摘要
以侧压式进气道的附加阻力特性为研究对象,以流线跟踪得到的捕获流管为分析体,讨论进气道不同几何设计参数下喉道截面前捕获流管的阻力特性;以数值模拟为手段,分析了附加阻力作用表面的形状和变化特征,讨论了侧压式进气道流线偏转导致溢流的机理,给出了进气道几何参数变化对附加阻力的影响关系。研究发现,唇口前的溢流会产生"附加推力"而不是通常情况的附加阻力;附加推力随收缩比增加而增加,大小和流管作用的摩擦阻力处于同一水平。
The effect of different geometry parameter on the additive drag of sidewall-compression inlet is presented for the requirement of scaramjet drag characteristics. Captured streamtubes formed from stream-tracing are used to analyze additive drags. The streamsurface on which the additive drag acts is given by numerical investigation. Shape and characteristics of the stream-surface are investigated. The relationship between geometry parameters of inlets to additive drags is discussed. It is surprised that the additive drag becomes the additive thrust in sidewall-compression inlet. It is found that additive thrust increases with contraction ratio. The proportion of additive thrust is similar to that of the friction drag produced by the captured streamtube.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2007年第6期624-628,共5页
Journal of Propulsion Technology
基金
国家"八六三"计划(2005AA723020)
