振动与冲击
振動與遲擊
진동여충격
JOURNAL OF VIBRATION AND SHOCK
2015年
4期
48-52
,共5页
VOF 模型%Mixture 模型%水下航行体%带空泡出水
VOF 模型%Mixture 模型%水下航行體%帶空泡齣水
VOF 모형%Mixture 모형%수하항행체%대공포출수
VOF model%Mixture model%underwater vehicle%rising from water with cavity
基于VOF和Mixture两种均相流模型，并结合输运方程类空化模型、k－ε湍流模型和动网格技术，针对圆柱形航行体出水过程进行了数值模拟，获得了无空化、带空泡两种状态下航行体出水过程中的多相流物理景象和表面压力变化历程。根据计算结果分析了 VOF 模型、Mixture 模型在多相流界面捕捉、压力计算等方面的异同，并给出了两种模型的适用范围，在理论研究和工程应用上都具有重要意义。
基于VOF和Mixture兩種均相流模型，併結閤輸運方程類空化模型、k－ε湍流模型和動網格技術，針對圓柱形航行體齣水過程進行瞭數值模擬，穫得瞭無空化、帶空泡兩種狀態下航行體齣水過程中的多相流物理景象和錶麵壓力變化歷程。根據計算結果分析瞭 VOF 模型、Mixture 模型在多相流界麵捕捉、壓力計算等方麵的異同，併給齣瞭兩種模型的適用範圍，在理論研究和工程應用上都具有重要意義。
기우VOF화Mixture량충균상류모형，병결합수운방정류공화모형、k－ε단류모형화동망격기술，침대원주형항행체출수과정진행료수치모의，획득료무공화、대공포량충상태하항행체출수과정중적다상류물리경상화표면압력변화역정。근거계산결과분석료 VOF 모형、Mixture 모형재다상류계면포착、압력계산등방면적이동，병급출료량충모형적괄용범위，재이론연구화공정응용상도구유중요의의。
Here,the prediction capabilities of Mixture model and VOF one for the simulation of unsteady flows around a moving cylindrical vehicle were evaluated.In the simulation,the k-εturbulence model was used along with the transport equation-based cavitation model to simulate the vehicle rising from water process,the dynamic mesh technique was applied. Results were obtained under two states of non-cavitation and cavitation,respectively and the transient flow structures and time evolution of pressure distribution were revealed.According to the numerical results,the difference between the capability of VOF model and that of Mixture model was analyzed.Their applicable ranges are very important for theoretical study and engineering application.
