digital computer model is developed which solves the governing differential equations individually for each cylinder, providing thus increased accuracy over previous 'single-cylinder' simulations. Special attention has been paid for diversifying the transient operation from the steady-state one, providing improved or even new relations concerning combustion, heat transfer to the cylinder walls, friction, turbocharger and aftercooler operation, and dynamic analysis for the transient case. An extended steady state and transient experimental work is conducted on a specially developed engine test bed configuration, located at the authors' laboratory, which is connected to a high-speed data acquisition and processing system. The steady-state measurements are used for the calibration of the individual submodel constants. The transient investigation includes both speed and load changes operating schedules. During each transient test four major measurements are continuously made, i.e. engine speed, fuel pump rack position, main chamber pressure and turbocharger compressor boost pressure. The hydraulic brake coupled to the engine possesses a high mass moment of inertia and long nonlinear load-change times, which together with the indirect injection nature of the engine are important challenges for the simulation code. Explicit multiple diagrams are given to describe the engine and turbocharger transient behaviour including smoke predictions. The agreement between experimental and predicted responses is satisfactory, for all the cases examined, proving the validity of the simulation process, while providing useful information for the engine response under various transient operations.

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Turbocharging the Internal Combustion Engine

Cited by 681 publications

References 0 publications

A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle

A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle

Modeling of a turbocharged SI engine

Experimental and simulation analysis of the transient operation of a turbocharged multi-cylinder IDI diesel engine

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