【作者】 李旭；

【导师】 裴毅；

【作者基本信息】 湖南农业大学 ， 农业水土工程， 2016， 硕士

【摘要】 在众多增氧方式中,在不同增氧方式增氧效率不高的背景下,我们将文透里负压吸气原理和流体动力式超声波发声原理进行组合设计,形成了流体动力式超声波增氧装置。本文主要围绕流体动力式超声波增氧装置的簧片哨和喷嘴,在不同尺寸的配合下,研究出其不同的增氧效率,选出水体增氧最佳的配合尺寸。同时,研究了进气量对水体中的溶氧量的影响以及经过增氧之后的水随着时间变化趋势。得到以下结果：(1)进行装置尺寸优化。本试验制作了三个不同簧片长度、厚度和喷嘴高度进行了大量组合试验。最后得出的结果是：簧片长度为43 mm、簧片厚度为1.0mm、喷嘴高度为9 mm时候,在当前水温度下,其溶氧量能够达到饱和甚至超饱和状态。(2)装置进气量对水体的增氧效果。进气量在2L/min时,出现了溶氧量急剧增加的情况,此时水体对氧气吸收效果最佳。当进气量从2-10 L/min左右时,溶氧量增加速率变小,增氧效果缓慢。在10 L/min之后,溶氧量基本上不增加,形成稳定值不变。(3)试验水随着时间的变化趋势。该试验在增氧后的溶氧量在2h内溶氧量还会继续增加,2h达到最大值；2h后,溶氧量会急剧下降；6h后,溶氧量下降速率变缓；到20 h的时候,试验水溶氧量趋于稳定不变状态。更多还原

【Abstract】 In many ways aerobics, aerobics in different ways aeration efficiency is not high background, we will Venturi vacuum suction principle and fluid power ultrasonic sound design principles combined to form a hydrodynamic ultrasonic oxygen apparatus. This paper, focusing reed whistle and hydrodynamic ultrasonic nozzle oxygen apparatus, in different sizes fit to work out their different aeration efficiency of water aerobics to elect the best fit size. At the same time, the effects of the intake air amount of dissolved oxygen in the water and oxygen after passing through the water with time trends. Following results were obtained:(1) optimize the size of the device. The experiment produced three different reed length, thickness and height of the nozzle combination of a lot of tests. Finally, the results obtained are:reed length of 43mm, reed thickness 1.0mm,9mm height of the nozzle when the current water temperature, dissolved oxygen which can be saturated or supersaturated.(2) means the intake air quantity of water aerobic effect. Intake air at 2L/min, there has been a sharp increase in the amount of dissolved oxygen, the oxygen absorption of water at this time is best. When the intake air amount from about 2-10L/min, the rate of increase in the amount of dissolved oxygen becomes smaller, the effect of oxygen slowly. After lOL/min, substantially increasing the amount of dissolved oxygen, to form a stable constant value.(3) Test the water with the trend of time. The trial in the amount of oxygen dissolved oxygen after the oxygen content will continue to increase in 2 hours,2 hours maximum; after 2 hours, dissolved oxygen will decline sharply; after 6 hours, the amount of dissolved oxygen in the rate of decline smaller; last 20 hours, when the amount of dissolved oxygen tends to remain stable state.更多还原