Development Of A High-speed Towing Tank And Experimental Study Of Hydrodynamics And Cavitation Of Different Geometric Models

Hydromechanics characteristic research of a high speed body in the water takes animportant role in military research of missile in the various countries. But because of some limitthis research develops not very well in our country, especially in the field of the cavityphenomenon of a high speed body in the water, the theoretical basis is imperfect. In order tobetter improve our cavitation experiment study ability, it needs to pay attention to this subject allscholars.This thesis is supported by the Natural Science Foundation of Zhejiang Province under aPriority Project (No. Z1110123). In this paper a new underwater object of high speed movementin recent two d drag the sink was designed successfully, combined with a visual means we canobserve the flow field around the objects, it can also be used for the study of high-speedunderwater during water entry and water exit.The result shows that high speed motion of thecircular cross model is more stable than the spuare cross model. The pointed head type has goodindependence on the surrounding fluid compared with others, and It’s the most conducive to thestability of supercaviting bodies voyage. At the same speed, the model of ircular cross sectionhas minimal effect on fluid in the length direction,90°-angle model has the minimal effect onfluid. Around the head of the model appears floe fluid, and its size increases along with theincrease of the speed of the model, but there is cavitation phenomenon observed, in this paper,this has also some objective analysis and the theory analysis.