水下自激脉冲射流喷嘴的吸气性能试验研究

运用自行研制的试验装置对水下不同结构参数的自激吸气脉冲射流喷嘴的吸气性能进行试验,研究了喷嘴的上下喷嘴直径、腔径和腔长等不同的组合配比对喷嘴吸气量的影响,以及喷嘴吸气量对喷嘴冲击性能的影响。结果表明:喷嘴吸气是提高水下自激脉冲射流冲击性能的有效途径,喷嘴的相对冲击力随着喷嘴吸气量的增加而提高;在较优的喷嘴结构参数配比范围内,喷嘴的吸气比率最大;最佳吸气比率的喷嘴面积比、相对腔长和相对腔径配比范围分别为3.5~4.0、8~9、11~12.5。

Inspiration performance of self- excited pulse jet nozzle in submerged condition

This study investig ate the self- excit ed inspiration pulse jet nozzle in submer ged co ndition by using the independently dev eloping test ing equipment . To analyze t he influence o f inspir ator y capacit y on inspir atio n perfo rmance, the str ucture parame2 t ers of nozzle cav ity leng th, lumen diameter , diameter of nozzle and cavit y volume to the no zzle under the influence of inspirato ry capacity wer e evaluated. The r esult s indicated t hat t he inspirat ion is an effective w ay to improv e dev ice performance. The r ela2 t ive impact of the no zzle w as enhanced w ith t he increasing of inspirat ion eff iciency ;Within t he scope o f the optimal r atio o f noz2 zle st ructur e par ameters, the larg est inspir ation r at io o f no zzle w as o btained; T he nozzle a rea ratio, r elative cav ity length and lu2 men diameter o f optimal inspir atio n efficiency r anges from 3. 5~ 4. 0, 8~ 9 and 11~ 12. 5, r espectiv ely.