龚 呈1a, 钱付平1b, 徐志成2, 陈路敏1b, 刘 哲1a, 付跃虎1a
(1. 安徽工业大学 a. 建筑工程学院; b. 能源与环境学院, 安徽马鞍山243002;2. 上海邗越智能科技有限公司, 上海201400)
DOI:10.13732/j.issn.1008-5548.2021.05.006
收稿日期: 2021-03-13,修回日期:2021-04-08,在线出版时间:2021-08-17 15:13。
基金项目:安徽省科技攻关项目,编号:1301042113。
第一作者简介:龚呈(1996—),男,硕士研究生,研究方向为工业通风与空气净化。E-mail:1317134745@qq.com。
通信作者简介:钱付平(1974—),男,教授,博士生导师,研究方向为工业通风与空气净化。E-mail:fpingqian@ahut.edu.cn。
摘要:针对重型车自洁式空气滤清器的脉冲清灰装置,利用数值模拟方法,采用壁面峰值压力和速度的相对标准偏差作为评价指标,研究空气滤清器的喷吹管长度、喷嘴直径和脉冲清灰压力等对清灰性能的影响。结果表明:在245、265、285、305、325、345 mm 6种喷吹管长度中,较长的喷吹管能有效提高滤芯内表面峰值压力,当喷吹管长度为345 mm时,滤芯内表面的壁面峰值压力最大且流场均匀性最佳;脉冲清灰喷嘴直径对清灰的影响主要表现在脉冲清灰的喷射气流量上,喷嘴直径越大,壁面峰值压力越大,流场均匀性越好,当喷嘴直径为22 mm时,峰值压力最高且流场均匀性最佳;在0.5、0.6、0.7、0.8 MPa这4种压力工况条件下,当脉冲清灰压力为0.8 MPa时,壁面峰值压力最大且流场均匀性最佳,此时滤清器的清灰性能最佳。
关键词:重型车;空气滤清器;脉冲清灰;数值模拟
Abstract:Based on the pulse dust cleaning device of self-cleaning air filter for heavy duty vehicles,the effects of the injection pipe length,the nozzle diameter and the pulse dust cleaning pressure of the air filter on the dust cleaning performance were studied by the numerical simulation method and the peak wall pressure and the relative standard deviations of velocity were used as evaluation indexes. The results show that in the 6 kinds of the injection pipe length,such as 245,265,285,305,325 and 345 mm,the longer injection pipe can effectively improve the peak pressure on the inner surface of the filter element. When the length is 345 mm,the peak pressure on the inner surface is the largest and the flow uniformity is the best. The influence of the nozzle diameter on the pulse dust cleaning is mainly that the nozzle diameter will affect the gas flow of the pulse dust cleaning.The nozzle diameter is larger,the peak wall pressure is larger and the flow uniformity is better. When the nozzle diameter is 22 mm,the peak wall pressure is the largest and the flow uniformity is the best. Under the 4 pressure conditions,such as 0. 5,0. 6,0. 7 and 0. 8 MPa,when the pulse dust cleaning pressure is 0. 8 MPa,the peak wall pressure is the largest and the flow uniformity is the best,so the dust cleaning performance is the best at this pressure.
Keywords:heavy duty vehicle; air filter; pulse dust cleaning; numerical simulation
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