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Citation:
　Chuang Huang,Jianjun Dang,Kai Luo,et al.Influence of Ramjets’ Water Inflow on Supercavity Shape and Cavitator Drag Characteristics[J].Journal of Marine Science and Application,2017,(2):166-172.[doi:10.1007/s11804-017-1409-7]
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Influence of Ramjets’ Water Inflow on Supercavity Shape and Cavitator Drag Characteristics

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Title:
Influence of Ramjets’ Water Inflow on Supercavity Shape and Cavitator Drag Characteristics
Author(s):
Chuang Huang1;  Jianjun Dang1;  Kai Luo1;  Daijin Li1;  Zhiqiang Wang2
Affilations:
Author(s):
Chuang Huang1;  Jianjun Dang1;  Kai Luo1;  Daijin Li1;  Zhiqiang Wang2
1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China;
2. Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an 710119, China
Keywords:
ramjet; water inflow; disk cavitator; supercavitaty shape; drag characteristic; high speed supercavitating vehicles
分类号:
-
DOI:
10.1007/s11804-017-1409-7
Abstract:
Water ramjets using outer water as an oxidizer have been demonstrated as a potential propulsion mode for underwater High Speed Supercavitating Vehicles (HSSVs) because of their higher energy density, power density, and specific impulse, but water flux changes the shapes of supercavity. To uncover the cavitator drag characteristics and the supercavity shape of HSSVs with water inflow for ramjets, supercavitation flows around a disk cavitator with inlet hole are studied using the homogenous model. By changing the water inflow in the range of 0-10?L/s through cavitators having different water inlet areas, a series of numerical simulations of supercavitation flows was performed. The water inflow flux of ramjets significantly influences the drag features of disk cavitators and the supercavity shape, but it has little influence on the slender ratio of supercavitaty. Furthermore, as the water inlet area increases, the drag coefficient of the cavitators’ front face decreases, but this increase does not influence the diameter of the supercavity’s maximum cross section and the drag coefficient of the entire cavitator significantly. In addition, with increasing water flux of the ramjet, both the drag coefficient of cavitators and the maximum diameter of supercavities decrease stably. This research will be helpful for layout optimization and supercavitaty scheme design of HSSVs with water inflow for ramjets.

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Memo

Memo:
Received date:2016-4-10;Accepted date:2017-3-14。
Foundation item:Supported by the National Natural Science Foundation of China under Grant Nos. 51579209, 51409215 and 51679202
Corresponding author:Kai Luo, Email: luokai72@163.com
Last Update: 2017-05-09