超音速喷嘴与传统喷嘴喷雾对比分析
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摘要
在分析喷嘴喷雾机理的基础上,确定了超音速喷嘴的结构参数,采用数值模拟方法分析了基于拉瓦尔效应的气水超音速喷嘴与传统压力旋流喷嘴的喷雾性能。结果表明,在喷雾外流场中,超音速喷嘴雾滴颗粒速度与扩散角都要大于传统压力旋流喷嘴;同一喷雾截面,超音速喷嘴的雾滴颗粒直径上小于压力旋流喷嘴,随喷雾距离的增加两种喷嘴的雾滴粒径均呈现增大的趋势。超音速喷嘴的雾化性能优于传统压力旋流喷嘴。
Based on analyzing the nozzle spray mechanisms,and the structure parameters of supersonic nozzle were confirmed. Numerical simulations were carried out to analyse the spray performance of gas-water two-phase supersonic nozzle and traditional pressure swirl nozzle. Results shows that,the spray velocity and diffusion angle of supersonic nozzle were larger than those of traditional pressure swirl nozzle in spray external flow field. The droplet diameter of supersonic nozzle was smaller than that of pressure swirl nozzle in same spray section,and the droplet size of both nozzles increased with the increase of spray distance. The spray performance of supersonic nozzle is better than that of traditional pressure swirl nozzle.
Based on analyzing the nozzle spray mechanisms,and the structure parameters of supersonic nozzle were confirmed. Numerical simulations were carried out to analyse the spray performance of gas-water two-phase supersonic nozzle and traditional pressure swirl nozzle. Results shows that,the spray velocity and diffusion angle of supersonic nozzle were larger than those of traditional pressure swirl nozzle in spray external flow field. The droplet diameter of supersonic nozzle was smaller than that of pressure swirl nozzle in same spray section,and the droplet size of both nozzles increased with the increase of spray distance. The spray performance of supersonic nozzle is better than that of traditional pressure swirl nozzle.
引文
[1]蒋仲安,王明,陈举师,等.气水喷嘴雾化特征与降尘效果分析[J].哈尔滨工业大学学报,2017,49(2):151-157.
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[7]于喜良,赵麦群,祁亮德,等.超音速雾化器的气体流场分布研究[J].粉末冶金技术,2005,23(1):22-25.
[8]赵新明,徐骏,朱学新,等.超音速气雾化中导液管突出长度对气体流场的影响[J].中国有色金属学报,2009,19(5):967-973.
[9]周文祥,黄金泉,周人治.拉瓦尔喷管计算模型的改进及其整机仿真验证[J].航空动力学报,2009,24(11):2 601-2 606.
[2]王鹏飞,刘荣华,王海桥,等.煤矿井下气水喷雾雾化特性实验研究[J].煤炭学报,2017,42(5):1 214-1 210.
[3]杨超,陈波,姜万录,等.基于拉瓦尔效应的超音速喷嘴雾化性能分析与实验[J].农业工程学报,2016,32(19):57-64.
[4]马中飞,樊博,张震.基于Fluent的压气水自吸风喷雾与常规喷雾比较分析[J].工业安全与环保,2014,40(12):80-82.
[5]高全杰,汤红军,汪朝晖,等.基于Fluent的超音速喷嘴的数值模拟及结构优化[J].制造业自动化,2015,37(2):88-90,108.
[6]程江峰,马齐江,王开松,等.气体压强对新型超音速气雾化喷嘴流场的影响[J].煤矿安全,2017,48(2):160-162,166.
[7]于喜良,赵麦群,祁亮德,等.超音速雾化器的气体流场分布研究[J].粉末冶金技术,2005,23(1):22-25.
[8]赵新明,徐骏,朱学新,等.超音速气雾化中导液管突出长度对气体流场的影响[J].中国有色金属学报,2009,19(5):967-973.
[9]周文祥,黄金泉,周人治.拉瓦尔喷管计算模型的改进及其整机仿真验证[J].航空动力学报,2009,24(11):2 601-2 606.