本文選題：超聲空化 + 析晶污垢��； 參考：《化工學報》2017年S1期

【摘要】：在超聲波防垢過程中,超聲波的傳播以及空化效果會受到流體及超聲波參數(shù)的影響,析晶污垢的沉積特性也會隨之發(fā)生變化。對此,采用FLUENT數(shù)值模擬與實驗參數(shù)相比對的方法研究了不同流體速度、超聲波頻率下超聲空化對CaSO_4析晶污垢剝蝕的影響。結果表明:同頻率條件下,增大流速超聲空化對污垢的剝蝕效果減弱;同流速條件下,增大超聲波頻率超聲空化對污垢的剝蝕效果減弱。將空化效應引起的剝蝕率代入污垢的沉積過程,得到超聲波頻率對污垢沉積特性的影響,隨著超聲波頻率的增加,污垢凈沉積率增加、污垢熱阻變大。
[Abstract]:In the process of ultrasonic scale prevention, ultrasonic wave propagation and cavitation effect will be affected by the fluid and ultrasonic parameters, and the deposition characteristics of crystalline fouling will also change. In this paper, the effect of ultrasonic cavitation on the denudation and denudation of CaSO4 was studied by using fluent numerical simulation method compared with experimental parameters. The results show that the denudation effect of ultrasonic cavitation on fouling is weakened at the same frequency, and the denudation effect is weakened by ultrasonic cavitation at the same velocity. The denudation rate caused by cavitation effect was substituted into the deposition process of fouling, and the influence of ultrasonic frequency on the deposition characteristics of fouling was obtained. With the increase of ultrasonic frequency, the net deposition rate of fouling increased and the thermal resistance of fouling increased.
【作者單位】： 東北電力大學能源與動力工程學院;
【基金】：國家自然科學基金項目(51476025)~~
【分類號】：TB559;TK172

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本文編號：2029030