壁面对半开式注气海水提升系统涌升流流量的影响研究
发布时间：2018-09-07 07:49
【摘要】：半开式注气海水提升系统是制造人工涌升流的重要方式之一。曝气头的离壁距离是影响半开式注气海水提升系统的重要因素。为此,专门设计由曝气头、直线导轨、绳索、活节螺丝、标尺和重物组成的试验系统,用以研究不同孔径的曝气头在不同气体流量、不同离壁距离时,不同高度下的涌升流流量。结果表明,气泡直径增大时产生的涌升流流量却有所减小;虽然曝气头的离壁距离与气泡直径的变化几乎没有影响,但还是会影响涌升流流量,因为改变曝气头的离壁距离还影响了涌升流半径纵向变化率;而对气泡驱动的涌升流流量影响最大的则是曝气头高度,在距曝气头高度为0.8~1.6 m的水域中,同一高度上涌升流流量随着离壁距离的减小而减小,并且涌升流流量的变化程度随着高度的降低也在逐渐变小,当距曝气头高度小于0.8 m时离壁距离对涌升流流量几乎没有影响,而当距曝气头高度超过1.6 m时离壁距离影响很大。综合考虑曝气头高度和离壁距离的影响,对理论公式进行适当修正后发现,与试验结果符合得很好,为人工涌升流系统的设计提供参考。
[Abstract]:Semi-open air injection seawater lifting system is one of the most important ways to produce artificial surge current. The distance from the aeration head to the wall is an important factor affecting the semi-open air injection seawater lifting system. For this purpose, a special test system composed of aeration head, linear guide rail, rope, nodal screw, scale and weight is designed to study the aeration head with different aperture at different gas flow rate and different distance from the wall. Upwelling flow at different heights. The results show that the upwelling flow rate decreases with the increase of bubble diameter, although the distance from the air head to the wall and the bubble diameter change little, but it still affects the upwelling flow rate. Because changing the distance from the wall of the aerator also affects the vertical change rate of the rising radius of the aerator, and the height of the aerator is the most important one for the bubble-driven upwelling flow, in the water area from which the height of the aerator is 0.8 ~ 1.6 m, The upwelling flow at the same height decreases with the decrease of the distance from the wall, and the variation degree of the upwelling flow decreases with the decrease of the height. When the height of the aerator is less than 0.8 m, the distance from the wall has little effect on the upwelling flow, but the distance from the wall is very great when the height of the aerator is more than 1.6 m. Considering the influence of aeration head height and distance from the wall, it is found that the theoretical formula is in good agreement with the experimental results, which provides a reference for the design of artificial upwelling system.
【作者单位】： 浙江理工大学机械与自动控制学院;杭州电子科技大学机械工程学院;
【基金】：国家自然科学基金(51376055,51220195001,41076055) 浙江省科技厅国际合作(2012C34G2040006)资助项目
【分类号】：P742
，
本文编号：2227653
[Abstract]:Semi-open air injection seawater lifting system is one of the most important ways to produce artificial surge current. The distance from the aeration head to the wall is an important factor affecting the semi-open air injection seawater lifting system. For this purpose, a special test system composed of aeration head, linear guide rail, rope, nodal screw, scale and weight is designed to study the aeration head with different aperture at different gas flow rate and different distance from the wall. Upwelling flow at different heights. The results show that the upwelling flow rate decreases with the increase of bubble diameter, although the distance from the air head to the wall and the bubble diameter change little, but it still affects the upwelling flow rate. Because changing the distance from the wall of the aerator also affects the vertical change rate of the rising radius of the aerator, and the height of the aerator is the most important one for the bubble-driven upwelling flow, in the water area from which the height of the aerator is 0.8 ~ 1.6 m, The upwelling flow at the same height decreases with the decrease of the distance from the wall, and the variation degree of the upwelling flow decreases with the decrease of the height. When the height of the aerator is less than 0.8 m, the distance from the wall has little effect on the upwelling flow, but the distance from the wall is very great when the height of the aerator is more than 1.6 m. Considering the influence of aeration head height and distance from the wall, it is found that the theoretical formula is in good agreement with the experimental results, which provides a reference for the design of artificial upwelling system.
【作者单位】： 浙江理工大学机械与自动控制学院;杭州电子科技大学机械工程学院;
【基金】：国家自然科学基金(51376055,51220195001,41076055) 浙江省科技厅国际合作(2012C34G2040006)资助项目
【分类号】：P742
，
本文编号：2227653
本文链接：https://www.wllwen.com/kejilunwen/haiyang/2227653.html
