第40卷(2018)第5期性能与排放
柴油机 Diesel Engine
Vol. 40(2018) No. 5
喷嘴结构参数对喷雾和燃烧特性的影响
史俊杰，胡江涛”，耿培林”，张德福”，姚春德”，闫晓娜（1.天津大学内燃机燃烧学国家重点实验室，天津300072：
2.天津理工大学，天津300384：3.中国内燃机工业协会，北京100825）
摘要：为探究高喷射压力条件下小孔径喷嘴内部结构对燃油喷雾和燃烧特性的影响，采用相位多普勒粒子分析系统(PDPA)和高温定容燃烧弹系统试验研究了采用挤研技术处理的喷嘴与筹孔喷嘴的喷雾与燃烧特性。试验结果表明：相同喷射条件下挤研无助于改善燃油喷雾的索特平均直径（SMD），随着喷孔挤研量的增大，喷雾SMD持续增大，燃烧生成的碳烟量不断增多：随着孔间距增大，喷雾SMD先增大后减小，而碳烟生成量表现出相同的变化趋势，簇孔间距为0.4mm时，
燃烧峰值放热率最高，单孔与0.2mm间距孔的峰值放热率差别不大。关键词：喷嘴结构；喷雾：燃烧：碳烟
中图分类号：TK421*.2文献标识码：A
文章编号：1001-4357（2018)05-0001-06
Effects of Nozzle Geometry on Spray and Combustion Characteristics Shi Junjie', Hu Jiangtao',Geng Peilin',Zhang Defu',Yao Chunde',Yan Xiaona
(1. State Key Laboratory of Engines, Tianjin University, Tianjin 300072;
2.Tianjin University of Technology, Tianjin 300384;
3. China Internal Combustion Engine Industry Association, Beijing 100825)
Abstract : In order to investigate the effects of internal structure of the small diameter nozzle on fuel spray and combustion characteristics under the condition of high injection pressure, the experiments were car-ried out to systematically research the spray and combustion characteristics of spray grind nozzle and group - hole nozzle by applying phase doppler particle analysis system (PDPA) and high temperature constant volume bomh system. The results of experiments showed that grind had no contribution to de-crease the SMD of fuel spray under the condition of the same injection ; with the increasing grind level of spray nozzle, the SMD together with the amount of soot generated from combustion increased continuous-ly; as the space of group-hole increased, SMD increased firstly and then decreased; the amount of soot formation also showed the same trend; heat release rate reached a peak when the space of group-hole is O. 4 mm, the peak value of the heat release rate between a single hole and the group-hole of 0. 2 mm space differs a little.
Key words: nozzle geometry; spray; combustion; soot
0引言
目前柴油机正朝着高喷油压力和小孔径喷油器
的发展方向，通过改善燃油的雾化特性来提高燃油的燃烧品质，实现内燃机高效和清洁地燃烧，以适应内燃机的发展要求1。国内外学者对此也积极
收稿日期：2017-1-28
基金项目：本课题得到天津市自然科学基金支持，编号：15LCYBJC21300
作者简介：史俊杰（1993-），男，工程师，主要研究方向为案油机清洁燃烧和排放后处理，m15222896063@163.cor