Dr. Swarup Kumar Nayak has 9 years and 01 months of experience in education, teaching and research in Odisha, India since June, 2013. Dr. Swarup has completed his graduation in (Mechanical Engineering) from Kakatiya university, Warangal, India and post graduation in (Thermal Engineering) from KIIT University, Odisha, India. He has also been awarded with Ph.D. degree from SME, KIIT University, Odisha, India since September, 2019. His research areas includes: Biomass and Bioenergy, alternative fuels, combustion behavior, fuels and emissions. He has authored more than 49 SCOPUS / SCI papers related to engine combustion, dual fuel technology, fuels and emission in International Journals of high repute. He has published 01 International patent and 01 Indian patent to his credit.
EDUCATION
B.Tech - Kakatiya University - 2008-2012 Batch
M.Tech - KIIT University - 2012-2014 Batch
Ph.D. - KIIT University - 2015-2019 Batch
RESEARCH INTERESTS
Alternative Fuels and Emissions
Biomass Energy and Biorefinery
Fuels and Lubricants
Energy Sources and Technology
Greenhouse gas mitigation
69
Scopus Publications
Scopus Publications
Investigation on Performance, Emission and Failure Analysis of Piston using Thermal Barrier Coatings: A Review A.J. Biswal, S. Pradhan, S.K. Nayak, M. Arya International Journal of Vehicle Structures and Systems, 2026 The primary purpose of the thermal barrier coating (TBC) is to shield the metallic components above 1000 degC. Also, it can reduce emissions, improve efficiency, mitigate damage and abrasion in internal combustion engines. To evaluate and improve the durability and reliability of TBC, it is important to understand the fundamental degradation and failure mechanisms of TBC. To create a low heat rejection engine, the TBCs have been sprayed on top of the piston. TBC develops a complication in the morphology and the uneven cooling leads to pores and microcracks in the coating. Oxidation occurs, when TBCs are exposed to high temperatures. Various failure mechanisms of TBCs are analyzed due to oxidation, hot corrosion, phase transitions, residual stresses and sintering effect. Few strategies are outlined in order to mitigate the negative consequences as above and to increase the life span of TBCs.
Towards Sustainable Development Goals: Application of Hydrogen-Enriched Mahua Biodiesel/Diesel Blend to Dual-Fuel Diesel Engine Anh Tuan Hoang, Swarup Kumar Nayak, Milan Vujanović, M. Olga Guerrero‐Pérez, Enrique Rodríguez‐Castellón, María Cruz López‐Escalante, Shams Forruque Ahmed, Hady Hadiyanto, Van Chinh Luu, Van Nhanh Nguyen, Xuan Phuong Nguyen, Dao Nam Cao Global Challenges, 2025 This study investigates the influence of hydrogen (H2) enrichment on the performance, combustion, and emission characteristics of a dual‐fuel diesel engine operated with Mahua biodiesel/diesel blend (BDf20), in which H2 is injected into the intake manifold at flow rates of 4, 6, 8, 10, and 12 L min−1 under varying engine loads. As a result, the optimum engine performance is achieved at 10 L min−1 H2. At a peak load of 5.02 kW, BDf20 + H2 (10 L min−1) improves brake thermal efficiency (BTE) by 16.75%, and reduces brake specific fuel consumption (BSFC) by 10.83% compared to conventional diesel. For emission characteristics, unburnt hydrocarbons (HC), carbon monoxide (CO), and carbon dioxide (CO2) decrease by 42.65, 44.74, and 20.91%, respectively, although NOx emissions increased by 17.1% due to higher combustion temperatures. Moreover, combustion characteristics show a 9.91% rise in peak in‐cylinder pressure, a 20.82% increase in heat release rate, and an 8.26% longer ignition delay period. The results confirm the effectiveness of H2 enrichment in improving combustion performance while significantly reducing pollutant emissions, showing that combining H2 with biodiesel enhances the global Sustainable Development Goals (SDG) by advancing clean and renewable energy solutions.
Assessment of engine characteristics in dual-fuel mode using post-mixed biodiesel and coconut shell producer gas Chinmaya Satapathy, Swarup Kumar Nayak, Purna Chandra Mishra, Nandagopal Kaliappan, K․Kamakshi Priya Results in Engineering, 2025 • Dual-fuel CI engine tested with mahua–karanja biodiesel and coconut shell gas. • MBD20 + producer gas reduced NOₓ by 18.95 % and smoke by 16.48 % at full load. • Brake thermal efficiency dropped moderately in biodiesel dual-fuel configurations. • Peak pressure and HRR decreased due to lower cetane rating of producer gas. • Supports SDGs by promoting clean, renewable fuels in diesel engine applications. This study presents a detailed evaluation of a four-stroke compression ignition engine operating in a dual-fuel mode using biodiesel blends and producer gas. The biodiesel blends were formulated from mahua and karanja oil methyl esters, while the producer gas was derived from coconut shells. A Kirloskar TAF1 diesel engine was employed to analyze performance, combustion characteristics, and emission behavior under various load conditions, with a constant producer gas flow rate ensuring test consistency. The research compared the dual-fuel performance of biodiesel blends against conventional diesel. Among the tested configurations, the MBD20 blend (20 % biodiesel) with 1.6 kg/h of producer gas exhibited specific operational patterns. At higher engine loads, this combination led to a 13.95 % increase in brake-specific fuel consumption (BSFC) and a 20.89 % decrease in brake thermal efficiency (BTE) relative to neat diesel, indicating a trade-off in thermal performance and fuel economy. However, emission characteristics showed marked improvements. Smoke opacity decreased by 16.48 %, and nitrogen oxide (NOₓ) emissions dropped by 18.95 %, highlighting the potential of cleaner combustion. Conversely, emissions of carbon monoxide (CO) and unburnt hydrocarbons (HC) rose by 44.45 % and 45.09 %, respectively, due to partial combustion under dual-fuel conditions. The integration of renewable biodiesel with producer gas in diesel engines demonstrates promising environmental benefits. While some compromises in efficiency exist, this dual-fuel strategy presents a sustainable and cleaner alternative to fossil diesel, aligning with energy diversification and emission reduction goals.
Experimental insights into injection timing effects upon VCR diesel engine fuelled with injected waste cooking oil ethyl ester-diesel blends and induced biogas operated in dual fuel mode Prasant Kumar Patra, Swarup Kumar Nayak, Purna Chandra Mishra, Ganesan Subbiah, Nandagopal Kaliappan, Kamakshi Priya Results in Engineering, 2025 • Dual-fuel CI engine tested using WCOEE as pilot and biogas as inducted fuel. • Injector timing varied to assess performance, combustion, and emission behavior. • Optimal timing improved BTE and reduced NOx, CO, and smoke emissions. • Peak pressure and HRR enhanced at 25°CA bTDC injection in dual-fuel mode. • Biogas induction enabled smoother combustion with reduced NOx and smoke levels. This study investigates the dual-fuel operation of a single-cylinder, four-stroke, 5.2 kW variable compression ratio (VCR) diesel engine fueled with a 20% blend of waste cooking oil ethyl ester (WCOEE_20) and diesel as pilot fuel, and biogas (1.2 kg/h) as the inducted secondary fuel. The study aims to integrate renewable fuels into conventional diesel engines, promoting both efficiency and sustainability. Biogas was introduced through the intake manifold, while WCOEE_20 was directly injected into the combustion chamber. Experiments were performed at 1500 rpm and a compression ratio of 17.5:1, across varied injection timings (21°, 23°, 25°, and 27°CA bTDC) to identify the optimal operating condition for enhanced combustion, performance, and emission behavior. Among all test cases, WCOEE_20+DFM25°CA exhibited the best performance with a brake thermal efficiency (BTE) of 27.55%—an improvement of 10.51% over WCOEE_20+DFM23°, while 7.61% lower than diesel operated in natural aspirated mode. This configuration reduced brake specific fuel consumption (BSFC) by 15.33%, and exhaust gas temperature (EGT) increased by 3.28%, compared to WCOEE_20+DFM23° while, 34.77% increase in BSFC and 2.24% decrease in EGT observed for plain diesel, respectively. Emission analysis showed reductions in CO (15.79%), HC (16.0%), NOx (17.41%), and smoke opacity (28.49%) relative to diesel fuel. Compared to WCOEE_20+DFM23°, smoke opacity decreased by 5.52%, while NOx increased slightly by 9.67%. Combustion analysis revealed that WCOEE_20+DFM25° caused a 0.83% and 2.27% increase in ignition delay period (IDP) over diesel and WCOEE_20+DFM23°, respectively, and combustion duration (CD) increased by 6.97% and decreased by 2.76%. Heat release rate (HRR) and cylinder pressure (CP) were found to be 3.58% and 13.22% higher than WCOEE_20+DFM23°, while 1.88% lower and 10.02% higher than normal diesel fuel in natural mode of aspiration. These findings demonstrate the potential of WCOEE_20+DFM25° as a cleaner and efficient alternative for diesel engine operation, supporting the United Nations Sustainable Development Goals (SDG) 7 (Affordable and Clean Energy) and SDG 13 (Climate Action).
Combustion and emission characteristics of a hydrogen-assisted dual-fuel diesel engine running on garcinia gummi-gutta methyl ester-diesel blends Swarup Kumar Nayak, Purna Chandra Mishra, Ganesan Subbiah, Damanjeet Aulakh, Yuvarajan Devarajan Case Studies in Thermal Engineering, 2025 This research investigates the feasibility of using Garcinia gummi-gutta methyl ester (GGME) blends in conjunction with hydrogen (H 2 ) as an induction gaseous fuel in a dual-fuel diesel engine. GGME was blended with conventional diesel in varying proportions (10 %, 15 %, 20 %, 25 %, and 30 % v/v) to evaluate their performance and emission characteristics. Hydrogen gas, stored in a cylinder, was inducted into the combustion chamber at a fixed injection rate of 5 L/min for all test fuels using an electronic gas injector. The combination of GGME and H 2 gas (5 L/min) demonstrated superior overall performance compared to conventional diesel. Among the various blends tested, GGME_15 + H 2 (5 L/min) exhibited the most promising outcomes. Combustion analysis revealed a heat release rate (HRR) of 70.98 J/°CA and a peak in-cylinder pressure (In-CP) of 79.72 bar at 344°CA for this blend. At maximum engine load, GGME_15 + H 2 (5 L/min) achieved a 5.54 % increase in brake thermal efficiency (BTE) and a 26.67 % reduction in brake specific energy consumption (BSEC) compared to diesel. In terms of emission characteristics, GGME_15 + H 2 (5 L/min) significantly reduced carbon monoxide (CO) by 21.05 %, unburnt hydrocarbons (UBHC) by 13.04 %, and smoke opacity by 25.61 %. However, these benefits came with a 5.12 % increase in nitrogen oxides (NOx) and a 25.64 % rise in carbon dioxide (CO 2 ) emissions compared to diesel. The induction of hydrogen gas with optimally blended GGME-diesel fuels offers a viable alternative to conventional diesel. This approach enhances engine performance, reduces greenhouse gas emissions, and contributes to energy security and sustainability, making it a promising solution for future energy needs. • GGME-diesel blends were tested with H 2 gas induction. • Hydrogen inducted at (5 L/min) using electronic injector. • GGME_15 + H 2 showed best performance and combustion traits. • BTE increased by 5.54 % and BSEC reduced by 26.67 %. • CO, UBHC, and smoke reduced; slight rise in NOx and CO2 observed.
Influence of diglyme and cumene additives upon emission and combustion behaviour of diverse biodiesel fuelled diesel engine Swarup Kumar Nayak, Dinesh Babu Munuswamy, Ganesan Subbiah, Mallireddy Naresh, Yuvarajan Devarajan Results in Engineering, 2025 • MMEs with additives improve combustion, efficiency, and reduce NOx and emissions. • Diglyme (DG) shortens ignition delay, enhances combustion duration, and boosts BTE by 8.77 %. • NOx emissions decrease by 26.11 % (DG) and 19.97 % (CU) at peak loads compared to diesel. • Smoke opacity reduces by 25.79 % (DG) and 20.72 % (CU), ensuring cleaner exhaust. • HC and CO emissions drop by 81.25 % and 53.52 % (DG) versus diesel under maximal load. The growing need for sustainable and eco-friendly fuels aligns with global efforts to achieve the United Nations Sustainable Development Goals (SDGs), particularly SDG 7 (Affordable and Clean Energy), SDG 13 (Climate Action), and SDG 12 (Responsible Consumption and Production). This study addresses these goals by investigating the potential of biodiesel blends supplemented with innovative fuel additives to improve engine performance and reduce environmental impact. Specifically, the effects of diglyme (DG) and cumene (CU) as fuel additives on the combustion, performance, and emission characteristics of diesel engines fueled with jojoba methyl ester (JME), polanga oil methyl ester (PME), and their blended variant mixed methyl ester (MME) were evaluated. Experiments were conducted on a single-cylinder, 4-stroke, water-cooled, direct injection diesel engine operating at a constant speed of 1500 rpm and injection timing of 21ºbTDC under varying load conditions (0–5.02 kW). DG (5 % vol./vol.) was used as a cetane improver, while CU (5 % vol./vol.) functioned as an antioxidant. The results demonstrated that the blends MME15+CU5 and MME15+DG5 exhibited superior thermo-chemical properties and engine performance. MME15+CU5 achieved an 8.77 % increase in brake thermal efficiency (BTE), along with reductions in brake-specific energy consumption (BSEC) (5.64 %) and exhaust gas temperature (EGT) (12.02 %) at peak load. Similarly, MME15+DG5 delivered a 15.78 % improvement in BTE, with reductions in BSEC (17.11 %) and EGT (5.48 %). Emission analysis revealed significant reductions in CO (53.52 %), HC (81.25 %), NOx (26.11 %), and smoke opacity (25.79 %) for MME15+DG5 compared to diesel. These findings underscore the potential of (diglyme and cumene) additives enhanced biodiesel blends as sustainable, efficient alternatives to conventional diesel, contributing to the reduction of greenhouse gas emissions (SDG 13) and fostering responsible energy production and consumption (SDG 12), while promoting access to clean energy solutions (SDG 7).
MICROSTRUCTURAL ANALYSIS AND SLIDING WEAR MECHANISM OF AZ91 HYBRID COMPOSITES INDUCED WITH SIC AND BLA REINFORCEMENTS Biswajeet Nayak, Thingujam Jackson Singh, Swarup Kumar Nayak, Meinam Annebushan Singh Composites Mechanics Computations Applications, 2025 This scientific inquiry delves into the wear behavior of hybrid composites fabricated from magnesium alloy (AZ91) that incorporates silicon carbide (SiC) and bamboo leaf ash (BLA), tailored for utilization in the aerospace and automotive sectors. AZ91 hybrid composites, consisting of varying weight fractions of SiC and BLA, were successfully manufactured employing the stir casting technique. The tribological responses were assessed via a pin-on-disc wear tester, with alterations in loads, sliding velocities, and a consistent sliding distance. The findings indicate that composites, reinforced with SiC and BLA particles, display improved resilience against wear when compared to both the unreinforced magnesium alloy and single-phase composites. The hybrid composites incorporating 2 wt% SiC and 4 wt% BLA exhibit significant enhancements in tribological properties. The observed increased durability against wear was mainly credited to the incorporation of hard reinforcements, particularly SiC, along with the utilization of BLA obtained from agricultural waste. The composite materials were thoroughly evaluated to study their surface characteristics, internal structure, phase composition, and elemental makeup. The composite demonstrated improved wear resistance due to refined grain structure and even dispersion of reinforcement particles. Higher applied loads resulted in increased wear rate, while delamination and abrasion were identified as primary wear mechanisms. At elevated sliding velocities, an intermixed layer acted as a protective barrier against surface wear. The composites outperformed the base matrix alloy in terms of wear resistance, due to heightened hardness and enhanced interfacial bonding between the matrix and reinforcement.
A remarkable review of the effect of lockdowns during COVID-19 pandemic on global PM emissions Van Vang Le, Thanh Tung Huynh, Aykut Ölçer, Anh Tuan Hoang, Anh Tuan Le, Swarup Kumar Nayak, Van Viet Pham Energy Sources Part A Recovery Utilization and Environmental Effects, 2025 COVID-19 was labeled as a global pandemic when it caused a larger number of death cases in the world. Facing the dangerous and serious global pandemic, many countries have issued the nationwide loc...
Evaluating ignition improvers on performance and emissions of Calophyllum inophyllum biodiesel in turbocharged diesel engines Swarup Kumar Nayak, Yuvarajan Devarajan Results in Engineering, 2024 • Di-tertiary-butyl peroxide, n-pentanol, and n-butanol evaluated as potential ignition improver additives • Analysis of the impact of biodiesel blends containing ignition improvers on engine performance • BD10+DTBP20 blend exhibits physicochemical properties closely matching those of diesel fuel • BD20+DTBP20 shows increased BSFC, reduced BTE, and lower EGT compared to diesel fuel • Significant enhancements in combustion efficiency and emission reductions observed with BD20+DTBP20 The rising demand for eco-friendly fuels has sparked interest in biodiesel as a sustainable alternative to conventional diesel. This study evaluates the effects of various additives—di-tertiary-butyl peroxide (DTBP), n-pentanol, and n-butanol—blended with Calophyllum inophyllum biodiesel-diesel blends on diesel engine performance, combustion, and emissions. The engine's compression ratio, injection timing, injector opening pressure, and speed were kept constant. DTBP proved to offer the best balance between performance and emissions. The BD20+DTBP20 blend showed minor differences from regular diesel in heating value, density, and viscosity, with reductions in brake thermal efficiency by 2.83% and a 9.67% increase in brake-specific fuel consumption at maximum load. Emission analysis revealed reductions of 58.52% in CO, 41.17% in HC, and 33.89% in smoke, with only a slight increase in NOx by 1.97%. Combustion analysis indicated a 68.65% longer ignition delay, with reductions in in-cylinder pressure by 5.47% and heat release rate by 9.07%. These findings suggest that the BD20+DTBP20 blend meets emission standards and performs comparably to diesel, offering immediate applicability for existing diesel engines. This study supports global sustainability efforts by reducing dependence on fossil fuels and mitigating environmental pollution, contributing to international goals like the UN SDGs and stringent emissions standards such as Euro VI and BS VI. The research provides critical insights for future biodiesel development with ignition improvers, promoting sustainable energy transitions in the transportation and industrial sectors.
Influence of storage period on the thermal and oxidation stability of Jatropha biodiesel and their blends International Journal of Mechanical Engineering and Technology, 2018
Biodiesel vs diesel: A race for the future Swarup Kumar Nayak, Gyana Ranjan Behera, Purna Chandra Mishra, Sagar Kumar Sahu Energy Sources Part A Recovery Utilization and Environmental Effects, 2017
Experimental evaluation on Jatropha biodiesel blends as an alternative fuel for engine application International Journal of Mechanical Engineering and Technology, 2017
Experimental investigation on performance and emission characteristics of a diesel engine fuelled with karanja oil methyl ester using additive International Journal of Engineering and Technology, 2013
