【摘要】：半開(kāi)式注氣海水提升系統(tǒng)是制造人工涌升流的重要方式之一。曝氣頭的離壁距離是影響半開(kāi)式注氣海水提升系統(tǒng)的重要因素。為此,專(zhuān)門(mén)設(shè)計(jì)由曝氣頭、直線(xiàn)導(dǎo)軌、繩索、活節(jié)螺絲、標(biāo)尺和重物組成的試驗(yàn)系統(tǒng),用以研究不同孔徑的曝氣頭在不同氣體流量、不同離壁距離時(shí),不同高度下的涌升流流量。結(jié)果表明,氣泡直徑增大時(shí)產(chǎn)生的涌升流流量卻有所減小;雖然曝氣頭的離壁距離與氣泡直徑的變化幾乎沒(méi)有影響,但還是會(huì)影響涌升流流量,因?yàn)楦淖兤貧忸^的離壁距離還影響了涌升流半徑縱向變化率;而對(duì)氣泡驅(qū)動(dòng)的涌升流流量影響最大的則是曝氣頭高度,在距曝氣頭高度為0.8~1.6 m的水域中,同一高度上涌升流流量隨著離壁距離的減小而減小,并且涌升流流量的變化程度隨著高度的降低也在逐漸變小,當(dāng)距曝氣頭高度小于0.8 m時(shí)離壁距離對(duì)涌升流流量幾乎沒(méi)有影響,而當(dāng)距曝氣頭高度超過(guò)1.6 m時(shí)離壁距離影響很大。綜合考慮曝氣頭高度和離壁距離的影響,對(duì)理論公式進(jìn)行適當(dāng)修正后發(fā)現(xiàn),與試驗(yàn)結(jié)果符合得很好,為人工涌升流系統(tǒng)的設(shè)計(jì)提供參考。
[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.
【作者單位】： 浙江理工大學(xué)機(jī)械與自動(dòng)控制學(xué)院;杭州電子科技大學(xué)機(jī)械工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51376055,51220195001,41076055) 浙江省科技廳國(guó)際合作(2012C34G2040006)資助項(xiàng)目
【分類(lèi)號(hào)】：P742
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本文編號(hào)：2227653