Research on Effect of Nozzle Hole Distribution on Performance of Combustion System with Double ω CombustionChamber for Diesel Engine

doi:10.3969/j.issn.1000-1093.2015.01.005

Abstract

Abstract: A double ω-combustion chamber matched with a double-row nozzle hole combustion system is proposed to improve the spray spatial distribution and the mixture formation quality for diesel engines. The in-cylinder spray, mixture formation and combustion process of the new combustion system are simulated and investigated by using AVL FIRE software. The effects of nozzle hole distribution on the fuel/air equivalence ratio, temperature field and emission characteristics in the chamber are analyzed by changing the spatial distribution of nozzle hole. The results show that the mixture formation quality can be effectively improved by increasing the number of nozzle holes in the upper row, and moreover, the combustion process can be improved. With the spatial distribution of 5 nozzle holes in the upper row and 3 nozzle holes in the lower row, NOx and Soot emissions can be reduced.

Key words: power machinery engineering, diesel engine, double ω combustion chamber, double-row nozzle hole, numerical simulation

CLC Number:

TK421

WEI Sheng-li, WANG Fei-hu, CHEN Huan ， LENG Xian-yin. Research on Effect of Nozzle Hole Distribution on Performance of Combustion System with Double ω CombustionChamber for Diesel Engine[J]. Acta Armamentarii, 2015, 36(1): 33-39.

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