【摘要】 为了研究喷嘴结构对非稳态射流推进性能的影响，搭建了射流试验台架，以单个固定喷嘴生成非稳态射流，考察了锥型、锥直型和Wyszynski型3种喷嘴内腔结构以及30°，60°和90°3种喷嘴唇边结构。结果表明：锥型喷嘴的非稳态射流平均推力比锥直型喷嘴提升了1.8%，比Wyszynski型喷嘴提升了2.0%;30°喷嘴唇边的非稳态射流平均推力比60°唇边提升了2.3%，比90°唇边提升了7.7%；试验推力比值都大于2，证实了非稳态射流存在推力增强效应，锥型喷嘴推力比值比锥直型提升了0.3%，比Wyszynski型提升了4.0%,30°喷嘴唇边的推力比值比60°唇边提升了6.0%，比90°唇边提升了8.6%，研究结果可为喷嘴结构设计提供理论依据。更多还原

【Abstract】 In order to study the influence of nozzle configuration on unsteady jet propulsion performance,an experimental bench for jets was built,the unsteady jet was generated by a single fixed nozzle,the cone type,straight cone type and Wyszynski type of nozzle inner cavity profile and 30°,60° and 90° nozzle lips were investigated. The results indicate that the average thrust of the unsteady jet for the cone type nozzle is 1.8% larger than the straight cone type nozzle and 2.0% larger than the Wyszynski type nozzle;the average thrust of the unsteady jet for 30° lip is 2.3% larger than the 60° lip and 7.7% larger than the 90° lip;the experimental thrust ratio is greater than 2,which proves the thrust enhancement effect of unsteady jet,the thrust ratio of the cone type nozzle is 0.3% larger than the straight cone type nozzle and 4.0% larger than the Wyszynski type nozzle,the thrust ratio of the 30° lip is 6.0% larger than the 60° lip and 8.6% larger than the 90° lip. The research results can provide a theoretical basis for the design of nozzle structures.更多还原