2018, Volume 5, Issue 4
Frontiers of Agricultural Science and Engineering >> 2018, Volume 5, Issue 4 doi: 10.15302/J-FASE-2017169
Droplet spectra and high-speed wind tunnel evaluation of air induction nozzles
1. Beijing Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
2. National Research Center of Intelligent Equipment for Agriculture, Beijing 100097, China
3. Beijing Key Laboratory of Intelligent Equipment Technology for Agriculture, Beijing 100097, China
Next Previous
Abstract
A series of air induction nozzles were tested in a high-speed wind tunnel. Droplet size spectra were measured for four air induction nozzles (IDK-120-01, IDK-120-02, IDK-120-03 and IDK-120-04) each at three spray pressures (0.3, 0.4 and 0.5 MPa) and seven different air velocities (121.7, 153.4, 185.5, 218.4, 253.5, 277.5 and 305.5 km·h ). The measurement distance (0.15, 0.25 and 0.35 m) from the nozzle orifice was found to be important for the atomization of the droplets. The response surface method was used to analyze the experimental data. The results indicated that v and v of the droplets decreased quasi-linearly with increased wind speed, while v was affected by the quadratic of wind speed. v , v and v of the droplets were all proportional to the orifice size, and were not markedly influenced by the spray pressure. The percentage of the spray volume consisting of droplets with a diameter below 100 mm (%<100 mm) was found to be quadratically related to wind speed, and was not markedly influenced by the spray pressure and orifice size. However, the effect of the orifice size on the %<200 mm could not be ignored.
Keywords
air induction nozzle ; wind tunnel ; aerial spray ; droplet size spectra
京公网安备 11010502051620号
