CAJ | 학술논문

该文基于对钝锥头航行体的空化流动的实验观测,利用商业软件FLUENT[1]考核了分块网格模型对降低动网格方法误差影响、提高空化流计算精度的可行性和有效性.通过与实验的对比表明,采用分块网格模型能够使基于动网格方法的非稳态空化流计算很好的捕捉到空泡生长,回射,翻卷,脱落,溃灭这一过程,并获得较为准确的航行体的运动轨迹和所受的水动力.进而分析了流场涡结构与空泡演化的机理.
해문기우대둔추두항행체적공화류동적실험관측,이용상업연건FLUENT[1]고핵료분괴망격모형대강저동망격방법오차영향、제고공화류계산정도적가행성화유효성.통과여실험적대비표명,채용분괴망격모형능구사기우동망격방법적비은태공화류계산흔호적포착도공포생장,회사,번권,탈락,궤멸저일과정,병획득교위준학적항행체적운동궤적화소수적수동력.진이분석료류장와결구여공포연화적궤리.
Caviation flow over the vehicle with blunt cone was observed experimentally. The program package FLUENT was adopted to assess the feasibility and effectiveness of multi-block meshes in reducing the error caused by the dynamic mesh method and in improving the accuracy of computation. Then the capability of computing model based on the dynamic mesh method in simulating the inception, re-entrant jet, rolling, shedding and collapse of the attached cavities was assessed. The trajectory of the vehicle and hydrodynamic forces were calculated and was found to be in good agreement with experimental data. Finally the vortex structures and mechanism of cavity evolution were investigated.