超声空化对污垢沉积特性影响的数值研究

doi:10.11949/j.issn.0438-1157.20170615

化工学报 ›› 2017, Vol. 68 ›› Issue (S1): 184-190.DOI: 10.11949/j.issn.0438-1157.20170615

超声空化对污垢沉积特性影响的数值研究

张艾萍, 冯卓, 丁权, 徐志明

东北电力大学能源与动力工程学院, 吉林省吉林市 132012

收稿日期:2017-05-15 修回日期:2017-06-05 出版日期:2017-08-31 发布日期:2017-08-31
通讯作者: 张艾萍,dongdian510@163.com
基金资助:
国家自然科学基金项目（51476025）。

Simulation study on influential of ultrasonic cavitation on fouling deposition characteristic

ZHANG Aiping, FENG Zhuo, DING Quan, XU Zhiming

College of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China

Received:2017-05-15 Revised:2017-06-05 Online:2017-08-31 Published:2017-08-31
Supported by:
supported by the National Natural Science Foundation of China(51476025).

摘要/Abstract

摘要：

在超声波防垢过程中，超声波的传播以及空化效果会受到流体及超声波参数的影响，析晶污垢的沉积特性也会随之发生变化。对此，采用FLUENT数值模拟与实验参数相比对的方法研究了不同流体速度、超声波频率下超声空化对CaSO₄析晶污垢剥蚀的影响。结果表明：同频率条件下，增大流速超声空化对污垢的剥蚀效果减弱；同流速条件下，增大超声波频率超声空化对污垢的剥蚀效果减弱。将空化效应引起的剥蚀率代入污垢的沉积过程，得到超声波频率对污垢沉积特性的影响，随着超声波频率的增加，污垢净沉积率增加、污垢热阻变大。

关键词: 超声空化, 析晶污垢, 沉积特性, 数值模拟

Abstract:

In the process of ultrasonic antiscaling,the spread of ultrasonic and cavitation effect will be affected by the fluid and ultrasonic parameters,deposition character of crystallization fouling will also be changed. Thus,using the method of the FLUENT software numerical simulation compared with the experimental parameters,the effect of ultrasonic cavitation on CaSO₄ crystallization fouling removal is studied in the different fluid velocity and the ultrasonic frequencies. Results show that under the conditions of the same frequency,increasing velocity of fluid,the removal effect of ultrasonic cavitation on fouling is weakened. The removal rate caused by cavitation effect was brought into the fouling deposition process,and the effect of ultrasonic frequencies on the fouling character was obtained. With the increase of ultrasonic frequencies,fouling net deposition rate and fouling resistance increased.

Key words: ultrasonic cavitation, crystallization fouling, deposition character, numerical simulation

中图分类号:

TK124

张艾萍, 冯卓, 丁权, 徐志明. 超声空化对污垢沉积特性影响的数值研究[J]. 化工学报, 2017, 68(S1): 184-190.

ZHANG Aiping, FENG Zhuo, DING Quan, XU Zhiming. Simulation study on influential of ultrasonic cavitation on fouling deposition characteristic[J]. CIESC Journal, 2017, 68(S1): 184-190.

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超声空化对污垢沉积特性影响的数值研究

Simulation study on influential of ultrasonic cavitation on fouling deposition characteristic

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