Invertis Journals of Science & Technology

Rahul Agrawal ¹, B. N. Agrawal ², Vinod Sherawat ¹, K. P. Singh ²

Affiliations
1 NGFCET, Palwal (Haryana), IN
2 Delhi College of Technology and Management, Palwal (Haryana), IN

Abstract

Compression ignition engines have high thermodynamic efficiency therefore they have always been the first choice for heavy duty vehicles. However, future emission regulation poses a challenge for upcoming diesel engine combustion systems. Future emission regulations are becoming more restrictive, forcing engine designers towards lower exhaust emissions and better performance. The analysis is focused on direct injection Diesel engines, where the fuel-air mixing process plays a dominant role on engine performance. Only with a good understanding of these phenomena it will be possible to reduce the emission levels without impairing the engine performance and efficiency. all the four blends of hexane have higher value of ignition delay than the pure diesel for the entire range of temperature and also various pressures (10, 15, 20 and 25 bar). the variation of ignition delay for the Hexane blended diesel fuel with air temperature being varied from 583-663 K. The effect of percentage of n-hexane blends shows as increasing the percentage of n-hexane blends the ignition delay is also increased for pressure 10 to 25 bar. the variation of ignition delay of 20% and 30% DEE blends is much higher than the 10% and 20% DEE blends or 30% and 40% of DEE blends. In this case the percentages of blends of DEE is increases the ignition delay is decreased while the result is opposite in the n-hexane blends.

Keywords

n-Hexane, n-DEE, Blending, Ignition Delay.

Full Text

   

Parul Srivastava ¹, Shashank Dubey ¹, K. P. Singh ¹

Affiliations
1 Delhi College of Technology and Management, Palwal, Haryana, IN

Abstract

Metal matrix compositions (MMC) have become a leading materials and particles reinforced aluminum MMCs have received considerable attention due to their excellent mechanical properties like high hardness, high tensile strength etc. These materials difficult to machine because of high hardness and abrasive nature of reinforcing elements like alumina particles. In this study, homogenized (2%, 4%, and 6%) by weight of alumina aluminum metal matrix composite materials were fabricated and selected as workpiece for experimental investigations of tool wear, surface roughness and metal removal rate. The titanium nitride coated tungsten carbide tool and uncoated tungsten carbide tools were used at different cutting speeds (265, 400, 535 rpm), feed rate (0.29, 0.32, 0.35 mm/rev.), and depth of cut (1.0, 1.5, 2.0 mm). The microstructures and mechanical properties of produced composite specimens have been investigated. It has been observed that increase of reinforcement element produced better mechanical properties such as hardness and tensile strength. The turning experiments were planned by taguchi method. The obtained experimental data has been analyzed using signal to noise ratio and ANOVA. The main effects have been discussed and percentage contribution of various process parameters speed, feed, depth of cut and concentration effecting tool wear, surface roughness and metal removal rate have been determined. Empirical relations by regression have been developed to predict the tool wear, surface roughness and material removal rate as a function of considered process parameters.

Keywords

Composite Material, Tool Wearing and Reinforced.

Full Text