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Optimization of structural parameters of fan-shaped high-pressure nozzle |
LIANG Bojian1,GAO Dianrong2* |
1. Eaton Fluid Power(Shanghai)Co. Ltd., Shanghai 200131, China;2. School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China |
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Abstract Effects of structure parameters of a fan-shaped high-pressure nozzle on jet performance were simulated numerically and confirmed experimentally. The structural parameters include divergent angle, inner conical hole depth and convergent angle, and the jet performance is in terms of jet coverage angle and flow rate. The quadratic rotation orthogonal combination design method was utilized to set up design cases based on three structural parameters and their five levels, and then the cases were analyzed in CFD software-Fluent; finally, the CFD results were subject to statistical significance test and analysis of variance(ANOVA), consequently the corresponding regression equations were established. the optimized structural parameters were determined from these regression equations by using response surface method combined with weighting method. The results show that the effect of inner conical hole depth on the performance is the most significant(P<0.000 1). When the divergent angle, inner conical hole depth, and convergent angle are 68°, 8 mm and 65°, respectively, the flow rate and coverage angle increase to 27.8L/min and 45.3°. Under this condition, the fan-shaped nozzle performance is significantly improved, and a better cleaning effect should be secured.
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Received: 22 April 2018
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