无喷管助推器侵蚀燃烧模型对比研究

摘要

侵蚀燃烧对无喷管助推器的性能有着至关重要的影响。为了在无喷管助推器设计中准确预测其性能，在分析侵蚀燃烧机理的基础上，利用一维非定常变截面内弹道计算程序，采用几种典型的侵蚀燃烧模型对单燃速锥柱形装药和双燃速串装锥柱形装药发动机的特性进行分析。研究表明，文中推进剂在单燃速锥形装药发动机中表现出较弱的负侵蚀效应，采用无负侵蚀效应的侵蚀燃烧模型的预示结果好于带有负侵蚀效应的侵蚀模型，其中Lenoir-Robillard模型的预示精度最高。而双燃速串装发动机中由于燃气流速较小的范围更大，负侵蚀效应影响较大，只有使用具有负侵蚀效应的Greatrix模型才能得到较为准确的预示结果。%Erosive burning has significant influence on the performance of nozzleless booster .In or-der to accurately assess its performance in the design of nozzleless booster , based on the analysis of ero-sive burning mechanism , the characteristics of single burning rate grain nozzleless booster and series dual burning rate grain nozzleless booster are analyzed by using one-dimensional unsteady internal ballistic sim-ulation and several erosive burning models .The results show that the single burning rate grain nozzleless booster exhibits weak negative erosive burning , thus erosive burning models without negative erosion effect gets better prediction results than those with negative erosion effect , and Lenoir-Robillard model has the best prediction accuracy .As the low cross-flow velocity region of series dual burning rate grain nozzleless booster is much wider , the influence of negative erosion effect is greater , only using the Greatrix model with negative erosion effect can get more accurate prediction results .