Effect of the head cavity on pressure oscillation suppression characteristics in large solid rocket motors  

作　　者：ZHANG Qiao WANG NingFei LI JunWei SU WanXing ZHANG Yan 

机构地区：[1]China Academy of Space Technology [2]School of Aerospace Engineering,Beijing Institute of Technology [3]Research and Development Center, China Academy of Launch Vehicle Technology [4]Qian Xue-sen Laboratory of Space Technology

出　　处：《Science China(Technological Sciences)》2015年第7期1250-1262,共13页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51076015)

摘　　要：In order to discover the effect of head cavity on resonance damping characteristics in solid rocket motors, large-eddy simulations with wall-adapting-local-eddy-viscosity subgrid scale turbulent model are implemented to study the oscillation flow field induced by vortex shedding based on the VKI （yon Karman Institute） experimental motor. Firstly, mesh sensitivity analysis and grid-independent analysis are carried out for the computer code validation. Then, the numerical method is further validated by comparing the calculated results and experimental data. Thirdly, the effects of head-end cavity on the pressure oscillation am-plitudes are studied in this paper. The results indicate that cavity volume, location and configuration have a cooperative ef- fect on the oscillation amplitude. It is proved that Rayleigh criterion can be used as a guiding principle for the design of reso- nance damping cavity. The change of the head-end cavity breaks the balance between the mass flux and acoustic energy. Therefore, the pressure oscillation characteristics change accordingly. It is concluded that a large mass flux added at the pres- sure antinode could attribute to significant amplitude. Meanwhile, the damping effect of the cavity is stronger when the dis- tance between cavity and pressure antinode becomes shorter. Finally, this method is applied to the modification of an engi- neering solid rocket motor. The static test of solid rocket motor reflects that the oscillations can be effectively suppressed by a head-end cavity.

关 键 词：solid rocket motor combustion instability large eddy simulation rayleigh criterion suppression method 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]