本文關(guān)鍵詞：柴油機(jī)微粒捕集器非對稱孔道內(nèi)流場和壓降特性模擬　出處：《吉林大學(xué)學(xué)報(bào)(工學(xué)版)》2016年06期 　論文類型：期刊論文

  更多相關(guān)文章： 動(dòng)力機(jī)械工程 柴油機(jī)微粒捕集器 非對稱孔道 流場 壓降

【摘要】：采用Fluent建立了柴油機(jī)微粒捕集器(DPF)非對稱孔道的三維模型,計(jì)算了孔道內(nèi)的流動(dòng)和壓降特性,分析了DPF內(nèi)碳煙微粒的沉積過程,比較了不同壁面滲透率和碳載量下對稱孔道與非對稱孔道中的壓降特性。研究結(jié)果表明:進(jìn)口孔道速度沿軸向先增大后減小,出口孔道速度沿軸向逐漸減小;進(jìn)口孔道靜壓沿軸向先減小后增大,出口孔道靜壓沿軸向逐漸減小;碳煙微�？偸窍仍诳椎赖暮蠖顺练e,隨著碳載量增大,碳煙微粒沿孔道軸向分布逐漸趨向于均勻;絕對碳載量系數(shù)大于0.3時(shí),非對稱孔道相對于對稱孔道具有較小的壓降;進(jìn)、出口孔道比例越大,壓降受排氣流量的影響越大。
[Abstract]:Established by Fluent diesel particulate filter (DPF) three-dimensional model of asymmetric channel, flow and pressure drop characteristics of pore was calculated and analyzed in the deposition process of DPF soot particles, compared with symmetric and asymmetric pore pressure drop characteristics of different pore wall permeability and carbon loading in the study. The results show that the inlet channel velocity along the axial direction increases first and then decreases, the export channel speed decreases gradually along the axial direction; the import channel static pressure along the axial direction decreases first and then increases, export channels decreases gradually along the axial static pressure; soot particles is always first in the channel after the end of deposition, with carbon load increases, soot particles distribution along the axial direction tend to be uniform; the amount of carbon load coefficient absolute is greater than 0.3, asymmetric channels with respect to the symmetry of smaller pressure drop into the pore, pore; export ratio is greater, the pressure drop is affected by the flow of exhaust gas is greater.

【作者單位】： 天津大學(xué)內(nèi)燃機(jī)燃燒學(xué)國家重點(diǎn)實(shí)驗(yàn)室;天津市圣威科技發(fā)展有限公司;
【基金】：國家自然科學(xué)基金項(xiàng)目(51276128) 科技部中歐中小企業(yè)節(jié)能減排發(fā)展專項(xiàng)基金項(xiàng)目(SQ2013ZOA100012)
【分類號】：TK421.5
【正文快照】： pressure drop becomes more significant.0引言目前,國內(nèi)外對有效去除柴油機(jī)微粒的相關(guān)研究越來越重視�？刂撇裼蜋C(jī)微粒排放,不僅要發(fā)展機(jī)內(nèi)凈化技術(shù),還要采用必要的后處理技術(shù)[1-3],柴油機(jī)微粒捕集器(Diesel particulatefilter,DPF)是目前公認(rèn)的最為有效的去除柴油機(jī)排氣微

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