CAJ | 학술논문

采用商用 CFD 软件 FLUENT 6.3,建立了求解带自然空化的水、气、汽三相流场,用UDF来解算并控制导弹运动,实现了考虑自然空化和弹体多自由度运动响应的高速入水非定常流场数值计算。多相流模型采用Mixture模型,湍流模型采用标准k-ε模型,压力速度耦合方式和离散方法分别为SIMPLE和Standard,动网格更新方式采用 Layering 方式。内嵌的 UDF可以实时输出弹体受力和运动参数。采用流场-弹道耦合算法数值模拟了回转体外形导弹以20°入水角入水时的高速入水流场,分析并获得了推力对入水空泡和自然空泡的产生、变化发展过程以及弹体流体动力的影响规律。
채용상용 CFD 연건 FLUENT 6.3,건립료구해대자연공화적수、기、기삼상류장,용UDF래해산병공제도탄운동,실현료고필자연공화화탄체다자유도운동향응적고속입수비정상류장수치계산。다상류모형채용Mixture모형,단류모형채용표준k-ε모형,압력속도우합방식화리산방법분별위SIMPLE화Standard,동망격경신방식채용 Layering 방식。내감적 UDF가이실시수출탄체수력화운동삼수。채용류장-탄도우합산법수치모의료회전체외형도탄이20°입수각입수시적고속입수류장,분석병획득료추력대입수공포화자연공포적산생、변화발전과정이급탄체류체동력적영향규률。
By using the commercial CFD software Fluent 6.3,the three-phase (water,air,vapour)flow field with natural cavitation was established.The UDF was used to resolve and control the missile's move-ment.It realized the numerical calculation of unsteady high-speed water-entry flow field,which consider natural cavitation as well as the missile's multiple degree of free movement.The Mixture was adopted as the multi-phase model;and the stand k-εmodel was used as the turbulence model;and SIMPLE and Stand-ard were used as pressure-velocity coupling method and discretizaion method respectively.The Layering was adopted as the dynamic mesh updating method and the UDF can output the parameters real time.In this paper,the missile high-speed water-entry flow field with 20°angle was simulated and analyzed,and the influence of the thrusting force on cavity development and the missile hydrodynamics were gained.