Presentation Title:Chinese Acoustic Rain Enhancement Experiments and Effect Analysis
Full Name:Zhanyu YAO
Affiliation / Institution:China Meteorological Administration Weather Modification Centre, Beijing 100081, China
Co-Author
Full Name:Zhen LIU
Affiliation / Institution:China Meteorological Administration Weather Modification Centre, Beijing 100081, China
Co-Author 2
Full Name:Jinzhao WANG
Affiliation / Institution:State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084; China
Co-Author 3
Full Name:Jie ZHAO
Affiliation / Institution:State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084; China
Co-Author 4
Full Name:Liang CHENG
Affiliation / Institution:State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084; China
Co-Author 5
Full Name:Tiejian LI
Affiliation / Institution:State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084; China
Co-Author 6
Full Name:Jun QIU
Affiliation / Institution:State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084; China
Co-Author 7
Full Name:Zequn ZHANG
Affiliation / Institution:China Meteorological Administration Weather Modification Centre, Beijing 100081, China
Co-Author 9
Full Name:Qi YAO
Affiliation / Institution:Qinghai Haiqing Qiangsheng Technology Co., Ltd, Xining, 810016, China
Co-Author 8
Full Name:Hengzhuang WANG
Affiliation / Institution:Qinghai Haiqing Qiangsheng Technology Co., Ltd, Xining, 810016, China
Abstract:As an effective particulate removal technique, acoustic agglomeration has potential application in the fields of weather modification. It is a cost-effective and environmentally friendly approach, without using catalysts such as silver iodide and having better controllability and target directivity. Acoustic waves are used to manipulate the motion of airborne particles through utilization of the energy transmission and momentum exchange between acoustic waves and discrete particles to intensify the vibration and collision processes of aerosols and droplets and then improve agglomeration efficiency. Acoustic coalescence can enhance existing precipitation or promote initiation of precipitation. As for this technology, more than 300 field experiments were performed in China since 2017 to reveal the influences of acoustic waves on cloud-precipitation processes. Some researchers conducted on the mechanism of acoustic rain enhancement on micro-scale, small-scale and prototype scale. The ground-based observations show that acoustic waves can significantly affect the rainfall distribution and microstructure of precipitation particles. To more comprehensively characterize acoustic intervention effects and obtain physical evidence of rain enhancement, more studies with detailed monitoring of the cloud-precipitation processes were performed, and some results with physical evidences have been demonstrated by effect analysis.