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In order to study the feasibility of the butanol as substitute fuel of diesel, the visualization experiment of spray characteristics on butanol diesel mixed fuel was carried out, using the software Fire of the company of AVL to establish a simulation model of n-butyl alcohol diesel spray and calculating the spray characteristics of N25 mixed fuel on the different turbulence intensity and different injection pressure, and contrast the result of experiment, and then analysis the velocity distribution and concentration distribution, spray penetration and Sauter Mean Diameter of the mixed fuel under the injection pressure of 120MPa. The results show that the fuel spray penetration decreases continuously and Sauter Mean Diameter increase gradually with the strength of the airflow; from the velocity distribution as a result of the action of air flow the spray of mixing fuel take place of deflection, the droplets falling speed in the spray center. From the concentration distribution it can be seen that the fuel droplet concentration distribution influenced by the turbulence intensity is very important. Keywords-Diesel; Butanol; Numerical simulation; Turbulence; Spray characteristics

Simulation Analysis Spray of the Butanol and Diesel Fuel Mixed with Injection Pressure and Air Flow Intensity