Drag reduction of a rapid vehicle in supercavitating flow

详细信息    查看全文

• 作者：D. Yang^a ; Y.L. Xiong^b ; ^c ; ^{xylcfd@hust.edu.cn} ; X.F. Guo^d
• 关键词：Drag reduction ; Numerical simulation ; Supercavitation ; Underwater vehicle ; Turbulent model ; Multiphase flow ; High-speed torpedo ; Supercavitating vehicle ; Computational fluid dynamics ; Cavitation number
• 刊名：International Journal of Naval Architecture and Ocean Engineering
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：9
• 期：1
• 页码：35-44
• 全文大小：1731 K
• 卷排序：9

文摘

Supercavitation is one of the most attractive technologies to achieve high speed for underwater vehicles. However, the multiphase flow with high-speed around the supercavitating vehicle (SCV) is difficult to simulate accurately. In this paper, we use modified the turbulent viscosity formula in the Standard K-Epsilon (SKE) turbulent model to simulate the supercavitating flow. The numerical results of flow over several typical cavitators are in agreement with the experimental data and theoretical prediction. In the last part, a flying SCV was studied by unsteady numerical simulation. The selected computation setup corresponds to an outdoor supercavitating experiment. Only very limited experimental data was recorded due to the difficulties under the circumstance of high-speed underwater condition. However, the numerical simulation recovers the whole scenario, the results are qualitatively reasonable by comparing to the experimental observations. The drag reduction capacity of supercavitation is evaluated by comparing with a moving vehicle launching at the same speed but without supercavitation. The results show that the supercavitation reduces the drag of the vehicle dramatically.