本文關(guān)鍵詞： 內(nèi)波 曝氣 分層水環(huán)境 能量　出處：《中國環(huán)境科學(xué)》2017年08期 　論文類型：期刊論文

【摘要】：針對目前國內(nèi)外缺乏對內(nèi)波和水流上涌對水體混合的相對強弱關(guān)系研究的現(xiàn)狀,采用近似計算的方法,提出了一種區(qū)分內(nèi)波和水流上涌對水體混合所做貢獻的新方法,定量計算了內(nèi)波和水流上涌對水體混合的貢獻率.在溫度梯度、躍溫層厚度、曝氣器出水口位置均相同的條件下,當(dāng)曝氣強度從62.5L/(h·m~3)增加到125L/(h·m~3)時,內(nèi)波對水體混合的貢獻從82%降到了50%;在溫度梯度、曝氣強度、曝氣器出水口位置均相同的條件下,隨著躍溫層厚度的增加,內(nèi)波對水體混合的貢獻從78.5%增加到83.5%.無消波裝置的水體混合的有效功率比有消波裝置的水體混合有效功率增加了40%以上,影響內(nèi)波混合最根本的原因是所形成內(nèi)波的A/T.實驗證明內(nèi)波只需要很少的能量就具有強大的混合作用,而曝氣產(chǎn)生的循環(huán)水流的混合作用卻截然相反,即內(nèi)波混合具有較高的能量利用率,利用內(nèi)波破壞水庫水體分層和改善水源水質(zhì)具有廣闊的應(yīng)用前景.
[Abstract]:In view of the lack of research on the relative strong or weak relationship between internal wave and upwelling water, a new method to distinguish the contribution of internal wave and upwelling to water body is proposed by using approximate calculation method. The contribution rate of internal wave and flow upwelling to water mixing was calculated quantitatively. When the aeration intensity increased from 62.5 L / h 路m ~ (3) to 125 L / h 路m ~ (3) when the temperature gradient, the thickness of temperature jump layer and the position of aerator outlet were the same, The contribution of internal wave to water mixing decreased from 82% to 50. Under the same temperature gradient, aeration intensity and the same position of aerator outlet, with the increase of temperature jump layer thickness, The contribution of internal waves to water mixing increased from 78.5% to 83.5. The effective power of water mixing without wave dissipation device increased by more than 40% compared with that of water body with wave dissipating device. The most fundamental reason for the internal wave mixing is the formation of the internal wave A / T. The experiment shows that the internal wave has a strong mixing effect with only a small amount of energy, but the mixing effect of the aerated circulating water flow is completely opposite. That is to say, internal wave mixing has high energy utilization ratio, and it has a broad application prospect to destroy the stratification of reservoir water and improve the water quality of source water by using internal wave.
【作者單位】： 西安建筑科技大學(xué)環(huán)境與市政工程學(xué)院;
【基金】：國家自然科學(xué)基金面上項目(51178379) 陜西省科技統(tǒng)籌創(chuàng)新工程計劃項目(2015KTCL-03-15) 教育部高等學(xué)校博士點專項科研基金(20106120120012) 人力資源和社會保障部留學(xué)人員科研擇優(yōu)資助項目(DB03153)
【分類號】：X524
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本文編號：1528178