您现在的位置: 首页> 研究主题> 乙醇柴油

乙醇柴油

乙醇柴油的相关文献在2002年到2020年内共计154篇,主要集中在能源与动力工程、化学工业、公路运输 等领域,其中期刊论文81篇、会议论文21篇、专利文献58733篇;相关期刊53种,包括农机化研究、农业工程学报、炼油技术与工程等; 相关会议18种,包括2016年APC联合学术年会、中国内燃机学会燃烧节能净化分会2015年学术年会、2014年APC联合学术年会等;乙醇柴油的相关文献由264位作者贡献,包括孙平、胡鹏、梅德清等。

乙醇柴油—发文量

期刊论文>

论文:81 占比:0.14%

会议论文>

论文:21 占比:0.04%

专利文献>

论文:58733 占比:99.83%

总计:58835篇

乙醇柴油—发文趋势图

乙醇柴油

-研究学者

  • 孙平
  • 胡鹏
  • 梅德清
  • 黄荣华
  • 张武高
  • 邓鹏
  • 马寅杰
  • 吕兴才
  • 黄胜
  • 黄震
  • 期刊论文
  • 会议论文
  • 专利文献

搜索

排序:

年份

    • 董世军; 杨灿; 欧彪; 卢宏广; 徐浩成; 成晓北
    • 摘要: 基于一台单缸柴油机,采用进气道喷射乙醇同时缸内直喷柴油的方式实现双燃料预混压缩着火(PCI)燃烧模式.固定发动机转速和负荷,通过调整预混乙醇比例以及柴油直喷策略,实现了不同程度的混合气燃料分层,并测量了相应的发动机循环波动特性,试验中NOx排放和COVIMEP分别控制在0.4 g/(kW·h)和7%以下.结合数值模拟研究了混合气燃料分层对双燃料发动机循环波动的影响,结果表明:燃料分层直接影响双燃料发动机循环波动.首先,着火正时在上止点附近时有助于降低双燃料发动机循环波动,乙醇预混当量比、柴油直喷中主喷油量以及主喷正时直接影响混合气初始着火区域燃料活性以及当量比,进而影响混合气着火正时.其次,混合气着火正时稳定性对于保证双燃料发动机燃烧稳定性较为关键.此外,燃烧相位以及缸内爆压不变,采用较高的乙醇预混比例结合推迟的主喷正时可以实现更加稳定的着火,进而降低双燃料发动机循环波动率.
    • 王兆文; 伍尚; 李磊; 张新华; 唐劼; 成晓北
    • 摘要: A constant volume combustion bomb system was adopted to optically research the cold spray,vaporization spray and spray combustion characteristics of mixed diesel blending with ethanol or water.Results show that the spray expansion capacity of mixed diesels under low ambient temperature is poor compared with that of pure diesel,since the viscosities of mixed diesels are greater.However,ethanol and water will give priority to vaporize and microexplode due to their lower boiling point,the vaporization and micro-explosion of ethanol and water will significantly enhance the spray expansion capacity.In terms of spray combustion,the blending of ethanol and water will restrain the ignition of diesel.Besides,the integrated natural flame luminosity property of mixed diesels and pure diesel demonstrate that the blending of ethanol can improve the combustion efficiency of diesel,increase the combustion temperature and accelerate the oxidation of soot;the blending of water can decrease the combustion temperature and soot generation.Both these two mixed diesels can reduce the soot emission than pure diesel.In addition,the upstream development of flame in water emulsified diesel is the slowest and pure diesel is the fastest,while the trend in downstream is totally opposite.This indicates that with the increase of local temperature from upstream to downstream,the effect of water micro-explosion on spray and combustion is more significant.%采用预燃式定容燃烧弹系统,可视化研究了掺混乙醇和水对柴油冷态喷雾、蒸发喷雾及燃烧等特征的影响规律.结果表明:掺混乙醇和水会使混合燃油黏度增大,从而使乙醇柴油和掺水乳化柴油冷态喷雾的扩展能力明显低于纯柴油;乙醇和水在高温下的微爆或汽化,不仅能增强混合柴油喷雾的扩展能力,同时也可以促进液滴的分裂,强化油、气的混合;在喷雾燃烧中,3种燃油的滞燃期为纯柴油<乙醇柴油<掺水乳化柴油,这表明乙醇和水的掺人均会抑制柴油的着火,延长滞燃期;乙醇的加入能提高柴油的燃烧效率和燃烧温度并使碳烟的氧化速率增大;水分的加入则可降低燃烧温度和碳烟的生成,加上水煤气反应能促进碳烟的消亡,从而使乙醇柴油和掺水乳化柴油的碳烟排放均比纯柴油小;在上游低温区,掺水乳化柴油的燃烧速度最小,纯柴油最大,在下游高温区则相反,掺水乳化柴油的燃烧速度最大,纯柴油最小,这表明随着环境温度的增高,水分微爆和蒸发对喷雾和燃烧的促进作用越来越显著.
    • 刘燕德; 叶灵玉; 唐天义; 欧阳爱国; 孙旭东; 张宇
    • 摘要: 利用中红外光谱和化学计量学实现了对乙醇柴油各项性能指标的定量分析.实验样品96个,为32种不同浓度的乙醇柴油溶液.采用S-G平滑、MSC、微分处理(1stD和2ndD)、SNV等四种方法对光谱数据进行预处理,并结合八种波段筛选方法(UVE,CARS,SPA,RPLS,UVE-SPA,UVE-CARS,SPA-CARS,UVE-SPA-CARS)对乙醇柴油MIR光谱数据进行处理,分别建立乙醇柴油密度、粘度、乙醇含量的PLSR模型,得出以下主要结论:综合比较八种变量筛选方法,发现UVE-SPA-CARS-PLS对乙醇含量的建模效果最好,模型预测集的Rp和RMSEP分别为0.9781和0.8255.变量筛选较原始光谱建立的模型来说,不仅模型输入数量减少,预测效果也有所提高.
    • 欧阳爱国; 张宇; 唐天义; 刘燕德
    • 摘要: 乙醇柴油作为清洁燃料是柴油很好的替代品,不同乙醇含量的乙醇柴油其粘度有差别,而乙醇的含量直接影响着柴油机燃烧性能.所以急需一种方法实现快速对乙醇柴油主要指标在线监测.对采集到的不同浓度的乙醇柴油的原始拉曼光谱数据使用Savitzkv-Golay平滑(S-G)、多元散射校正(MSC)、微分处理(1stD和2ndD)、标准正态变量校正(SNV)等四种方法以及他们的组合方法对光谱数据进行预处理后,分别建立了乙醇柴油密度、粘度和乙醇含量的偏最小二乘回归(PLSR)模型,比较不同的预处理方法发现,乙醇含量和粘度在S-G+2ndD预处理后所建立的PLSR模型效果最好,预测集Rp分别为0.930和0.918,RM-SEP分别为1.237和0.034;S-G+1stD预处理后所建立的乙醇柴油密度PLSR模型结果最优,预测集Rp最大,为0.962,RMSEP最小,为0.14×10-2.将经过S-G+2ndD预处理后的光谱数据选用递归偏最小二乘算法(RPLS)、无信息变量消除(UVE)、正自适应加权算法(CRES)、连续投影算法(SPA)四种变量筛选方法以及将它们组合筛选得到的波长变量分别作为输入变量建立了PLSR模型,在使用SPA-CARS波长筛选方法所建立的乙醇柴油乙醇含量的预测模型效果最优,其预测集的Rp,RMSEP分别为0.9781和0.8255.结果表明使用该方法可以很好的对乙醇柴油的密度、粘度以及乙醇含量等主要指标进行预测.%Ethanol diesel as a clean fuel is a good substitute for diesel fuel.Different content of ethanol diesel oil viscosity is dif-ferent ,and the ethanol in the ethanol content of diesel fuel affects the quality of combustion ,so we need have an instrument or method to achieve Ethanol Diesel Ingredients and Main Indicators Online Monitoring.In this paper ,Savitzkv-Golay smoothing (SG) ,multiple scattering correction (MSC) ,differential processing (1st D and 2nd D) ,standard normal variable correction (SNV) ,and so on were used to calculate the original Raman spectra.The PLSR model of ethanol diesel density ,viscosity and ethanol content was established by using different pretreatment methods for the original Raman spectra of different concentra-tions of ethanolic diesel.Compared with different pretreatment methods ,the ethanol content and viscosity of PLSR model estab-lished by S-G+2nd D pretreatment has the best effect ,the prediction set Rp is 0.930 and 0.918 respectively ,RMSEP is 1.237 and 0.034 respectively.The PLSR model of ethanol diesel density after SG+1stD pretreatment is the best method.The optimal set of Rp is 0.962 ,RMSEP is 0.14 × 10-2.The wavelength model was selected by Recursive partial least squares(RPLS) ,Un-informative variables elimination(UVE) ,Compctitive Adaotive Reweighted Sampling(CRES) ,Successive Projections Algorithm (SPA) wavelength screening method after S-G+2ndD pretreatment ,and the PLSR model was established.The prediction model of ethanol content of ethanol diesel oil was optimized by SPA-CARS wavelength screening method.The Rp and RMSEP were 0.9781 and 0.8255.The results show that the method can be used to predict the main indexes such as density ,viscosity and ethanol content of ethanol diesel.
    • 高莹; 麻斌; 邓海鹏; 刘宇; 刘洪岐; 王亚娣
    • 摘要: To research the nozzle cavitation and near-field spraying characteristics,visualization experiments were carried out using a high-speed camera and a single transparent up-sized nozzle to observe the nozzle cavitation and near-field spraying behavior of three ethanol-diesel blended fuels with the volume fractions of ethanol of 0%,5%,10%.The normalized cavitation length,discharge coefficient,cavitation number,Reynolds number and near-field spraying cone angle were analyzed under the injection pressures of 0.16-0.36 MPa.The three ethanol-diesel blended fuels were named E0D100N0,E5D90N5 and E10D85N5 respectively,wherein the letters of E,D and N represent ethanol,diesel and n-butanol respectively while the subscripts indicate the volume fraction of each component.The experimental results showed that,with the increase of volume fraction of ethanol,the threshold injection pressures corresponding to original cavitation and super cavitation were decreased,and the periods of developing cavitation were shortened but the periods of supercavitation were extended.During the no-cavitation stage,the change of volume fraction of ethanol had no obvious influence on near-field spraying cone angle;during the developing cavitation stage,the near-field spraying cone angle increased with the increase of volume fraction of ethanol;and during the hydraulic flip stage,the near-field spraying cone angles of three blended fuels were all close to zero.Under the same injection pressure,the discharge coefficients and the Reynolds numbers of E0D100N0,E5D90N5 and E10D85N5 increased in sequence,and when hydraulic flip appeared inside the nozzle,the discharge coefficients and the Reynolds numbers of these three blended fuels were all decreased sharply.%为了完善乙醇-柴油混合燃料的喷嘴孔内空化现象及近场喷雾特性研究,利用高速摄像机和放大尺寸单孔透明喷嘴观察乙醇体积分数分别为0%、5%和10%的3种乙醇-柴油混合燃料在喷孔中的两相流动及近场喷雾,在喷射压力为0.26~0.46 MPa的范围内对空化特征长度、流量系数、空化数、雷诺数等特性参数及喷嘴近场喷雾特性进行了分析.将3种混合燃料分别命名为E0 D100 N0、E5D90 N5和E10 D85 N5,其中E、D、N分别代表燃料中的乙醇、柴油和助溶剂正丁醇,下标表示各成分的体积分数.试验结果表明:随着燃料中乙醇含量的增加,E0 D100 N0、E5 D90 N5和E10 D85 N5的空化初生及超空化对应的阈值喷射压力依次降低,空化发展期逐渐缩短,超空化期相应延长;在无空化和空化初生期乙醇含量的改变对近场喷雾锥角的影响并不明显,在空化发展期和超空化期,3种燃料近场喷雾锥角随乙醇含量的提高而增大,在柱塞流阶段,3种燃料近场喷雾锥角均接近0°;在同等喷射压力下,E0 D100 N0、E5 D90 N5和E10 D85 N5对应的流量系数和雷诺数依次增大,在柱塞流阶段,3种燃料对应的流量系数和雷诺数均急剧下降.
    • 欧阳爱国; 唐天义; 王海阳; 刘燕德
    • 摘要: 乙醇柴油是柴油替代品的一种,它的使用越来越广泛,乙醇柴油品质由许多指标决定,采用传统方法检测这些指标不仅价格昂贵而且耗时长.近红外光谱技术是一种廉价、快速实时在线检测乙醇柴油品质的有效方法.本文采用近红外光谱技术结合最小二乘支持向量机检测了乙醇柴油的密度、粘度和乙醇含量,比较了线性和非线性校正技术(主成分回归、偏最小二乘回归和最小二乘支持向量机)对乙醇柴油品质的分析效果,同时也比较了不同预处理方法对预测模型能力的影响.实验结果表明,最小二乘支持向量机优于主成分回归和偏最小二乘回归模型,其对乙醇柴油密度、粘度、乙醇含量建模效果最优,相关系数分别是0.995 8、0.995 7和0.995 3;预测均方根误差分别为0.000 68、0.011 3和0.571 4.%Ethanol diesel is one of the alternatives for the diesel, which is used more and more widely.Many indicators reflect the quality of diesel ethanol fuel.It is not only expensive but also time consuming to detect these indicators with traditional method.Near infrared spectroscopy method is an inexpensive, fast and real time online test for the quality of ethanol diesel oil.In this paper, the density, viscosity and the quality of the ethanol content of diesel are detected, and the analysis effect on the quality of ethanol diesel are compared by linear and non-linear calibration technology, including principal component regression, partial least squares regression and least squares support vector machines(LSSVM), and the effects of different pretreatment methods on the prediction model capabilities are also compared.Experimental results show that LSSVM is better than the principal component regression and partial least squares regression model, with the optimal modeling effect on the density of ethanol-diesel, viscosity, alcohol content.The correlation coefficients are 0.995 8, 0.995 7 and 0.995 3, and the root mean square error of prediction are 0.000 68, 0.011 3 and 0.571 4, respectively.
    • 胡鹏; 王伟; 琚雪明
    • 摘要: 为探讨燃料特性促进柴油机缸内乙醇柴油雾化过程的影响机理,采用单组份十四烷代替实际多组分柴油,利用经典KH模型和TAB模型数值分析燃料特性对乙醇-正丁醇-十四烷混合燃料初次和二次雾化的影响规律.结果表明,十四烷中掺混乙醇和正丁醇后初次雾化团块液核半径和破碎时间均降低,有助于燃油在喷油器油嘴附近撕裂,促进柴油机近喷嘴区燃油初次雾化;在相同的条件下,乙醇柴油理化性质对二次雾化的影响很小;液滴半径越小,破碎后Sauter平均半径和破碎时间对半径增量敏感性越强,越容易发生二次雾化;良好初次雾化和液滴蒸发特性促进液滴二次雾化和液滴蒸发.
    • 胡鹏; 吴昌雷; 王伟
    • 摘要: 利用台架试验,开展乙醇柴油发动机燃烧过程对助溶剂感受性的研究.获得燃用乙醇柴油/柴油时气缸压力、放热率、预混合及扩散燃烧持续期和热量分配、燃烧重心变化规律.与柴油相比,在转速为1 800 r/min,柴油机燃用三种燃料,负荷为25%的工况下,缸内压力差异较小,在100%负荷时缸内压力曲线差异增加.在25%负荷时,N5E10放热峰值>B10E10放热峰值>柴油放热峰值;在100%负荷时,柴油放热峰值>B10E10放热峰值>N5E10放热峰值.在转速为1 800 r/min,负荷为25%的工况下,发动机的放热曲线呈双峰分布,在其余工况下,柴油机放热两阶段的界限并不明显,总体呈单峰分布.乙醇柴油发动机预混合燃烧期缩短,预混合燃烧阶段放热量比例降低,扩散燃烧期缩短,燃烧重心更加向上止点靠近.
    • 胡鹏; 孙平; 梅德清
    • 摘要: 运用扫描电子显微分析仪(SEM)、PHO EN-TX60S-X射线能谱仪和Euro VectorEA3000有机元素分析仪对柴油机燃用乙醇柴油时排放颗粒物特征进行试验分析,研究了柴油中掺混乙醇比例及助溶剂对乙醇柴油燃烧颗粒组织形貌和化学成分的影响.研究结果表明:乙醇柴油燃烧颗粒中C、H质量分数降低,组织形貌与原机呈现出不同的特征,从疏松多孔的海绵状向松散的块状分布转变.由于乙醇柴油是含氧燃料,其燃烧颗粒采样滤纸的SEM图中呈现清晰的纤维轮廓线.与柴油颗粒相比,E6(S)、E11(S)和E11(C)燃烧颗粒中C元素分别降低15.70%、25.30%和25.55%,H元素分别降低了2.26%、8.06%和10.32%.随着乙醇掺混比增加,纤维交叉处出现较多弧形过渡的膜状物质,且颗粒轮廓变得模糊.复配乳化剂使乙醇柴油燃烧颗粒采样滤纸的SEM图中的纤维轮廓和PM轮廓更为清晰.E6(S)、E11(S)和E11(C)燃烧颗粒物样品中S元素含量低于柴油,柴油机燃用乙醇柴油有利于降低硫酸盐颗粒.
    • 胡鹏; 孙平; 宁海强; 邬齐敏; 梅德清
    • 摘要: 研究了乙醇柴油及燃油添加剂对柴油机颗粒排放及其挥发氧化特性的影响.采用热重分析法分析柴油机燃用不同燃料时排气颗粒物的可溶性有机物挥发性、碳烟样品和颗粒物氧化特性.研究结果表明:含添加剂的乙醇柴油颗粒物排放远低于0 #柴油的颗粒物排放,降幅在50%以上.颗粒在热失重过程中经历颗粒失水干燥、可溶性物质氧化和烟煤基元发生氧化反应三个阶段.与0 #柴油相比,乙醇柴油及柴油添加剂能降低颗粒物中的可挥发部分质量份额,且乙醇柴油的效果最佳.乙醇及柴油添加剂有助于降低碳烟起燃温度和最大氧化速率对应的温度;与0 #柴油相比、N5E10、N5E10XY0.1%和N5E10CN0.3%的碳烟最大氧化速率对应的温度依次降低了39、92、146°C.
  • 查看更多

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号