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Optimization of structural parameters of capillary jet tee and experimental validation |
WANG Xuan1, WANG Xinkun1*, FAN Erdong1, XU Shengrong1, XUE Zilong1, ZHANG Chenxi1, DING Shiwei2 |
1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Shandong Taishan Pumped Storage Power Station Co. Ltd., Taian, Shandong 271000, China |
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Abstract In order to improve pulse characteristics of capillary jet tee, 25 sets of capillary jet tee mo-dels were designed by using the method of orthogonal design of experiments in the paper. In the designs, six geometrical factors, namely, nozzle width, nozzle depth, control tube width, position difference, laying length and side wall angle, were selected and 5 levels were specified for each factor. 25 jet tee models were simulated with CFX software. Pulse frequency, head amplitude and pressure diffe-rence were selected as experimental evaluation indexes. The influence of structural parameters on pulse characteristics was analyzed by the range method, and the rank of factors was determined. The statistics significance of the influencing factors was analyzed by using the variance method, and the optimal structure model was determined. Based on the experimental results, at the inlet pressure of 50 to 120 kPa, the pulse frequency of the optimal model was increased by 3 to 10 times/min compared with the 4 mm nozzle width jet tee, the head amplitude was enhanced by 3.2 to 11.1 kPa and the uniformity coefficient of irrigation was better by 0.53% to 1.94%, the flow deviation rate was reduced by 0.81% to 5.33%. The optimized jet tee model can provide continuous and stable pulsed water flow; thus, the pulse performance has been enhanced greatly, which can improve the uniformity of irrigation effectively.
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Received: 08 May 2019
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