• B.Malleswari
• Dr.K.Kalyani Radha

The main objective of this attempt is to enhance the air swirl to achieve the better performance characteristics and thermal efficiency of Direct Injection single cylinder diesel engine. To enhance the efficiency of an engine it is important to optimize the thermal efficiency, which is obtained by better air fuel swirling using spiral shaped bluff bodies along with bio diesel almond oil. Spiral shaped bluff bodies is one of the technique to increase the swirling motion on the piston crown to produce high turbulence prior to combustion within the cylinder. Hence the enhancement in the performance of direct injection diesel engine is carried with varying proportions of B10, B20 and B30 blends of biodiesel Almond oil at constant speed and varying loads at 180 bar injection pressure .

Direct injection diesel engines, spiral shaped bluff bodies, performance, almond oil.

"Performance characteristics of CI engines using diesel and blends of almond oil biodiesel with spiral shaped bluff bodies", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 12, page no.142-146, December-2017, Available :http://www.jetir.org/papers/JETIR1712029.pdf

"Performance characteristics of CI engines using diesel and blends of almond oil biodiesel with spiral shaped bluff bodies", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 12, page no. pp142-146, December-2017, Available at : http://www.jetir.org/papers/JETIR1712029.pdf