Now showing items 1-7 of 7

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 ...
An application of physics: simply supported bridges made of post-tensioned concrete and structural steel beam

Márquez Peñaranda, J F; Pineda Rodríguez, J R; Rojas Suárez, J P (Journal of Physics: Conference SeriesReino Unido, 2022-01-06)

Bridges represent an important application of physics capable of solving real transportation problems. Knowledge of convenience of different mechanical solutions when analyzing and designing bridge is needed. For these ...
Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters

Prada Botia, Gaudy Carolina; Rojas Suárez, J P; Orjuela Abril, M S (Reino Unido, 2021)

This paper presents the implementation and design features of a gravimetric-based fuel consumption system. The proposed system comprises a gravimetric balance with serial output, a fuel pump, and a control valve that are ...
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 ...
Evaluation of the fire resistance of steel-reinforced concretefilled steel tubular columns with a circular cross-section

Rojas Suárez, J P; Pabón León, Jhon Antuny; Orjuela Abril, Martha Sofia (Journal of Physics: Conference SeriesReino Unido, 2022-01-06)

In the present investigation, an analysis of the fire resistance of the steel-reinforced concrete-filled steel tubular columns with circular cross-sections was carried out by means of numerical simulation. The development ...
First International Seminar on Physical Infrastructure (1st ISPI)

Yung Vargas, Yee Wan; Rodriguez Lizcano, Adriana; Ortiz Vasquez, L F; Rojas Suárez, J P; V. Niño, Ely Dannier (Journal of Physics: Conference SeriesReino Unido, 2022-01-06)

The First International Seminar on Physical Infrastructure (1st ISPI) was an academic and scientific event organized by the Road Infrastructure Research Group and the Road Infrastructure Research Seedbed of the Universidad ...
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 ...

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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.

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An application of physics: simply supported bridges made of post-tensioned concrete and structural steel beam
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Márquez Peñaranda, J F | 2022-01-06

Bridges represent an important application of physics capable of solving real transportation problems. Knowledge of convenience of different mechanical solutions when analyzing and designing bridge is needed. For these reasons, this work is focused on the study of convenience of using two types of bridges. Simply supported short-medium span bridges (30 m to 45 m) are usually excessively long when choosing reinforced concrete solutions and usually short for other types of structures such as cable-stayed or cantilever bridges. The suitability of simply supported bridges leads to the need of studying their cost benefit ratios. This work studies the cost benefit ratio for post-tensioned concrete beams and structural steel girders in simply supported straight bridges. Eight models built of type I sections were used in both cases to analyze the bridges using a software based on the stiffness method. Span of each bridge was set to 30 m, 35 m, 40 m, and 45 m. The convenience of each type of bridge was done comparing the total and the cost per linear meter of each solution (post-tensioned and structural steel). Comparison was done using material consumption, labor, and construction processes costs only. Also, allowable vertical displacement given by current bridge design standards was verified

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Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters
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Prada Botia, Gaudy Carolina | 2021

This paper presents the implementation and design features of a gravimetric-based fuel consumption system. The proposed system comprises a gravimetric balance with serial output, a fuel pump, and a control valve that are integrated into a complete engine test bench via Arduino UNO®. The study implements an instrumentation methodology to minimize measurement disturbance and error propagation, which represents a major concern in engine experimental testing. Moreover, an interactive virtual environment is developed to reinforce user interaction via LabView™. Results demonstrated that the proposed measurement system features robust and reliable operation while maintaining negligible disturbance and overall uncertainty ranging from 0.010-0.23 g/s. Additionally, it was evidenced that the measurement system allows the analysis of key parameters to evaluate engine performance. The study of the fuels blends shows that the ethanol content causes a 6.8% increase in brake specific fuel consumption and a 4% decrease in the brake thermal efficiency. Due to the low cost of the developed measurement system can be easily adapted to test bench laboratories to promote a better learning process and in industrial sectors for better energy management.

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

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Evaluation of the fire resistance of steel-reinforced concretefilled steel tubular columns with a circular cross-section
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Rojas Suárez, J P | 2022-01-06

In the present investigation, an analysis of the fire resistance of the steel-reinforced concrete-filled steel tubular columns with circular cross-sections was carried out by means of numerical simulation. The development of the study was carried out by means of numerical simulation to predict the behavior of the column against fire. The results of the numerical model are validated by comparing the temperature levels obtained through experimental tests. From the results obtained, it is shown that the increase in the contact area between the steel and the concrete reduces the average temperature of the column, which implies a greater resistance to fire. The fire resistance of the columns with the steel profile designs are between 3.4 - 3.6 times higher compared to the column only made of concrete, which is an indication of the excellent performance of the steel-reinforced concrete-filled steel tubular columns with circular crosssections columns. In general, the methodology proposed in this research allows the analysis of the thermal physical phenomena of the different columns used for the construction of buildings.

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First International Seminar on Physical Infrastructure (1st ISPI)
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Yung Vargas, Yee Wan | 2022-01-06

The First International Seminar on Physical Infrastructure (1st ISPI) was an academic and scientific event organized by the Road Infrastructure Research Group and the Road Infrastructure Research Seedbed of the Universidad Francisco de Paula Santander, San José de Cúcuta, Colombia; the 1st ISPI was held from October 13 to 15, 2021. The purpose of the 1st ISPI was to allow the academic and scientific community, researchers, professors, professionals, and students, to share results and research proposals in the areas of Engineering, Mathematics, and Physics; during the 1st ISPI is presented 29 research work, of which 6 were plenary lectures from Spain, Brazil, Venezuela, and Colombia, and 23 talks, on different topics that allowed to the participants the to learn about the current state of the Physical Infrastructure, the Mathematical Modeling, the Physical and Numerical Modeling, the Physicochemical Phenomena in Engineering, the Advances in Materials Science and Engineering, the Simulation of PhysicalMathematical Problems in Engineering, and the Teaching and Research Techniques in Science and Engineering. The website of the conference is available at https://foristom.org/1ispi. On behalf of the organizing committee of the 1st ISPI, we are extremely thankful to all authors and participants for providing their valuable contributions to this Proceedings volume as well as the reviewers for their constructive recommendations and criticism aiding to improve the presented articles. Likewise, we like to thank the Universidad Francisco de Paula Santander, and the Foundation of Researchers in Materials Science and Technology, for all the support technical and logistical received. Likewise, the organizing committee 1st ISPI thanks all who attended this edition of the event, and we are very proud to have carried out this event successfully that allowing the generation and effective transfer of new knowledge regarding the topics addressed during the event; we will be waiting for you at the 2nd ISPI in 2022. Finally, the editor hopes that those interested in the area of physical infrastructure can enjoy this reading, of the volume of the Journal of Physics: Conference Series (JPCS), which reflects a wide variety of current issues.

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

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Browsing by Author "Rojas Suárez, J P"

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

An application of physics: simply supported bridges made of post-tensioned concrete and structural steel beam

Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters

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

Evaluation of the fire resistance of steel-reinforced concretefilled steel tubular columns with a circular cross-section

First International Seminar on Physical Infrastructure (1st ISPI)

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

An application of physics: simply supported bridges made of post-tensioned concrete and structural steel beam

Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters

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

Evaluation of the fire resistance of steel-reinforced concretefilled steel tubular columns with a circular cross-section

First International Seminar on Physical Infrastructure (1st ISPI)

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

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Browsing by Author "Rojas Suárez, J P"

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

An application of physics: simply supported bridges made of post-tensioned concrete and structural steel beam ﻿

Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters ﻿

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

Evaluation of the fire resistance of steel-reinforced concretefilled steel tubular columns with a circular cross-section ﻿

First International Seminar on Physical Infrastructure (1st ISPI) ﻿

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

An application of physics: simply supported bridges made of post-tensioned concrete and structural steel beam

Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters

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

Evaluation of the fire resistance of steel-reinforced concretefilled steel tubular columns with a circular cross-section

First International Seminar on Physical Infrastructure (1st ISPI)

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

An application of physics: simply supported bridges made of post-tensioned concrete and structural steel beam

Development of a gravimetric fuel measurement system for the evaluation of engine performance physical parameters

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

Evaluation of the fire resistance of steel-reinforced concretefilled steel tubular columns with a circular cross-section

First International Seminar on Physical Infrastructure (1st ISPI)

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