排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2013, Vol. 31 Issue (2): 162-166    DOI: 10.3969/j.issn.1674-8530.2013.02.015
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Influence of optimization of structural parameters on injection performance of Venturi injector
 YAN  Hai-Jun, CHEN  Yan, CHU  Xiao-Yi, XU  Yun-Cheng, WANG  Zhi-Peng
(College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China)
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Abstract In order to reduce the required inletoutlet pressure difference of Venturi injector and improve the injection efficiency, adopting orthogonal design method, seven key structural parameters of Venturi injector were chosen to build eighteen structural parameter schemes, which were simulated by CFD technology and analyzed. Taking injection efficiency as an evaluation index, a most optimal structure combination was put forward and a sample was accordingly made and compared with the primary injector in this regard. Results showed that, when inlet pressure was kept constant, the injection flow rate of Venturi injector increased as the inletoutlet pressure difference expanded. For a given injection flow rate, a larger pressure difference was required as inlet pressure increased. Injection flow rate had an average increase of 1146%, and the maximum injection flow rate had an average increase of 315% after optimizing structural parameters. Under different inlet pressures, when starting injection, the critical pressure ratio of outlet pressure to inlet pressure was almost kept a constant value. For parameters before and after optimization, the average value of critical pressure ratio increased from 046 to 061, which indicated that the working pressure range of Venturi injector had been enlarged after optimization, and verified the reliability of structural optimization design and numerical simulation.
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Articles by authors
YAN Hai-Jun
CHEN Yan
CHU Xiao-Yi
XU Yun-Cheng
WANG Zhi-Peng
Key wordsVenturi injector   structural optimization   injection performance   orthogonal design   experiment     
Received: 2012-05-17; Published: 2013-02-28
Cite this article:   
YAN Hai-Jun,CHEN Yan,CHU Xiao-Yi et al. Influence of optimization of structural parameters on injection performance of Venturi injector[J]. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(2): 162-166.
 
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