Effect of aeration parameter on inner thrust of underwater two-phases ramjet

The underwater two-phases ramjet is one kind of new style jets which are based on the development of two phases bubbly flow throughout Laval nozzle. The working mechanism of ramjet was studied numerically by using CFD commercial software FLUENT 6.2. The steady flow, non-compressible air and non-exchanging heat were concerned. When the aeration speed is supersonic and keeping the velocity of ship and the aeration angle is steady, the inner thrust of the ramjet increases as the aeration speed increases. The inner thrust fluctuates in a wide range when the aeration speed increases to certain high level. When the pure air is aerated, the temperature of the air almost doesn't have effect on the inner thrust. When the gas aerated is composed of air and vapour, and the volume flux of the gas remains invariable, the increase of gas humidity will cause a drop of the inner thrust of the underwater two-phases ramjet.