Experimental research about the effects of attack angle on supercavitation of restrained model during axial accelerating

The effects of attack angle on supercavitation were studied experimentally during accelerating.The tests revealed:For small or zero attack angles,supercavitating can be forming behind the cavitator of prototype at cavitation numbers within the investigated range and with enough air injection.For reaching the same length of cavity,the larger the attack angle the more ventilation is needed.When the attack angle is larger than certain value (for our model it lager than about 2.5°),no supercavitation can be formed whatever the quantity of air injection increased.The trend of the influence of attack angle on supercavitating with ventilation is similar to that in steady case tested in water tunnels.