Further Study on Aerators with Sudden Lateral Enlargement and Bottom Drop

ZHOU Chi; LI Jing

doi:10.11988/ckyyb.20140255

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Journal of Changjiang River Scientific Research Institute ›› 2015, Vol. 32 ›› Issue (9) : 76-79,89. DOI: 10.11988/ckyyb.20140255

HYDRAULICS

Further Study on Aerators with Sudden Lateral Enlargement and Bottom Drop

ZHOU Chi, LI Jing

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Abstract

Cavitation and cavitation erosion under high flow velocity and gate seal under high water head are two problems that high-head outlet structure is facing with in operation. To further understand the hydraulic and cavitation characteristics of aerators with sudden lateral enlargement and bottom drop, we took a hydraulic project’s flood discharge tunnel with orifices as research object and through a local hydraulic model with scale of 1:20, we analyzed the physical hydraulic parameters (wind velocity of ventilation hole, flow pattern, pressure, air concentration) of the middle lock chamber’s ventilation system and the aerator with sudden lateral enlargement and bottom drop. Furthermore we compared the test results with prototype observation results. Results showed that this project had good aeration effect. The test values of wind speed change with gate opening in ventilation pipe, flow aeration concentration, pressure and its fluctuation were consistent with prototype result. Prototype observation and practical operation both validate that the sudden enlargement layout meets practical demand, so it is safe and feasible. It is also an effective measure to solve gate seal and air entrainment to alleviate cavitation under high water head.

Key words

sudden lateral enlargement and bottom drop / cavitation and cavitation erosion / gate seal / aerator / pressure / air concentration

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ZHOU Chi, LI Jing. Further Study on Aerators with Sudden Lateral Enlargement and Bottom Drop[J]. Journal of Changjiang River Scientific Research Institute. 2015, 32(9): 76-79,89 https://doi.org/10.11988/ckyyb.20140255

References

[1] 朱荣林. 突扩跌坎式通气设施的若干问题[C]∥水利水电科学研究院科学研究论文集第21集. 北京:水利电力出版社,1986: 53-58. (ZHU Rong-lin. Some Problems of Sudden Enlarge and Sudden Drop Ventilating Device[C]∥Scientific Research Proceedings of China Institute of Water Resources and Hydropower Research (The 21st Volume). Beijing: Water Resources and Electric Power Press, 1986: 53-58. (in Chinese))
[2] 周赤,韩继斌,肖兴斌. 弧门突扩跌坎掺气减蚀应注意的问题[J].水电工程研究,1997,(3):29-36. (ZHOU Chi, HAN Ji-bin, XIAO Xing-bin. Problems of Arch Sudden Enlarge and Sudden Drop Air Entrainment to Alleviate Cavitations[J]. Research of Hydropower Engineering, 1997, (3): 29-36. (in Chinese))
[3] 潘水波,邵瑛瑛.突扩跌坎通气减蚀设施的水力估算方法[J].水利学报,1986,(8):12-19. (PAN Shui-bo, SHAO Ying-ying. Hydraulic Estimation Method of Sudden Enlarge and Sudden Drop Ventilation and Cavitation Alleviation Device[J]. Journal of Hydraulic Engineering, 1986, (8): 12-19. (in Chinese))
[4] 胡去劣.突扩门槽水力学试验研究[J].水利水运科学研究,1990,(1):71-79. (HU Qu-lie. Hydraulic Experimental Research of Sudden Enlarge Gate Slot[J]. Journal of Nanjing Hydraulic Scientific Research, 1990, (1): 71-79. (in Chinese))
[5] 杨顺玉.弧门后突扩、跌坎通气设施的空化特性[C]∥泄水工程与高速水流.长春:吉林人民出版社,1992:183-187. (YANG Shun-yu. Cavitaion Characteristics of Sudden Enlarge and Sudden Drop Ventilating Device Behind Arch Gate[C]∥Discharging Engineering and High Velocity Flow. Changchun: Jilin People’s Publication, 1992: 183-187. (in Chinese))
[6] 万宝珍,林楠.掺气减蚀的设计[C]∥泄水工程与高速水流.长春:吉林人民出版社,1997:156-159. (WAN Bao-zhen, LIN Nan. Design of Aeration and Erosion Alleviation[C]∥Discharging Engineering and High Velocity Flow. Changchun: Jilin People Publication, 1997: 156-159. (in Chinese))
[7] 周赤,何勇,廖仁强. 三峡工程泄洪深孔突扩跌坎式掺气的试验研究[J].raybet体育在线院报,1997,14(2):2-6. (ZHOU Chi, HE Yong, LIAO Ren-qiang. Experimental Study of the Flood-Release Deep Outlets of Three Gorges Project[J]. Journal of Yangtze River Scientific Research Institute, 1997,14(2):2-6.(in Chinese))
[8] 黄国兵,廖仁强,陈端. 水布垭水利枢纽放空洞水力学试验研究[J].raybet体育在线院报,2004,21(4):4-6. (HUANG Guo-bing, LIAO Ren-qiang, CHEN Duan. Hydraulic Test Study on Emptying Tunnel of Shuibuya Project[J]. Journal of Yangtze River Scientific Research Institute,2004,21(4):4-6.(in Chinese))
[9] 金峰,周赤,廖仁强,等. 突扩跌坎型门座的水力学问题研究[J].人民长江,2001,32(11):37-39. (JIN Feng, ZHOU Chi, LIAO Ren-qiang,et al. Study of Hydraulic Problem of Sudden Enlarge and Sudden Drop Gate Seat[J]. Yangtze River, 2001, 32(11): 37-39.(in Chinese))
[10]周赤,何勇,三峡工程泄洪深孔体型及掺气设施研究[J].水力发电学报,2010,39(2): 31-35. (ZHOU Chi, HE Yong. Overview on Hydraulic Design of the Flood-Release Deep Outlets of Three Gorges Project[J]. Journal of Hydroelectric Engineering.,2010,39(2):31-35.(in Chinese))
[11]梅燕.高水头弧形闸门止水型式研究[J].水利电力机械,2006,28(1):12-15. (MEI Yan. Study on High Water Head Arced Gate Water Seal Type[J]. Hydropower Electricity and Machine, 2006, 28(1): 12-15.(in Chinese))
[12]金泰来,刘之平,李勇.深孔出口突扩弧门止水的实践与研究[J].中国三峡建设,2000, (7):43-46. (JIN Tai-lai, LIU Zhi-ping, LI Yong. Practice and Research of Deep Orifice Outlet Sudden Enlarge Arced Gate Water Seal[J]. China Three Gorges Construction, 2000, (7): 43-46.(in Chinese))
[13]汪志龙.天生桥一级水电站放空洞高压弧门设计与运行[J].云南水力发电, 2001,17(2):88-90. (WANG Zhi-long. Design and Operation of Emptying Tunnel High Pressure Arced Gate of Tianshengqiao Junior Hydropower Station[J].Yunnan Hydropower Generation, 2001,17(2): 88-90. (in Chinese))
[14]廖仁强,向光红,汪鲁明.水布垭高水头放空洞设计技术创新与工程实践 [J].人民长江,2008,39(19):1-3. (LIAO Ren-qiang, XIANG Guang-hong, WANG Lu-ming. Design Technology Innovations and Engineering Practice of High-head Emptying Tunnel of Shuibuya Hydroproject[J].Yangtze River, 2008, 39(19): 1-3.(in Chinese))
[15]王才欢.小浪底水利枢纽3^#孔板泄洪洞中闸室水工模型试验研究报告[R].武汉:raybet体育在线 ,2000. (WANG Cai-huan. Report of Hydraulic Model Test on the Middle Chamber of Discharge Tunnel 3# with Orifices in Xiaolangdi Hydropower Project[R]. Wuhan: Yangtze River Scientific Research Institute, 2000.(in Chinese))
[16]李振连,刘继广,吴一红,等.小浪底2号孔板洞中闸室突扩突跌式掺气设施原型观测研究[J].水利水电技术,2006,3(8):16-19. (LI Zhen-lian, LIU Ji-guang, WU Yi-hong, et al. Prototype Observation on Aerator with Sudden Enlargement and Sudden Drop Device for Xiaolangdi Water Control Project[J]. Water Resources and Hydropower Engineering, 2006, 3(8): 16-19.(in Chinese))