Abstract：To improve the jet effect in deep water, relying on self-developed test system, the operation parameters which affect device performance and erosion effect were experimentally investigated for certain structure parameters of self-excited inspiration pulse jet device. The relationship among working pressure, water depth and inspiration efficiency was determined by non-dimensional analysis to analyze the effect laws on device performance and erosion effect. The results show that the inspiration is an effective way to improve device performance and erosion effect. The inspiration efficiency of the device is affected by working pressure and water depth, and increased with the increasing of working pressure, but decreased with the increasing of water pressure. The value of relative impact of self-excited inspiration pulse jet in jet axial is larger than that of non-inspiration. In the water depth range from 10 to 60 m, with the increase of working pressure, the relative impact of the device is increased slowly in linear law, while the inspiration efficiency is increased in logarithmic law. When the working pressure is constant, the erosion surface area of self-excited inspiration pulse jet is larger than that of non-inspiration pulse jet, but the difference between them is reduced with the increase of water depth.
2014, Vol. 35 
