掺混生物柴油对STC柴油机最佳切换点的影响  

The Effect of Blended Biodiesel on the Optimal Switching Point of STC Diesel Engine

作　　者：毛进 唐铭沂 蔡浩 高占斌 尹自斌[1,2] MAO Jin;TANG Mingyi;CAI Hao;GAO Zhanbin;YIN Zibin(Marine Engineering College,Jimei University,Xiamen 361021,China;Fujian Provincial Key Laboratory of Naval Architecture and Marine Engineering,Xiamen 361021,China;CSSC Zhenjiang Co.,Ltd.,Zhenjiang 212002,China)

机构地区：[1]集美大学轮机工程学院,福建厦门361021 [2]福建省船舶与海洋工程重点实验室,福建厦门361021 [3]中船动力镇江有限公司,江苏镇江212002

出　　处：《集美大学学报（自然科学版）》2023年第2期156-162,共7页Journal of Jimei University：Natural Science

基　　金：福建省自然科学基金项目(2019J01705,2018J01491,2018J01499)。

摘　　要：为了改善掺混生物柴油时相继增压柴油机的燃烧及排放性能,研究柴油与生物柴油不同掺混比对相继增压柴油机1台增压器(1TC)与2台增压器(2TC)的最佳切换点的影响。配制不同掺混比例的生物柴油,实测在不同负荷下,生物柴油以体积掺混比分别为0%、5%、10%、15%、20%和25%时,柴油机最高燃烧压力、增压压力、涡轮前排温和燃油消耗率等数据,分析柴油机各项性能参数的变化,并按照经济性最优原则,找到1TC与2TC最佳切换点范围。实验结果表明:当掺混5%、10%、15%、20%和25%的生物柴油,相继增压柴油机在10%~40%负荷时,1TC的最高燃烧压力、增压压力、涡轮前排气温度以及燃油消耗率明显优于2TC;而在50%负荷时,1TC的燃油消耗率远超过2TC,柴油机经济性能下降;随着生物柴油掺混比增加,相继增压系统柴油机1TC~2TC最佳切换点略微前移;当掺混比至25%时,1TC与2TC最佳切换点为40%负荷。该研究对推进生物柴油在柴油机上的实际应用提供实验基础。To improve the combustion and emission of successive supercharged diesel engines when blending biodiesels,the effect of different blending ratios of diesel and biodiesels on the optimal switching point of one supercharger(1TC)and two superchargers(2TC)of successive supercharged diesel engines was investigated,biodiesels with different mixing ratios was prepared and blended at 0%,5%,10%,15%,20%and 25%by volume.Tests were conducted under different loads,and the maximum combustion pressure,supercharging pressure,turbo front temperature and fuel consumption rate of diesel engine were analyzed.The changes of various performance parameters of diesel engine were also invetigated,and the optimal switching point range of 1TC and 2TC was determined as per the principle of economic optimization.The experimental results show that the maximum combustion pressure,booster pressure,pre-turbine exhaust temperature and fuel consumption of 1TC are obviously better than those of 2TC when the biodiesel is blended with 5%,10%,15%,20%and 25%and the turbocharged diesel engine is charged at 10%-40%load.At 50%load,the fuel consumption rate of 1TC is much higher than that of 2TC,but the economic performance of diesel engine decreases.With the increase of biodiesel blending ratio,the optimum switching point of 1TC-2TC of diesel engine in successive supercharging system moves forward slightly.The optimal switching point between 1TC and 2TC is 40%load when blending ratio to 25%.The research provides an important experimental basis for advancing the practical application of biodiesel in diesel engines.

关 键 词：相继增压柴油机 生物柴油 动力性 经济性 最佳切换点 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]