导弹与航天运载技术
導彈與航天運載技術
도탄여항천운재기술
MISSILES AND SPACE VEHICLES
2013年
2期
41-45
,共5页
液体火箭发动机试验%仿真%热载%燃气温度%热流密度
液體火箭髮動機試驗%倣真%熱載%燃氣溫度%熱流密度
액체화전발동궤시험%방진%열재%연기온도%열류밀도
Liquid rocket engine test%Simulation%Heat load%Gas temperature%Heat flux
采用三维模型对发动机尾流流场进行数值模拟,获得氢氧火箭发动机水平试车和摇摆试车的尾流流场,以及在摇摆试车工况下,架空钢板的铺设高度、铺设宽度和起始铺设位置对地面热载的影响.计算中,采用氢氧单步燃烧反应模型考虑尾流燃气与空气的燃烧,湍流模型选用了标准 k-ε模型.仿真结果表明,合理铺设架空钢板,可以大幅减少试车过程中地面的热载,有效保护地面设施.
採用三維模型對髮動機尾流流場進行數值模擬,穫得氫氧火箭髮動機水平試車和搖襬試車的尾流流場,以及在搖襬試車工況下,架空鋼闆的鋪設高度、鋪設寬度和起始鋪設位置對地麵熱載的影響.計算中,採用氫氧單步燃燒反應模型攷慮尾流燃氣與空氣的燃燒,湍流模型選用瞭標準 k-ε模型.倣真結果錶明,閤理鋪設架空鋼闆,可以大幅減少試車過程中地麵的熱載,有效保護地麵設施.
채용삼유모형대발동궤미류류장진행수치모의,획득경양화전발동궤수평시차화요파시차적미류류장,이급재요파시차공황하,가공강판적포설고도、포설관도화기시포설위치대지면열재적영향.계산중,채용경양단보연소반응모형고필미류연기여공기적연소,단류모형선용료표준 k-ε모형.방진결과표명,합리포설가공강판,가이대폭감소시차과정중지면적열재,유효보호지면설시.
The wake’s flow fields of the hydrogen-oxygen rocket engine in the level tests and the swing tests were simulated numerically with the 3-D model. The influences of the aerial steel plate’s aerial height, aerial width and original paving position on the ground heat load were obtained. The single-step H-O reaction model was used for the reactions between the wake gas and air, and the standard k-εturbulence model was selected in the simulations. The numerical results showed that by paving the aerial steel plate right, the ground heat load can be reduced remarkably, and the ground facilities can be protected effectively.