AVL Boost: a powerful tool for research and education

Bellér, G; Árpád, I; Kiss, J T; Kocsis, D

doi:10.1088/1742-6596/1935/1/012015

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…При цьому перевірити ту чи іншу цифру, рекомендацію чи припущення про зв'язок результату вимірювання з несправністю, а також скоригувати отримані дані відповідно до своїх умов споживач не може, оскільки не має широко відомих і визнаних моделей та методів розрахункової оцінки. Ті ж моделі, які можна було б використовувати для отримання шуканих закономірностей, або побудовані на спрощених моделях політропних процесів [15] або мають обмеження [16,17], які не дозволяють моделювати процес холодного прокручування без згоряння [18].…”

Section: аналіз публікаційunclassified

Method for expert evaluation of the technical con-dition of the cylinder-piston group of automotive engines after hydrolock

Khrulev,

Saraiev,

Saraieva

2024

VEIT

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Problem: The study examines the thermogasdynamic process within an internal combustion engine cylinder during cold cranking mode while measuring compression. Analysis of various models and comparison of known data revealed unresolved challenges in constructing mathematical models of the engine operating cycle. The vast majority of practical data and recommendations for compression measurement in a cylinder are based on empirical knowledge, numerous experiments, and tests. Consequently, there arises a need for computational models of the compression measurement process and their theoretical justification, particularly in cases where engine damage occurs during hydrolock in a cylinder. Methodology. To address the identified issues, a mathematical model of the thermogasdynamic process within the cylinder during cold cranking while measuring compression was developed. Originality. Unlike existing models, this model describes the processes in the cylinder step by step, considering the real nature of intake-exhaust processes, air leakage through part interfaces, and heat exchange with the walls. Through modeling, the main patterns of compression changes depending on the modes and the nature of damage to associated parts of the valve mechanism and the cylinder-piston group were identified, including deformation of the connecting rod during hydraulic lock due to liquid entering the cylinder. Practical value. Based on the study results, it was concluded that the model's properties make it effectively applicable in diagnosing and monitoring the technical condition of automotive engines during operation.

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Section: аналіз публікаційunclassified

Method for expert evaluation of the technical con-dition of the cylinder-piston group of automotive engines after hydrolock

Khrulev,

Saraiev,

Saraieva

2024

VEIT

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“…This is how the most famous models are built. However, some of them, for example, AVL-Boost (Austria) [12], which has a similar thermodynamic basis, provide for the possibility of improving individual elements (models), including in the direction of increasing their dimensionality. In the Ricardo-WAVE model (England) [13,14], a one-dimensional representation of the flow in the inlet and outlet channels allows a 3-dimensional user model only for the mixing and combustion processes in the cylinder.…”

Section: Introductionmentioning

confidence: 99%

Determination of gas parameters in resonant pipes and channels of engines with a periodic workflow using the piston analogy method

Khrulev

2023

EEJET

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This paper investigates a process of gas flow in the resonant tube of an engine with a periodic workflow. Analysis of various flow models and comparison of known data have shown that the problems of constructing closed 0-dimensional models of the operating cycle for some types of engines remain unresolved. Given this, the question arises about the dimensionality of models of individual engine elements, including the resonant pipe model, which must be included in the general model of the cycle, especially at the initial stage of its development. To solve the identified problems, a mathematical model of air flow has been improved, built on the basis of an analogy with a '"liquid" piston. Unlike existing ones, the piston analogy model allows one to calculate the instantaneous velocity averaged over the length of the pipe using a numerical solution of the differential equation for velocity. To test the model built, an alternative finite-difference 1-dimensional gas-dynamic model was selected, with the help of which a test simulation of air flow in a pipe was performed. It has been established that the piston model allows one to find the flow velocity with an accuracy of 5 % for a pressure drop varying according to a sinusoidal law. The permissible limits for changes in the oscillation frequency and pipe length were found, at which the piston model has a minimum error. Based on the results of the study, it was concluded that with a small mass and inertia of the liquid piston, the proposed model gives results close to those provided by more complex models with higher dimensionality. This indicates the possibility of using a piston model for elements such as pipes as part of a 0-dimensional thermodynamic model of engines with a periodic operating process as an approximate alternative to traditional 1-dimensional flow models

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“…The stoichiometric air-fuel ratio and lower heating value for different blends of alcohols and gasoline[12] …”

mentioning

confidence: 99%

On the influence of different alcohol-type biofuels on performance and engine emissions of an SI engine

Conțiu,

Chiriac

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Greenhouse gas emissions (G.H.G.) from vehicles are the main source of pollution. In this transition period from fossil fuels to the use of synthetic fuels, the diversification of alternative fuels used to fuel internal combustion engines is seen as one of the best alternatives for reducing G.H.G. In Europe, conforming to the stringent emission reduction targets for 2030, as well as trying to fulfil the regulations of the new Euro VII standard will force engine manufacturers to adopt alternative fuel solutions with a low environmental impact. However, fossil fuels will continue to be used but alternative fuels will substantially decrease our dependence on petroleum-derived fuels. Modern simulation software tools make it easy to produce a fairly accurate analysis of how an internal combustion engine works without the need for prototyping. Packages such as Ricardo WAVE or AVL Boost, are relatively cheap and represent accessible tools for developing, designing, and testing modern internal combustion engines. AVL Boost is a widely used engine simulation tool a 1D (one-dimensional) simulation software that allows engineers and researchers to model, simulate, and optimize various internal combustion engines, including spark ignition (SI) engines, diesel engines, and hybrid powertrains. The software also offers a high degree of flexibility in terms of alternative fuel blends. This paper evaluates the influences of using alcohol-based biofuels on performance metrics and pollutant emissions, such as brake power, brake thermal efficiency, and emissions, such as CO, CO2, and NOx in a spark ignition engine. The effects of varying alcohol fractions in the gasoline-alcohol blends on engine performance and emissions are analysed and explained. In this study, several types of ethanol in gasoline blends were simulated (E25, E50, E85). The one-dimensional model of the tested engine was developed based on the design dimensions of the 1.2L TCe H5FT engine produced by Renault. In the context of maintaining constant engine power output, the findings from the simulation results indicate that the utilization of alcohol-based blends with a high volumetric percentage of alcohol (ranging from 70-90%) can result in a substantial increase in fuel consumption, particularly in the case of methanol blends. Consequently, this phenomenon is associated with an elevated emission of carbon dioxide (CO2). However, it should be noted that despite this drawback, there is evidence of an inclination towards reduced emissions of other pollutants due to the enhanced combustion processes facilitated by the higher ratio of oxygenated compounds and a lower peak temperature. Methanol, one of the two alcohols investigated in this study, is not recommended for usage in fuel blends for several reasons. Firstly, the consumption rate of methanol is higher compared to ethanol, which can result in increased fuel usage. Secondly, methanol poses health risks due to its toxicity at certain levels, posing potential hazards in handling and utilization. Moreover, high concentrations of methanol are not easily miscible with gasoline without the addition of co-solvents, further limiting its feasibility as a viable fuel component.

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AVL Boost: a powerful tool for research and education

Cited by 9 publications

References 18 publications

Method for expert evaluation of the technical con-dition of the cylinder-piston group of automotive engines after hydrolock

Method for expert evaluation of the technical con-dition of the cylinder-piston group of automotive engines after hydrolock

Determination of gas parameters in resonant pipes and channels of engines with a periodic workflow using the piston analogy method

On the influence of different alcohol-type biofuels on performance and engine emissions of an SI engine

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