Velocity field and diameter distribution of long-chain alcohol-aviation kerosene transverse jet

Abstract

The velocity field and diameter distribution of long-chain alcohol-aviation kerosene transverse jets were measured and analyzed. Aviation kerosene was chosen as the base fuel. During the transverse jet process, the droplet velocity direction transformed from the vertical direction to the horizontal direction, i.e., to the crossflow direction. The highest turbulence intensity appeared in the liquid–air interaction field. Both the resultant velocities on XZ and XY planes, Uxz and Uxy, and the component velocities along X, Y and Z coordinates, Ux, Uz, and Uy, increased at first and then decreased with the increment of long-chain alcohol volume proportion while the corresponding proportions are different between that of n-butanol and that of n-pentanol. The existence of vortex region was determined in the liquid–air interaction field and the near-field region in the downstream of the transverse jet. The particle size field analysis showed that the droplet size and shape factor and number density were mainly affected by Weg (Weber number of cross gas flow). The characteristics were different under different breakup modes. With the increase in the volume fraction of long-chain alcohol, the droplet size and Sf (shape factor) first increased and then decreased. The addition of long-chain alcohol also reduced the range of particle size with the largest number density. The maximum size of the droplets in the particle size field of n-pentanol-aviation kerosene was larger than that of n-butanol-aviation kerosene.