摘要
选取NACA66水翼作为对象来研究绕弹性水翼非定常流动的水弹性响应特性,采用混合耦合算法针对Re=75 000的不稳定的片状/云状空化(σ=1.4)流动进行了数值计算,并与实验结果进行了对比.数值计算结果与实验结果基本吻合,较好地模拟了非定常空化初生、发展、断裂和脱落的周期性过程.结果显示,在片/云状空化下,弹性水翼的空化脱落频率与相应的实验结果基本一致;扭转振动使空化不稳定程度加剧,形成了波动的不稳定泡状形态.
The hydro-elastic transient response of a NACA66 hydrofoil was studied in the turbulent flow. By using a hybrid coupling algorithm, the numerical analysis of the unsteady sheet/cloud cavitating flow field was carried out in the Reynolds numbers of 750000. The periodic process of the unsteady cavitating flow was simulated. The results showed that under the condition of the unsteady sheet/cloud cavitating flow, the frequency of cavitation shedding agreed well with the experiment results. Unstable bubbles were formed and the instability of cavitation was aggravated due to the twisting and bending deformation.
出处
《车辆与动力技术》
2014年第4期45-49,共5页
Vehicle & Power Technology
基金
国家自然科学基金青年科学基金项目(51306020)
关键词
弹性水翼
混合耦合算法
动力响应
Flexible Hydrofoil
Hybrid coupling algorithm
Dynamical Response
