Article
Chemistry, Physical
A. C. Rajesh, S. Jeyakumar, Kandasamy Jayaraman, Mehmet Karaca
Summary: This study investigates the flow performance of a dual wall-mounted cavities in a strut-injector mounted scramjet combustor under steady-state and transient reacting conditions. The research compares two-dimensional Reynolds Averaged Navier-Stokes approach and Delayed Detached Eddy Simulation for computing the steady and unsteady flow characteristics. The results show that the dual cavities arrangement accelerates complete combustion and modifies the flow structures due to intense shock shear layer interactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Aerospace
Yu Dan, Zhi-qiang Sheng, Lan Zhang, Liang-ze Lu
Summary: This study proposes a scramjet combustor with two ramps and a cavity, and validates its combustion performance through numerical simulations. The results show that the combined effects of the ramps and cavity increase the penetration height of the fuel jet and improve the combustion efficiency.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Energy & Fuels
Naresh Relangi, Antonella Ingenito, Suppandipillai Jeyakumar
Summary: This paper investigates the effect of cavity-based injection in an axisymmetric supersonic combustor using numerical simulation. The results show that transverse injection enhances combustion efficiency in the cavity region while also increasing total pressure loss.
Article
Thermodynamics
Tushar Kant Swain, Anil P. Kishan, Sudarshan Kumar
Summary: This paper proposes and investigates a new asymmetric strut-based fuel injection for enhanced fuel-air mixing and combustion in supersonic combustors. The asymmetry in the strut creates vortices along the Z-axis, resulting in improved mixing. The presence of vortices significantly increases the mixing and combustion efficiency.
COMBUSTION SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Suneetha Lakka, Pitambar Randive, K. M. Pandey
Summary: The study compares the combustion characteristics of combustors with and without cavities and investigates the impact of cavity parameters on the performance of a strut-based scramjet combustor. The research reveals the formation of a strong recirculation zone in the cavity region, improving mixing and combustion efficiency.
Article
Energy & Fuels
Obula Reddy Kummitha, K. M. Pandey
Summary: The global demand for enhanced scramjet engine performance is increasing, with the main challenge being the mixing of fuel and air. Research has shown that using a wavy wall surface and double strut fuel injector can significantly improve mixing efficiency and combustion phenomenon.
Article
Thermodynamics
A. C. Rajesh, S. Jeyakumar, Kandasamy Jayaraman, Mehmet Karaca, A. Antony Athithan
Summary: The effect of dual cavity locations with strut injection configuration on supersonic flow under reacting conditions is evaluated numerically. The study investigates the shock wave patterns and their association with shear layer mixing features at different locations of the top wall cavity and bottom wall cavity. The flow pattern, static pressure and temperature distributions, and performance analysis of the dual cavity designs associated with the results of the DLR scramjet are analyzed.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Physical
Prasanth P. Nair, Vinod Narayanan, Abhilash Suryan
Summary: In a study on Scramjet engines, the placement of trailing struts plays a crucial role in enhancing combustion efficiency. Different strut configurations have varying effects on combustion performance, with configurations introducing high-pressure regions outperforming others. The addition of trailing struts leads to increased combustion efficiency and total pressure loss in the engine.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Sanguk Lee, Joonsik Hwang, Choongsik Bae
Summary: The energy paradigm is shifting towards carbon-free and low-emission alternative fuels, and hydrogen is considered a promising option due to its favorable fuel properties. Direct injection technology is identified as the best approach for applying hydrogen in combustion engines, but studies on hydrogen jet behavior in direct injection systems are lacking. Therefore, this study aimed to comprehensively assess hydrogen jet behavior through experiments and computational approaches.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2023)
Article
Engineering, Aerospace
Guangli Fan, Adel Almarashi, Peixi Guo, Nidal H. Abu-Hamdeh, Abdullah M. Abusorrah, R. Moradi
Summary: The study investigates the impacts of high-velocity air stream interacting with cross fuel jet on fuel mixing and flame stability. Computational fluid dynamic method is used to model the flow structure, revealing that adding an inclined ramp upstream can enhance fuel mixing effectiveness and distribution uniformity.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Thermodynamics
A. Antony Athithan, S. Jeyakumar
Summary: This numerical study analyzes the performance of double ramps in a strut injection scramjet combustor. The results show that the dual ramps can decelerate the flow downstream of the combustor, creating recirculation regions that help in anchoring the flame. Additionally, the combustion efficiency increases as the ramps are positioned downstream of the strut injector.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2023)
Article
Engineering, Aerospace
Zhongliang Shen, Shuaixian Yu, Shichuang Zheng, Taher A. Nofal, Awad Musa, Z. Li
Summary: This study investigates the impact of an upstream inclined ramp on the fuel mixing mechanism of multi-jet configurations in supersonic crossflow. The results show that the ramp has a more significant effect on the circulation factor and mixing performance in the low jet space.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Singeetham Pranaykumar, Dinesh Mengu, Akshay Prakash
Summary: An innovative air-throttling injection mechanism is proposed and investigated in this study, aiming to improve the combustion efficiency and mixing efficiency in scramjets. The mechanism shows promising results in terms of flame stabilization, combustion efficiency, and shorter ignition length even at higher Mach numbers.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Metallurgy & Metallurgical Engineering
Zhe Zhang, Xing Jin, Wen-xiong Xi
Summary: The study analyzed the combustion characteristics under different injection conditions, revealing that an increase in total pressure of strut fuel injection leads to a decrease in combustion efficiency. However, increasing the total pressure of strut fuel injection within a proper range can expand the combustion area downstream. Increasing the total pressure of cavity fuel injection within the range of 0.5-2.0 MPa expands the combustion range and improves combustion efficiency, but excessive total injection pressure of cavity fuel can result in a sharp drop in efficiency. Increasing the total injection pressure of the plasma jet raises the height of the cavity shear layer and improves the equivalence ratio of the gas mixture in the cavity, with a maximum combustion efficiency of 82.1% achieved at a total pressure of 1.25 MPa. The combustion-assisted effect of different plasma jet media varies significantly, with O2 having the most significant effect on the combustor.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Thermodynamics
Z. Li, Jiaxuan Leng, Nidal H. Abu-Hamdeh, Mohammed N. Ajour, Awad Musa, Randa I. Hatamleh
Summary: This study extensively investigates the effects of the inner strut fin in the nozzle injector on the distribution and penetration mechanism of fuel jet in supersonic cross air stream, and reveals the improvement of fuel mixing mechanism with the presence of the strut. Computational fluid dynamic simulations are conducted to examine different nozzle types and strut fin heights on the fuel mixing mechanism. The findings show that the use of the inner fin enhances fuel mixing, with the 3-lobe injector achieving a higher efficiency (35%) compared to the 4-lobe and circular nozzles.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Bilal Khalid, Mariusz Urbanski, Monika Kowalska-Sudyka, Elzbieta Wyslocka, Barbara Piontek
Summary: The study found that in Poland, environmental concern, ease of use, financial incentives, and relative advantage have a positive and significant influence on the adoption of renewable energy technology, while initial cost and risk, and trust for renewable energy do not significantly influence renewable energy adoption.
Article
Multidisciplinary Sciences
V Srivani, A. Hariharasudan, Nishad Nawaz, Sabina Ratajczak
Summary: This study aims to explore the impact and importance of Education 4.0 for improving English language learning among students in India, with a focus on Hyderabad City. The study uses quantitative research methods and collects data through questionnaires and post-assessments. The findings indicate a direct correlation between students' perception and the implementation of Education 4.0 in English language learning.
Article
Business
Pavol Durana, Romualdas Ginevicius, Mariusz Urbanski, Ivana Podhorska, Milos Tumpach
Summary: The research identifies that enterprises in the Visegrad Four and the Baltics use earnings management to enhance competitiveness, demonstrating systematic but legal manipulation by management. Significant time differences in manipulation were found in these emerging countries, with a sharp increase observed in earnings management in V4 countries in 2014 and in the Baltics in 2016.
JOURNAL OF COMPETITIVENESS
(2021)
Article
Business
Mariusz Urbanski, Khawlah M. AL-Tkhayneh, Zurabi Shamugia
Summary: This research conducted a comparative analysis of foreign employment in companies operating in the UK, Poland, and UAE. The findings showed a similar trend in the increase of foreign employees in these three countries. The largest age group of foreign employees was 25-35 years, and the most common type of contract was fixed-term full-time employment. Manual labor jobs were the most common among foreigners.
ENTREPRENEURSHIP AND SUSTAINABILITY ISSUES
(2022)
Article
Thermodynamics
A. Antony Athithan, S. Jeyakumar
Summary: This numerical study analyzes the performance of double ramps in a strut injection scramjet combustor. The results show that the dual ramps can decelerate the flow downstream of the combustor, creating recirculation regions that help in anchoring the flame. Additionally, the combustion efficiency increases as the ramps are positioned downstream of the strut injector.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2023)
Article
Multidisciplinary Sciences
J. Sangeetha, S. Mohan, A. Hariharasudan, Nishad Nawaz
Summary: This study examines Intimate Partner Violence (IPV) through the personal experiences of Indian writer Meena Kandasamy and compares it with the Cycle of Violence theory. The findings highlight the need for government intervention and legal enforcement to protect women from abuse.
Article
Economics
Sunisa Junsawang, Wornchanok Chaiyasoonthorn, Mariusz Urbanski, Singha Chaveesuk
Summary: This paper examines the factors that affect consumer willingness to use emerging technologies in omnichannel and proposes a triangulation model using UTAUT2 and ECM Models. The study utilizes empirical data and finds that the factors have both direct and indirect influences on consumer acceptance of emerging technologies.
MONTENEGRIN JOURNAL OF ECONOMICS
(2022)
Article
Computer Science, Information Systems
B. Karthiga, Danalakshmi Durairaj, Nishad Nawaz, Thiruppathy Kesavan Venkatasamy, Gopi Ramasamy, A. Hariharasudan
Summary: This article proposes an intelligent intrusion detection system for Vehicular Ad hoc Network (VANET) using machine learning and deep learning approaches. The system is able to detect both known and unknown attacks with high accuracy and fast detection speed.
WIRELESS COMMUNICATIONS & MOBILE COMPUTING
(2022)
Article
Green & Sustainable Science & Technology
D. Sri Dhivya, A. Hariharasudan, Wided Ragmoun, Abdulaziz Abdulmohsen Alfalih
Summary: With globalization, industries around the world are adopting new technologies to simplify work, necessitating the preparation of students for the future workforce through an education system known as Education 4.0, which facilitates self-based learning through AI. The present study focuses on developing Business English communication skills using the Education 4.0 supported application, ELSA. A quasi-experimental research design was employed with a purposive sample of 99 management students from business schools. Pre- and post-tests were conducted using questionnaires, and the data were analyzed using SPSS. The results indicated significant improvement in listening skills and overall benefits from using Education 4.0.
Article
Language & Linguistics
Dhanuskodi Pandeeswari, Anandhan Hariharasudan
Summary: The study aims to delve into the postmodern perspective of liberal feminism in Preeti Shenoy's selected texts, which highlight the suffering and empowerment of women protagonists. The study adopts the concepts and methods of liberal feminism to analyze the works.
JORDAN JOURNAL OF MODERN LANGUAGES & LITERATURE
(2022)
Article
Geosciences, Multidisciplinary
Zuzana Simkova, Nadezda Petru, Mariusz Urbanski, Jan Sibert
Summary: Mining and processing of raw materials are essential for industrial value chains, and their importance is increasing with the global demand for raw materials. Despite the EU's long tradition and abundant resources, the utilization of certain critical raw materials is not optimal. The EU lacks capacity in mining, processing, and recycling, leading to high dependence on supplies from other regions. The COVID-19 crisis may drive the need for diversification and regionalization of production processes and seek economic sovereignty in strategic areas.
ACTA MONTANISTICA SLOVACA
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Antony A. Athithan, S. Jeyakumar, Sandeep Poddar
Summary: This study investigates the influence of double ramp's implications in the scramjet engine combustor walls and the use of strut injection technique under non-reacting flow conditions. The results show that the presence of ramps leads to higher wall static pressure values and the creation of subsonic zones, which enhance air-fuel mixing in the combustor.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Engineering, Industrial
Danalakshmi Durairaj, Lukasz Wroblewski, A. Sheela, A. Hariharasudan, Mariusz Urbanski
Summary: Power control and management are crucial in information technology, and the integration of machine learning algorithms in smart grid systems has enabled efficient power management and sustainable energy utilization. The proposed random-forest-based identification technique demonstrates significant improvements in locating power availability and quickly responding to requests, outperforming conventional energy management techniques in fault detection speed.
PRODUCTION ENGINEERING ARCHIVES
(2022)
Article
Economics
Mariusz Urbanski
Summary: This study compares the push and pull factors affecting migration between Poland and Romania. The findings show that pull factors, particularly economic and political ones, have a greater effect on migration. Economic factors are the major reasons for migration in all countries, and political issues also influence the control of migration.
Article
Social Sciences, Interdisciplinary
Jeya Sankar Sangeetha, Sengottaian Mohan, Anandhan Hariharasudan, Anandhan Antony Athithan
Summary: This study focuses on the deadliest form of violence, structural violence, and reveals its multifaceted impacts in various aspects such as political, economic, gender, and health through cases and surveys. The findings suggest that collective efforts and legal interventions can help combat structural violence by raising awareness in impoverished communities and providing adequate services and resources.
PERTANIKA JOURNAL OF SOCIAL SCIENCE AND HUMANITIES
(2022)
