Flow field and spray of a high shear air-blast nozzleChinese Full Text
LI Zhen-xiang;GUO Zhi-hui;CHE Jun-long;FU Yu;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,School of Energy and Power Engineering,Beijing University of Aeronautics and Astronautics;
Abstract: The flow field and spray characteristics of a high shear air-blast nozzle were investigated numerically and experimentally.Particle dynamics analyzer(PDA)was employed to experimentally study on the velocity field and spray field of the high shear air-blast nozzle under different air-liquid ratios.And through numerical calculation of the flow field of the nozzle,the calculated results agreed with the experimental data.The results show that the design of high shear air-blast nozzle is reasonable.Two swirl air flows could finish strong momentum exchange inside the nozzle,and fuel is highly sheared.The high shear air-blast nozzle can achieve good atomization under wide regulation ratios.When the air-liquid ratio is of 10 times,the Sauter mean diameter distribution of spray is between 20-60μm.With the increase of air-liquid ratio,line averaging Sauter mean diameter decreases.The calculation model of Sauter mean diameter is derived for the nozzle.The results can provide references for high shear air-blast nozzle design.
Keywords:
high shear air-blast nozzle; PDA; flow field; spray characteristics; wide regulation ratio;
- DOI:
10.13224/j.cnki.jasp.2014.11.022
- Series:
- Subject:
- Classification Code:
V231
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