Suresh Devunuri

Bio: Suresh Devunuri is an academic researcher from VIT University. The author has contributed to research in topics: Lean burn & Gasoline. The author has an hindex of 2, co-authored 4 publications receiving 6 citations.

Investigation on Lean-Burn Spark-Ignition Engine with Methanol/Ethanol—Gasoline Blends

Abstract: The aim of the current study was to know the performance and emission behavior of a modified single-cylinder lean-burn SI engine from a stationary diesel engine, runs with gasoline, binary and ternary mixtures of alcohol with gasoline. The tests were looked at 100% throttle open condition, at 10.5:1 compression ratio and fixed RPM of 1500 at different levels of intake charge through manifold injection. The results showed that ethanol-gasoline mixture (10% by volume 10%) was shown an improved performance characteristics compared with methanol-gasoline blend (by volume) and ternary blend of 5% of ethanol—5% methanol—(90%) gasoline blend (by volume) and also a noticeable extension in the lean operation with alcohol-gasoline mixtures. The exhaust emissions, HC and CO were reduced while CO2 and NOx emissions were increased owing to better combustion efficiency and high temperatures in the cylinder. Overall it is accomplished that low concentration of alcohol blending with gasoline enhances performance and reduces emissions under the lean operation of SI engine.

An Overview of the Classification, Production and Utilization of Biofuels for Internal Combustion Engine Applications

Abstract: Biofuel, a cost-effective, safe, and environmentally benign fuel produced from renewable sources, has been accepted as a sustainable replacement and a panacea for the damaging effects of the exploration for and consumption of fossil-based fuels. The current work examines the classification, generation, and utilization of biofuels, particularly in internal combustion engine (ICE) applications. Biofuels are classified according to their physical state, technology maturity, the generation of feedstock, and the generation of products. The methods of production and the advantages of the application of biogas, bioalcohol, and hydrogen in spark ignition engines, as well as biodiesel, Fischer–Tropsch fuel, and dimethyl ether in compression ignition engines, in terms of engine performance and emission are highlighted. The generation of biofuels from waste helps in waste minimization, proper waste disposal, and sanitation. The utilization of biofuels in ICEs improves engine performance and mitigates the emission of poisonous gases. There is a need for appropriate policy frameworks to promote commercial production and seamless deployment of these biofuels for transportation applications with a view to guaranteeing energy security.

Lubrication, emissions, and performance analyses of LPG and petrol in a motorbike engine: a comparative study

Abstract: The increased level of air pollution has caused the automobile industry to investigate alternate greener fuels to make vehicles more environmentally friendly. This study focuses on the perf...

Computer simulation of CH4–G222–H2 behaviour in a non-premixed combustion chamber

Abstract: This paper presents the numerical results of the study of a turbulent flame of methane enriched with hydrogen/air generated by a cylindrical burner. Computational Fluid Dynamics (CFD) code “FLUENT” and “Gambit” were used to perform the numerical simulation of the networking process. The Navier-Stokes equations, which estimate flow using a limited size method, have been resolved. The modeling of the disturbance/chemistry interaction has been used to associate the LES/PDF models with the state of system transfer equations. The calculations were analyzed for axial velocity, temperature, and carbon monoxide emissions. The results of the numerical calculations have been compared and checked for accuracy by returning to experimental data. The combustion behavior of CH4, G222 and H2 was employed by using the aforementioned parameters. The G222 is a mixture consists of 77% of methane and 23% of hydrogen. The obtained results confirm the fact of considering hydrogen as a clean non-polluting fuel compared to methane since it has no carbon monoxide emissions in combustion products. In addition, the velocity of hydrogen gas in the flame was significantly higher than the methane gas velocity.