低压纯压力雾化喷嘴的结构优化与试验研究OA

To address the common issues of limited atomization range and poor atomization uniformity exhibited by various nozzles under low-pressure conditions,the relationship between nozzle structure parameters and atomization performance was comprehensively analyzed using the response surface methodology.Based on the analysis,a combined optimization design was subsequently carried out.Un-der the working pressure ranging from 0.10 to 0.30 MPa,a series of single-factor tests were conducted.The independent variables were the nozzle outlet diameter,the thimble cone angle,and the distance between the thimble and the nozzle outlet.The response variables were the Sauter mean diameter of droplets and the droplet distribution width.The experimental results reveal that,in descending order,the influence of each factor on the average Sauter mean diameter of droplets is as follows:p(water pressure),d(nozzle outlet diameter),h(distance between the thimble and the nozzle outlet),θ(thimble cone angle).Similarly,for the droplet distribution width,the order of influence is θ,h,p,d.The Box-Behnken response surface method was adopted to solve the problem through multi-response optimization.As a result,an optimized combination of nozzle parameters is obtained as follows:p=0.30 MPa,d=1.42 mm,h=1.02 mm,and θ=120.31°.The research findings hold significant theore-tical implications and practical value for the combined optimization of atomizers under medium-to-low-pressure conditions.