Effects of Fuel Flow inside the Nozzle on Spray Characteristics of Butanol/Diesel Blends
In order to build an accurate spray model for studying the characteristics of n-butanol and diesel blends. First, the calculation of gas-liquid two phase flow inside the nozzle was carried on, the birth and development of cavitation and the non-uniformity of the velocity field inside the nozzle were analysed. Then the spray model coupled flow inside the nozzle was established and verified. The spray simulation calculation of n-butanol and diesel blends was carried on by using the model, and compared the results with the results of flow inside the nozzle not coupled. The results show that the droplet speed, spray penetration and SMD of D100 and N40 is all bigger under the condition of without coupling flow inside the nozzle. The flow inside nozzle will affect the whole spray process and spray characteristics, which will ultimately affect the combustion and emission characteristics. So the spray model coupled flow inside the nozzle can provide accurate initial condition for spray calculation, which can reflects the fuel spray characteristics truly.
Danhong Cheng, Qunjie Xu and Weifeng Yao
J. Wu et al., "Effects of Fuel Flow inside the Nozzle on Spray Characteristics of Butanol/Diesel Blends", Advanced Materials Research, Vols. 1070-1072, pp. 1684-1689, 2015