Aminu Ismail - Academia.edu (original) (raw)
Papers by Aminu Ismail
2022 8th International Engineering Conference on Sustainable Technology and Development (IEC)
Flameless combustion offers more promising results than conventional combustion, such as reduced ... more Flameless combustion offers more promising results than conventional combustion, such as reduced NOx emissions with enhanced thermal efficiencies. Flameless combustion of various gaseous fuels and furnace configurations have been fully investigated. However, the burning of liquid fuel flameless combustion is still scarce and not fully explored due to its complex processes such as atomization, evaporation, and mixture formation before combustion takes place. Despite the efforts and recent developments in this area, it is still essential to perform extensive studies on liquid fuel flameless combustion using various liquid fuels and flow configurations to improve the versatility of using liquid fuel as a source of energy. Several preliminary studies have reported numerous promising results of using liquid fuel in both small and complex designs. However, research in this area is still in the early stages, and thorough investigations are required, especially in simple and large burners t...
Flameless combustion is a state-of-the-art combustion technique that provides uniform temperature... more Flameless combustion is a state-of-the-art combustion technique that provides uniform temperature distribution while increasing efficiency and reducing emissions. An internally preheated swirling flameless burner (IPSFC) operating in flameless mode has been developed and tested to provide improved combustion characteristics and very low pollutant emissions. The IPSFC burner was operated at a heat input of 7 kW to 15 kW with a preheated combustion temperature. In the study, the effects of combustion air with and without preheating on gaseous fuel combustion characteristics are investigated for the six cases: SFR2, SFR4, SFR42, PSFR2, PSFR4 and PSFR42. The results show that the best configuration for a flameless burner is the SFR42 case, a vortex burner with four tangential air inlets, 12 axial air inlets, and 11 coaxial fuel inlets. The preheated air was found to increase the thermal efficiency of the process by about 10% compared to the process without preheating but at the cost of ...
Cogent Engineering, 2021
Abstract Efficient monitoring of combustion process is a key for regulating emissions from engine... more Abstract Efficient monitoring of combustion process is a key for regulating emissions from engine as well as achieving fuel economy. Various non-intrusive methods of diagnosis for engines include monitoring of noise, and vibrations emitted are attractive options that are cheap, reliable, and need no modifications in the engine set up under test. Combustion process occurring inside combustion chamber of engine provides important information about cyclic efficiency, heat losses, as well as noise and vibration (NVH) performance of engines. Earlier NVH aspects were thought to closely correlate with the development of in-cylinder pressure inside combustion chamber. However, there have been contradictions to this idea prompting the need for further evaluations. The presented work discusses a novel methodology that may be used for analysis of in-cylinder pressure development during the combustion process for a diesel engine. The in-cylinder pressure development in a small-sized diesel engine was analyzed with the aim to extract information about various indicators that characterize the development of combustion processes. Novel indices were developed based on noise, pressure, and vibrations signature of engines , which were much more correlated to combustion process development. The correlative relationship shows the effectiveness of the proposed methodology for condition monitoring for engines.
ATBU Journal of Science, Technology and Education, 2020
With widespread calls for improved development of clean energy sources, solar thermal collectors ... more With widespread calls for improved development of clean energy sources, solar thermal collectors are continuously receiving renewed attention being one of the easiest means of converting solar radiation to heat. Planar reflectors are often employed in flat plate collectors in order to boost solar radiation captured. Significant improvement in efficiency can be achieved if reflectors are positioned optimally. A model that predicts the additional solar gain using reflectors on the eastern and western side of a collector was developed using engineering equation solver (EES) and transient system simulation (TRNSYS) software. Simulations were carried out for various reflector angles using Zaria weather data and the monthly reflector tilts for optimum solar gain were obtained through parametric studies. The results show that solar radiation received by collector can be enhanced with the reflectors throughout the year except for the month of July for both reflectors and August for the eas...
ATBU Journal of Science, Technology and Education, 2020
This experiment was conducted to determine the effects of angle of attack on lift, drag, pitching... more This experiment was conducted to determine the effects of angle of attack on lift, drag, pitching moment and pressure distribution during the flow of NACA 4415 wing model of chord length of 200mm, leading edge radius of 4.96mm and span of length 450 mm using a low speed open return wind tunnel with test section of 0.47m width, 0.47m height and 1.27m length. The wing model was subjected to several tests at two different speeds of 15m/s and 25m/s which corresponds to two different Reynolds numbers of 1.8A—10 5 and 3.1A—10 5 respectively. The result showed that for both speeds, the coefficient of lift increased as angle of attack increased and the maximum lift coefficient was 1.45 at 15m/s while at 25m/s, the coefficient of lift is 1.40, which is slightly less than that at 15m/s. The coefficient of drag also increased as the angle of attack increased from 0 0 to 18 0 and the maximum drag was 0.15 at 15m/s, while at 25m/s, the coefficient of drag is approximately 0.2 which showed that t...
Nuclear Engineering and Design, 2019
The International Atomic Energy Agency emphasizes on the safety assessment of fires involved by t... more The International Atomic Energy Agency emphasizes on the safety assessment of fires involved by the crash of a large commercial aircraft into a nuclear power plant. In the guideline, it requires that a total load of aviation fuel that causes damage to exterior plants' components should be included when performing the initial stages of the nuclear plant site evaluation process and over the entire lifetime of the plant operation. In this study, the effects of jet fuel and hydrogen-induced external explosion on a nuclear power plant was investigated and analyzed. A turbulence model based on Reynolds-averaged Navier-Stokes CFD solver, called FLACS, was used to determine the explosion parameters within the plant vicinity. The simulation results of key explosion parameters for butane explosion show a deflagrative overpressure of 0.27 bar and impulse load of 0.015 bar•s at some preselected position. An elevated local temperature of about 2030 K is recorded for this fuel. Hydrogen explosion causes a maximum overpressure of 0.37 bar, and a maximum positive pressure impulse load of 0.022 bar•s at the exterior walls of building structures. From the findings, it showed that building obstacles have a substantial influence on the evolution of fireball and overpressure propagation. The computed overpressure and impulsive loadings observed are capable of causing substantial structural damages and vulnerabilities. A significantly elevated flame temperature recorded would have a harmful effect on the safety function of structures, systems and components (SSCs) that are needed to execute reactor shutdown. The findings of this study may be used to revisit the safety evaluation of a nuclear power plant (NPP) site with regards to the risks and consequences associated with external explosion due to aircraft impact. It is also useful in designing the layout of the NPP and site placement of relevant items important to safety.
ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
The application of Geographic Information System (GIS) and election is a study that stresses geos... more The application of Geographic Information System (GIS) and election is a study that stresses geospatial aspects which gives support to election boundaries, election information management system along with GIS analysis in election boundaries. This article, as a concept, explains the role and function of GIS and geopolitics as an introduction to examine the election pattern in Malaysia. This study was aimed at understanding the issue that influenced youth voters in DUN Nusajaya to cast their votes in General Election, thus charting new strategies for future election. In doing so, nine issues are carefully selected and analysed from a geographical perspective by using GIS method. Socio-demographic data, issues influenced and assessment of state political figure, are used to explore geographic variability in relationships between each variable at a detailed spatial level. Spatial analysis using geographically weighted regression (GWR) was employed, which enables the investigation of local variations in voting patterns. The results demonstrate that assessment of state political figures do vary over geographic space and some of the variables that are traditionally assumed affect certain locations.
Atherosclerosis Supplements, 2010
ATBU Journal of Science, Technology and Education, 2020
Airport operations are associated with various hazards among which fire outbreak is the most dang... more Airport operations are associated with various hazards among which fire outbreak is the most dangerous, cautions need to be taken in order to save lives and properties, and such can only be achieved by providing adequate, and sufficient maintenance exercise, in this study a survey of the fire safety department of the Mallam Aminu Kano International Airport, Kano airport was carried out, a questionnaires were administered to the rescue and firefighting personnel, and results of the survey were analyzed and discuss critically. Its shows that 62% of the respondents were not satisfied with the existing safety plans which indicate that plans were not provided as required by the standards. Based on the findings, it was conclude, that the airport has no fire safety management and contingency plans that meet up with the current standard, thus hindering seamless operation, and pose a threat to safety and wellbeing of the airport users.
2022 8th International Engineering Conference on Sustainable Technology and Development (IEC)
Flameless combustion offers more promising results than conventional combustion, such as reduced ... more Flameless combustion offers more promising results than conventional combustion, such as reduced NOx emissions with enhanced thermal efficiencies. Flameless combustion of various gaseous fuels and furnace configurations have been fully investigated. However, the burning of liquid fuel flameless combustion is still scarce and not fully explored due to its complex processes such as atomization, evaporation, and mixture formation before combustion takes place. Despite the efforts and recent developments in this area, it is still essential to perform extensive studies on liquid fuel flameless combustion using various liquid fuels and flow configurations to improve the versatility of using liquid fuel as a source of energy. Several preliminary studies have reported numerous promising results of using liquid fuel in both small and complex designs. However, research in this area is still in the early stages, and thorough investigations are required, especially in simple and large burners t...
Flameless combustion is a state-of-the-art combustion technique that provides uniform temperature... more Flameless combustion is a state-of-the-art combustion technique that provides uniform temperature distribution while increasing efficiency and reducing emissions. An internally preheated swirling flameless burner (IPSFC) operating in flameless mode has been developed and tested to provide improved combustion characteristics and very low pollutant emissions. The IPSFC burner was operated at a heat input of 7 kW to 15 kW with a preheated combustion temperature. In the study, the effects of combustion air with and without preheating on gaseous fuel combustion characteristics are investigated for the six cases: SFR2, SFR4, SFR42, PSFR2, PSFR4 and PSFR42. The results show that the best configuration for a flameless burner is the SFR42 case, a vortex burner with four tangential air inlets, 12 axial air inlets, and 11 coaxial fuel inlets. The preheated air was found to increase the thermal efficiency of the process by about 10% compared to the process without preheating but at the cost of ...
Cogent Engineering, 2021
Abstract Efficient monitoring of combustion process is a key for regulating emissions from engine... more Abstract Efficient monitoring of combustion process is a key for regulating emissions from engine as well as achieving fuel economy. Various non-intrusive methods of diagnosis for engines include monitoring of noise, and vibrations emitted are attractive options that are cheap, reliable, and need no modifications in the engine set up under test. Combustion process occurring inside combustion chamber of engine provides important information about cyclic efficiency, heat losses, as well as noise and vibration (NVH) performance of engines. Earlier NVH aspects were thought to closely correlate with the development of in-cylinder pressure inside combustion chamber. However, there have been contradictions to this idea prompting the need for further evaluations. The presented work discusses a novel methodology that may be used for analysis of in-cylinder pressure development during the combustion process for a diesel engine. The in-cylinder pressure development in a small-sized diesel engine was analyzed with the aim to extract information about various indicators that characterize the development of combustion processes. Novel indices were developed based on noise, pressure, and vibrations signature of engines , which were much more correlated to combustion process development. The correlative relationship shows the effectiveness of the proposed methodology for condition monitoring for engines.
ATBU Journal of Science, Technology and Education, 2020
With widespread calls for improved development of clean energy sources, solar thermal collectors ... more With widespread calls for improved development of clean energy sources, solar thermal collectors are continuously receiving renewed attention being one of the easiest means of converting solar radiation to heat. Planar reflectors are often employed in flat plate collectors in order to boost solar radiation captured. Significant improvement in efficiency can be achieved if reflectors are positioned optimally. A model that predicts the additional solar gain using reflectors on the eastern and western side of a collector was developed using engineering equation solver (EES) and transient system simulation (TRNSYS) software. Simulations were carried out for various reflector angles using Zaria weather data and the monthly reflector tilts for optimum solar gain were obtained through parametric studies. The results show that solar radiation received by collector can be enhanced with the reflectors throughout the year except for the month of July for both reflectors and August for the eas...
ATBU Journal of Science, Technology and Education, 2020
This experiment was conducted to determine the effects of angle of attack on lift, drag, pitching... more This experiment was conducted to determine the effects of angle of attack on lift, drag, pitching moment and pressure distribution during the flow of NACA 4415 wing model of chord length of 200mm, leading edge radius of 4.96mm and span of length 450 mm using a low speed open return wind tunnel with test section of 0.47m width, 0.47m height and 1.27m length. The wing model was subjected to several tests at two different speeds of 15m/s and 25m/s which corresponds to two different Reynolds numbers of 1.8A—10 5 and 3.1A—10 5 respectively. The result showed that for both speeds, the coefficient of lift increased as angle of attack increased and the maximum lift coefficient was 1.45 at 15m/s while at 25m/s, the coefficient of lift is 1.40, which is slightly less than that at 15m/s. The coefficient of drag also increased as the angle of attack increased from 0 0 to 18 0 and the maximum drag was 0.15 at 15m/s, while at 25m/s, the coefficient of drag is approximately 0.2 which showed that t...
Nuclear Engineering and Design, 2019
The International Atomic Energy Agency emphasizes on the safety assessment of fires involved by t... more The International Atomic Energy Agency emphasizes on the safety assessment of fires involved by the crash of a large commercial aircraft into a nuclear power plant. In the guideline, it requires that a total load of aviation fuel that causes damage to exterior plants' components should be included when performing the initial stages of the nuclear plant site evaluation process and over the entire lifetime of the plant operation. In this study, the effects of jet fuel and hydrogen-induced external explosion on a nuclear power plant was investigated and analyzed. A turbulence model based on Reynolds-averaged Navier-Stokes CFD solver, called FLACS, was used to determine the explosion parameters within the plant vicinity. The simulation results of key explosion parameters for butane explosion show a deflagrative overpressure of 0.27 bar and impulse load of 0.015 bar•s at some preselected position. An elevated local temperature of about 2030 K is recorded for this fuel. Hydrogen explosion causes a maximum overpressure of 0.37 bar, and a maximum positive pressure impulse load of 0.022 bar•s at the exterior walls of building structures. From the findings, it showed that building obstacles have a substantial influence on the evolution of fireball and overpressure propagation. The computed overpressure and impulsive loadings observed are capable of causing substantial structural damages and vulnerabilities. A significantly elevated flame temperature recorded would have a harmful effect on the safety function of structures, systems and components (SSCs) that are needed to execute reactor shutdown. The findings of this study may be used to revisit the safety evaluation of a nuclear power plant (NPP) site with regards to the risks and consequences associated with external explosion due to aircraft impact. It is also useful in designing the layout of the NPP and site placement of relevant items important to safety.
ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
The application of Geographic Information System (GIS) and election is a study that stresses geos... more The application of Geographic Information System (GIS) and election is a study that stresses geospatial aspects which gives support to election boundaries, election information management system along with GIS analysis in election boundaries. This article, as a concept, explains the role and function of GIS and geopolitics as an introduction to examine the election pattern in Malaysia. This study was aimed at understanding the issue that influenced youth voters in DUN Nusajaya to cast their votes in General Election, thus charting new strategies for future election. In doing so, nine issues are carefully selected and analysed from a geographical perspective by using GIS method. Socio-demographic data, issues influenced and assessment of state political figure, are used to explore geographic variability in relationships between each variable at a detailed spatial level. Spatial analysis using geographically weighted regression (GWR) was employed, which enables the investigation of local variations in voting patterns. The results demonstrate that assessment of state political figures do vary over geographic space and some of the variables that are traditionally assumed affect certain locations.
Atherosclerosis Supplements, 2010
ATBU Journal of Science, Technology and Education, 2020
Airport operations are associated with various hazards among which fire outbreak is the most dang... more Airport operations are associated with various hazards among which fire outbreak is the most dangerous, cautions need to be taken in order to save lives and properties, and such can only be achieved by providing adequate, and sufficient maintenance exercise, in this study a survey of the fire safety department of the Mallam Aminu Kano International Airport, Kano airport was carried out, a questionnaires were administered to the rescue and firefighting personnel, and results of the survey were analyzed and discuss critically. Its shows that 62% of the respondents were not satisfied with the existing safety plans which indicate that plans were not provided as required by the standards. Based on the findings, it was conclude, that the airport has no fire safety management and contingency plans that meet up with the current standard, thus hindering seamless operation, and pose a threat to safety and wellbeing of the airport users.