The work aims to explore high-speed lachrymatory jet trajectory and the effect of external wind environment on the target performance of lachrymator.A high-speed jet transient collection and wind resistance test platform was built to sys-tematically study the jet's dynamic characteristics and wind-resistant performance,and compare it with the current spray with lachrymator.Results showed that the high-speed lachrymatory jet presented regular column shape at the beginning with an ini-tial diameter of 5.5 mm and an initial speed of 138.9 m/s;At 1 m,the jet had an obvious characteristic of clustering in the center with cavitation occurred around it,and the speed decreased to 88.3 m/s;At 3 m,the jet trajectory presented a divergent fila-mentous pattern,and the speed decreased to 42.9 m/s.While the speeds of the general lachrymatory jet were 7.9 m/s,20.7 m/s and 7.5 m/s at 0.2 m,1 m and 3 m respectively.The jet gradually dispersed into small granular liquid beads during the advancing process,and the overall trajectory moved downward at 3 m.In terms of wind-resistant performance,a 600 mm×900 mm target simulating the upper torso of the human body(aiming at the face)was used.Under the actions of level 0～4 side winds,the target rates of the high-speed lachrymatory jet were 85.2%to 57.4%,the center lateral deviation was less than 10 cm;While for the general lachrymatory jet,the target rates were 78.8%to 4.2%and the center lateral deviation was more than 20 cm.The high-speed lachrymatory jet trajectory has better characteristics of clustering and directionality compared with the general la-chrymatory jet,meanwhile the speeds are higher overall.On the wind-resistant performance,the high-speed lachrymatory jet has obvious advantages also.In addition,it indicates that the dynamic characteristics of jet trajectory play a key role in wind stability.
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万方数据
