Dr. Yan Haijun, Professor
Prof.Yan Haijun (born in May 1974 in Zhejiang Province, China) is a Professor in College of Water Resources & Civil Engineering at China Agricultural University (CAU). He is the director of the Division of General Research Project, Office of Research and Development, CAU, and the vice chief of Engineering Center of Ministry of Education for Agricultural Water-Saving and Water Resources.
He received the B.S., M.S., and Ph.D. degree from China Agricultural University in 1996, 1999, and 2005. He participated in an international course on “Advanced irrigation system for intensive crop production” organized by Ministry of Foreign Affairs (MASHAV) and Ministry of Agriculture (CINADCO), State of Israel, from May to June in 2005. He conducted his post-doctoral research in Graduate School of Science and Technology at Niigata University, Japan, from October 2006 to March 2008. He served as the deputy secretary of Party Committee for College of Water Resources & Civil Engineering from 2008 to 2010. He started his teaching career at CAU since 1999 and became a Professor in January 2012.
He is the member of Drainage and Irrigation Machinery Division of Chinese Society for Agricultural Machinery, the member of Subcommittee on Drainage and Irrigation equipment and systems of National Technical Committee on Agricultural Machinery of Standardization Administration of China, and the member of Technical Committee of Association of Irrigation and Drainage Enterprises, China.
His research interests are mainly on the sprinkler and micro irrigation technology, development of water-saving irrigation equipment, and optimal design of water supply networks. He has published more than 70 papers and 4 books, and supervised 17 M.S. students and (currently 3 Ph.D. students and 7 M.S. students).
Recent Research Grants
Coupling effect of fertilizer and irrigated water on alfalfa using center pivot irrigation system in semi-arid region based on ET, Open Project of State Key Laboratory (2014-SKL-09), 2014-2015
Agricultural Water Transformation Processes Simulation and Water Productivity Improvement, China National Natural Science Fund (51321001), 2014-2016
Key technologies of high efficient utilization of irrigated water with sand used in agricultural irrigation, Research Project of Chinese Ministry of Education (113010A), 2013-2016
Effects of irrigated water sediment concentration on sprinkler wear and irrigation performance of sprinkler irrigation systems, China National Natural Science Fund (51179191), 2012-2015
Time-frequency characteristics of pressure fluctuations and flow-induced vibration of large centrifugal pump systems, China National Natural Science Fund (51139007), 2012-2016
Technologies and products of precise sprinkler irrigation, China National High Technology Research and Development Plan (2011AA100506), 2011-2015
Optimal design and cavitation characteristics research of Venturi injectors, Research Fund for the Doctoral Program of Higher Education of China (20120008110047), 2013-2015
Promotion of water-saving irrigation technology used in Artificial grasslands ,Ministry of Water Resources (TG1216), 2012-2014
Recent Publications in Reviewed Journals
Yuncheng Xu, Yan Chen, Jianjiang He, Haijun Yan. Detection of cavitation in Venturi injector with a combination method of strain gauges and numerical simulation. Journal of Fluids Engineering, 2014 (in press)
Haijun Yan, Jianwei Xiao, Wenying Li, Yongchong Li, Yongsheng Hou. Droplet size measurement of low-pressure damping sprinklers for center-pivot irrigation systems. Journal of Hydraulic Engineering, 2014 (in press)
Haijun Yan, Zijun Wang, Yan Chen. High speed video analysis of cavitation in a Venturi injector. Journal of Drainage and Irrigation Machinery Engineering, 2014, 32 (in press)
Pengfei Yu, Hongzhi Jin, Haijun Yan, Yongsheng Hou, Jiangyong Gao, Xiaogang Yang. Dynamic and hydraulic characteristics of centrifugal water motor for single-span center pivot irrigation system. Transactions of the Chinese Society for Agricultural Machinery, 2014, 45(4）:132-137
Pengfei Yu, Hongzhi Jin, Haijun Yan, Yong Zhu, Guining Xuan. Some problems and suggestions of the “action of water saving and grain increasing” implemented in northeast China. Water Saving Irrigation, 2013, (8):60-62
Yongchong Li, Haijun Yan, Chengbo Xu, Jianwei Xiao, Wenying Li. Simulation of sprinkler water distribution with droplet dynamics and evaporation. Transactions of the Chinese Society for Agricultural Machinery, 2013, 44(7):127-132
Haijun Yan, Yan Chen, Yuncheng Xu, Zhipeng Wang. Experimental investigation on cavitation characteristics of Venturi injector. Journal of Drainage and Irrigation Machinery Engineering, 2013, 31(8):724-728
Haijun Yan, Yan Chen, Xiaoyi Chu, Yuncheng Xu, Zhipeng Wang. Influence of optimization of structural parameters on injection performance of Venturi injector. Journal of Drainage and Irrigation Machinery Engineering, 2013, 31(2):162-166
Geng Bai, Kazuhiro Nakano, Tomomichi Mizukami, Sumihiko Miyahara, Shintaroh Ohashi, Yosuke Kubota, Ken-ichi Takizawa, Haijun Yan. Characteristics and classification of Japanese nozzles based on relative spray drift potential. Crop Protection, 2013, 46:88-93
Yang Liu, Haijun Yan, Kai Ma, Ji’ang Liu. Comparative research on sprinkler irrigation uniformity between R2000WF rotator and impact sprinkler. Water Saving Irrigation, 2012, (2):33-35, 39
Haijun Yan, Yan Chen, Xiaoyi Chu, Yuncheng Xu, Zhipeng Wang. Effect of Structural Optimization on Performance of Venturi Injector. 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012, July 30 - August 1, Beijing, China, 2012
G. Bai, K. Nakano, T. Mizukami, S. Miyahara, S. Ohashi, K. Takizawa, H. Yan. Nozzle classification system in Japan based on the relative spray drift potential. Proceedings of CIGR-Ageng 2012 (International Conference of Agricultural Engineering), July 8-10, Valencia, Spain, 2012
Hongzhi Jing, Haijun Yan, Yonghui Wang. Adaptability analysis of sprinkler irrigation technology and equipments in china. Agricultural Engineering, 2011, 1(4):42-45
Zhuqing Liu, Cong Guo, Haijun Yan. Influence of pump start- up time on performance of hydrocyclone used in irrigation system. Journal of Drainage and Irrigation Machinery Engineering, 2011, 29(6):492-496
Haijun Yan, Xiaoyi Chu. Numerical simulation for influence of throat diameter on Venturi injector performance. Journal of Drainage and Irrigation Machinery Engineering, 2011, 29(4):359-363
Haijun Yan, Geng Bai, Jianqiang He, Guan Lin. Influence of droplet kinetic energy flux density from fixed spray-plate sprinklers on soil infiltration, runoff and sediment yield. Biosystems Engineering, 2011, 110(2):213-221
Haijun Yan, Peipei Yang, Yong Zhu, Pengfei Yu. Nozzle configuration and software for center pivot irrigation system. Transactions of the Chinese Society for Agricultural Machinery, 2011, 42(6):84-88
Kai Ma, Haijun Yan, Yang Liu, Ji’ang Liu. Comparative research on hydraulic performance between R2000WF rotator and impact sprinkler. Water Saving Irrigation, 2011, (2):29-32
Geng Bai, Haijun Yan, Min Wang. Measuring sprinkler droplet size with modified flour methodology. Transactions of the Chinese Society for Agricultural Machinery, 2011, 42(4):76-80
Geng Bai, Haijun Yan. Effect of air drag coefficient on motion and evaporation of water droplet. Journal of Hydraulic Engineering, 2011, 42(4):448-453
Haijun Yan, Peipei Yang, Min Wang. Performance test and force analysis of pressure regulator used in irrigation system. Journal of Drainage and Irrigation Machinery Engineering, 2010, 28(6):548-552
Hongzhi Jing, Haijun Yan, Yichao Qian. Overseas development of water-saving irrigation engineering technology. Transactions of the Chinese Society for Agricultural Machinery(Supplement), 2010:59-63
Haijun Yan, Geng Bai, Jianqiang He, Yaojun Li. Model of droplet dynamics and evaporation for sprinkler irrigation. Biosystems Engineering, 2010, 106 (4):440-447.
Haijun Yan, Xiaoyi Chu, Min Wang, Zeyuan Ma. Injection performance of Venturi injector in micro-irrigation system. Journal of Drainage and Irrigation Machinery Engineering, 2010, 28(3):251-255, 264
Qiming Wang, Haijun Yan, Jinsan Ju, Changyun Liu. Numerical simulation of swing arm impact process to the PY140 impact sprinkler. Transactions of the Chinese Society for Agricultural Machinery, 2010, 41(1):86-91
Haijun Yan, Hongzhi Jin, Yichao Qian. Characterizing center pivot irrigation with fixed spray plate sprinklers. Science China Technological Sciences, 2010, 53(5):1398-1405
Zhifeng Yao, Fujun Wang, Ruofu Xiao, Haijun Yan, Min Wang, Zhuqin Liu. Key issues in pressure fluctuation experiments for centrifugal pumps. Journal of Drainage and Irrigation Machinery Engineering, 2010, 28(3):219-223
Fenfen Yu, Haijun Yan, Fujun Wang. Experimental Study on the Movement Properties of the Swing Arm for the PY130 Impact Sprinkler. Journal of Irrigation and Drainage, 2009, 28(6):68-71
Digui Yang, Kazuhiro Nakano, Daisuke Terano, Haijun Yan, Shintaroh Ohashi, Qingyun Chen. Numerical analysis on microclimate inside four single-span naturally ventilated greenhouse under various wind speeds and directions using CFD. The Journal of the Society of Agricultural Structures, Japan. 2009, 40(2):133-142
Haijun Yan, Yangjun Ou, Kazuhiro Nakano, Chengbo Xu. Numerical and experimental investigations on internal flow characteristic in the impact sprinkler. Irrigation and Drainage Systems. 2009, 23(1):11-23
Haijun Yan, Chengbo Xu, Wenhong Lu, Yangjun Ou. Numerical simulation of internal flow field in impact sprinkler. Journal of Hydraulic Engineering, 2009, 40(1):122-127
Haijun Yan, Yong Zhu, Gen Bai, Pengfei Yu. Discussion on application of large-sized sprinkler irrigation machines in Inner Mongolia autonomous region. Water Saving Irrigation, 2009, (1):18-21
