Mostrando ítems 1-4 de 4

Acoustic emissions in the valuation of the combustion chamber pressure of an engine

Rojas Suárez, J P; Pabón León, J A; Orjuela Abril1, M S (2021-08-26)

Internal combustion engines demand advanced monitoring methodologies to promote efficient operation; particularly, the combustion pressure plays a central role in the overall performance, which promotes the utilization of ...
Development of a virtual bench for the analysis of the physical processes of internal combustion engines

Rojas Suárez, J P; Pabón León, J A; Orjuela Abril, M S (2021-08-27)

Currently, internal combustion engines face the challenge of reducing fuel consumption and reducing polluting emissions due to their significant impact on the environment. Therefore, it is necessary to use tools that allow ...
Numerical simulation to analyze the physical behavior of centrifugal pumps as a turbine

Prada Botia, Gaudy Carolina; Pabón León, J A; Orjuela Abril, M S (Journal of Physics, 2021-05)

In this research, a methodology based on the development of numerical simulations is proposed to analyze the physical behavior of centrifugal pumps such as a turbine. Numerical simulations were carried out using OpenFOAM ...
Numerical study of the physical processes of gas leakage in the compression ring in diesel engines

Pabón León, J A; Rojas Suárez, J P; Orjuela Abril, M S (2021-09-03)

In this research, the construction of a numerical model is proposed for the analysis of the friction processes and the thickness of the lubrication film present in the compression ring of internal combustion engines. The ...

Envíos recientes

Acoustic emissions in the valuation of the combustion chamber pressure of an engine
...
Rojas Suárez, J P | 2021-08-26

Internal combustion engines demand advanced monitoring methodologies to promote efficient operation; particularly, the combustion pressure plays a central role in the overall performance, which promotes the utilization of transducers that hinders. Therefore, the present study introduces an acoustic emission methodology that serves for indirect combustion pressure measurements. Accordingly, the compound methodology integrates the Hilbert transform and the complex cepstrum using neural networks to accomplish pressure signal reconstruction. Results demonstrated that the proposed methodology featured robust performance while estimating pressure signals as it mitigates the combined noise effect produced by variations in engine speed, engine load, and fuel type. Moreover, the reconstructed signal facilitated the determination of key performance parameters such as peak pressure, pressure timing, and effective mean pressure. Relative error amounted to less than 10%, which ratified the robustness of the indirect pressure measurements. In conclusion, acoustic signal techniques represent an adequate approach to estimate the combustion pressure at variable engine conditions.

LEER
Development of a virtual bench for the analysis of the physical processes of internal combustion engines
...
Rojas Suárez, J P | 2021-08-27

Currently, internal combustion engines face the challenge of reducing fuel consumption and reducing polluting emissions due to their significant impact on the environment. Therefore, it is necessary to use tools that allow us to evaluate the operating characteristics of this type of thermal machines. In the present investigation, the development of a virtual bench was proposed for the analysis of the behavior and performance characteristics of an internal combustion engine for use as a learning tool in higher education students. From the results obtained, it could be demonstrated that the pressure curves of the combustion chamber and the rate of heat release obtained by means of the virtual bench presented a high concordance with the experimental records. The maximum deviation obtained was 5% and 15% for the pressure curve and the heat release rate. Comparing the performance parameters of the brake specific fuel consumption of the engine and energy efficiency, a maximum deviation of 2.96% was shown compared to the real engine. In general, the virtual development bank can describe the behavior of the engine, allowing the characterization of physical phenomena, as well as evaluating the effect of auxiliary technologies such as turbo-compression systems.

LEER
Numerical simulation to analyze the physical behavior of centrifugal pumps as a turbine
...
Prada Botia, Gaudy Carolina | 2021-05

In this research, a methodology based on the development of numerical simulations is proposed to analyze the physical behavior of centrifugal pumps such as a turbine. Numerical simulations were carried out using OpenFOAM software. For the validation of the numerical model, the construction of an experimental test bench was carried out. The analysis carried out involves the evaluation of performance parameters of the pump as a turbine, such as head, power, and efficiency. Additionally, the effect of the rotation speed on the previous parameters is evaluated. From the results obtained, it was shown that the maximum relative error was 4%, 3.4%, and 3.8% for the head, power, and efficiency parameters, respectively. In general, it was evidenced that the proposed numerical simulation has the ability to describe the real trends of the pump as a turbine for different flow conditions. In addition, an 11% increase in rotational speed was shown to cause a 12%, 1.9%, and 3% increase in head, power, and maximum efficiency. The proposed methodology is considered an adequate tool to analyze performance and identify the best efficiency point of pump systems such as a turbine. In this way, greater energy use is guaranteed.

LEER
Numerical study of the physical processes of gas leakage in the compression ring in diesel engines
...
Pabón León, J A | 2021-09-03

In this research, the construction of a numerical model is proposed for the analysis of the friction processes and the thickness of the lubrication film present in the compression ring of internal combustion engines. The model is built using MATLAB software, and three load conditions are used as reference (2 Nm, 4 Nm, and 6 Nm) with a rotation speed of 3600 rpm, which correspond to a stationary single-cylinder diesel engine. Comparison between model estimates and experimental results show that the development model could predict the actual engine conditions. The deviation between the numerical model and the experimental data was 17%. It was shown that the increase in engine load causes a 16% increase in the friction force of the compression ring, which implies a 50% increase in power loss due to friction processes. In general, the model developed allows the analysis of the friction processes in the compression ring and its effect on the lubrication film, considering the leakage of the combustion gases. In this way, the construction of a more complex mathematical model is achieved, which allows improving the precision in the analyzes related to the interaction between the compression ring and the cylinder liner.

LEER

‹›

Repositorio Digital

Listar por autor "Pabón León, J A"

Acoustic emissions in the valuation of the combustion chamber pressure of an engine

Development of a virtual bench for the analysis of the physical processes of internal combustion engines

Numerical simulation to analyze the physical behavior of centrifugal pumps as a turbine

Numerical study of the physical processes of gas leakage in the compression ring in diesel engines

Envíos recientes

Acoustic emissions in the valuation of the combustion chamber pressure of an engine

Development of a virtual bench for the analysis of the physical processes of internal combustion engines

Numerical simulation to analyze the physical behavior of centrifugal pumps as a turbine

Numerical study of the physical processes of gas leakage in the compression ring in diesel engines

Portales Institucionales

Enlaces de Interés

Contactos

Listar por autor "Pabón León, J A"

Acoustic emissions in the valuation of the combustion chamber pressure of an engine ﻿

Development of a virtual bench for the analysis of the physical processes of internal combustion engines ﻿

Numerical simulation to analyze the physical behavior of centrifugal pumps as a turbine ﻿

Numerical study of the physical processes of gas leakage in the compression ring in diesel engines ﻿

Envíos recientes

Acoustic emissions in the valuation of the combustion chamber pressure of an engine

Development of a virtual bench for the analysis of the physical processes of internal combustion engines

Numerical simulation to analyze the physical behavior of centrifugal pumps as a turbine

Numerical study of the physical processes of gas leakage in the compression ring in diesel engines

Portales Institucionales

Acoustic emissions in the valuation of the combustion chamber pressure of an engine

Development of a virtual bench for the analysis of the physical processes of internal combustion engines

Numerical simulation to analyze the physical behavior of centrifugal pumps as a turbine

Numerical study of the physical processes of gas leakage in the compression ring in diesel engines