Laboratory Investigation on Hydrodynamic Performance of an Innovative Aeration Device with a Wave-Driven Heaving Buoy

Zegao Yin, Yanxu Wang, Yong Liu, Chengyan Gao and Huan Zhang
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Zegao Yin: Engineering College, Ocean University of China, Qingdao, 266100, China
Yanxu Wang: Engineering College, Ocean University of China, Qingdao, 266100, China
Yong Liu: Engineering College, Ocean University of China, Qingdao, 266100, China
Chengyan Gao: China Communications Planning and Design Institute for Water Transportation LTD, NO.28 Guozijian St., Beijing 100007, China
Huan Zhang: Engineering College, Ocean University of China, Qingdao, 266100, China

Energies, 2018, vol. 11, issue 12, 1-15

Abstract: Coastal seawater quality is of significance for the environment, ecology and fisheries. In recent years, the hypoxia or anoxia problems of bottom seawater aggravated due mainly to the seawater stratification and eutrophication. This paper addresses an innovative aeration device with a wave-driven heaving buoy to enhance the dissolved oxygen concentration for bottom water. A series of physical experiments was conducted to investigate its hydrodynamic performance and air flow rate. The response amplitude of heaving components and the average value of air flow rate were examined with the related parameters, including incident wave height, incident wave steepness and aeration depth. It was found that with increasing incident wave height, the average heaving displacement and the average air flow rate increase respectively. With the increase of incident wave steepness, the relative value of average heaving displacement increases obviously for high wave period scenarios, it increases slightly for small wave period scenarios in comparison and the relative value of air flow rate increases evidently. With the increase of aeration depth, the average heaving displacement and the average air flow rate decrease respectively. With the increase of relative aeration depth, the relative value of average heaving displacement and the relative value of air flow rate decrease respectively. In addition, the dimensional analysis and the least squares methods were used to obtain the prediction formulas for the average heaving displacement and the average air flow rate, and they agreed well with the related experimental data.

Keywords: experiment; regular wave; heaving buoy; heaving displacement; air flow rate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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