-
摘要:
汽油直喷喷雾贯穿度、锥角等宏观喷雾特性，对研究汽油直喷发动机喷雾及燃烧的发生、发展具有重要意义。在设计并建立汽油直喷（GDI）系统的基础上，搭建定容燃烧弹系统和激光测试系统，基于LSD测试技术，研究了喷油压力和背景压力对汽油直喷宏观喷雾特性的影响。通过试验发现，随喷油压力增加，相同喷油时刻下的贯穿度逐渐增加。随背景压力增加，相同喷油时刻下的贯穿度逐渐减少。在不同喷油压力和背景压力下，随着喷射时间的发展，贯穿度均逐渐增加，喷雾锥角为38°~50°。
Abstract:It is important to study the direct injection spray penetration and spray cone angle characteristics of gasoline for the occurrence and development of spray and combustion characteristics in gasoline direct injection engine. Based on the design and building of gasoline direct injection (GDI) system, the constant volume combustion bomb system and the optical testing system are established, and based on LSD measurement technique, the influence of injection pressure and back pressure on the spray characteristics of GDI engine is studied in this paper. The experiment shows that with the increase of injection pressure, the penetration at the same injection time gradually increases. With the increase of back pressure, the penetration at the same injection time decreases gradually. Under different injection pressure and back pressure, with the development of injection time, the penetration gradually increases, and the spray cone angle is between 38° and 50°.
-
Key words:
- laser diagnostics /
- spray /
- internal combustion engine /
- direct injection /
- image processing
-
图 8 喷雾贯穿度随喷油压力的变化规律
Figure 8. Variation rule of spray penetration with injection pressure
图 9 喷雾锥角随喷油压力的变化规律
Figure 9. Variation rule of spray cone angle with injection pressure
图 11 喷雾贯穿度随背景压力的变化规律
Figure 11. Variation rule of spray penetration with back pressure
表 1 试验方案
Table 1. Test scheme
试验工况 喷油压力/MPa 背景压力/MPa 变喷油压力 1、3、5、7、9 0.1 变背景压力 5 0.1、0.5、1、1.5 
下载: 导出CSV
-
[1] 尚勇.基于激光诊断技术的汽油直喷发动机喷雾机理研究[R].北京: 清华大学博士后研究报告, 2016.SHANG Y.Research on the mechanism of spray in gasoline direct injection engine based on laser diagnostics[D].Beijing: Post-doctoral Research Report of Tsinghua University, 2016(in Chinese). [2] GORDON J P, ZEIGER H J, TOWNES C H.The MASER-New type of microwave amplifier, frequency standard, and spectrometer[J].Physical Review, 1955, 99(4):1264-1274. doi: 10.1103/PhysRev.99.1264 [3] MAIMAN T H.Maser behavior:Temperature and concentration effects[J].Journal of Applied Physics, 1960, 31(1):222. doi: 10.1063/1.1735412 [4] 张高明, 许敏.直喷汽油机燃烧系统开发中的喷雾激光诊断技术[J].汽车安全与节能学报, 2011, 2(4):294-307. doi: 10.3969/j.issn.1676-8484.2011.04.002ZHANG G M, XU M.Laser diagnostics for spray of spark ignition direct injection (SIDI) combustion system[J].Journal of Automotive Safety and Energy, 2011, 2(4):294-307(in Chinese). doi: 10.3969/j.issn.1676-8484.2011.04.002 [5] HIROYASU H, ARAI M.Structures of fuels sprays in diesel engines[C]//SAE International Congress and Exposition.Detroit: SAE Digital Library, 1990: 1-10. [6] JOHNSON J E, NABER J D, LEE S Y.Characterizing diesel fuel spray cone angle from back-scattered imaging by fitting Gaussian profiles to radial spray intensity distributions[J].Journal of Engineering for Gas Turbines and Power, 2012, 134(6):062802. doi: 10.1115/1.4005994 [7] KENNETH K K.Recent advanced spray combust:Spray atom drop burning phenom[M].[S.1.]:AAIA, 1996. [8] GAL P L, FARRUGIA N, GREENHALGH D A.Laser sheet drop sizing of dense sprays[J].Optical Laser Technology, 1999, 31(1):75-83. [9] 史绍熙, 苏万华, 汪洋, 等.一种测量柴油喷雾SMD分布的新方法:荧光/散射光图象处理法[J].内燃机学报, 1996, 14(2):221-228. http://www.cnki.com.cn/Article/CJFDTotal-NRJX603.000.htmSHI S X, SU W H, WANG Y, et al.A new method for measuring the SMD distribution of diesel spray:Fluorescence/scattering light image processing method[J].Transactions of CSICE, 1996, 14(2):221-228(in Chinese). http://www.cnki.com.cn/Article/CJFDTotal-NRJX603.000.htm [10] 张俊强, 小保方富夫, 志贺圣一, 等.溶有甲烷煤油的稳态喷雾特性研究[J].西安交通大学学报, 2005, 39(1):31-35. doi: 10.3321/j.issn:0253-987X.2005.01.008ZHANG J Q, OBOKATA T, SHIGA S, et al.Investigation of steady spray characteristics for kerosene containing dissolved methane[J].Journal of Xi'an Jiaotong University, 2005, 39(1):31-35(in Chinese). doi: 10.3321/j.issn:0253-987X.2005.01.008 [11] 王金华, 方宇, 黄佐华, 等.利用高速摄影纹影法研究天然气高压喷射射流特性[J].内燃机学报, 2007, 25(6):500-504. doi: 10.3321/j.issn:1000-0909.2007.06.004WANG J H, FANG Y, HUANG Z H, et al.Experimental study of the jet characteristics of high-pressure injected natural gas using high speed photograph method[J].Transactions of CSICE, 2007, 25(6):500-504(in Chinese). doi: 10.3321/j.issn:1000-0909.2007.06.004 [12] 孙柏刚, 冯旺聪, 李向荣, 等.PIV在柴油喷雾测试中的应用[J].车用发动机, 2004(1):45-50. doi: 10.3969/j.issn.1001-2222.2004.01.013SUN B G, FENG W C, LI X R, et al.Application of PIV in diesel spray measurement[J].Vehicle Engine, 2004(1):45-50(in Chinese). doi: 10.3969/j.issn.1001-2222.2004.01.013 [13] 马骁, 何旭, 王建昕.用PLIF法研究缸内直喷发动机稀燃分层与当量比分层策略[J].燃烧科学与技术, 2010, 16(4):328-334. http://d.old.wanfangdata.com.cn/Periodical/rskxyjs201004007MA X, HE X, WANG J X.In-cylinder mixture distribution research of stratified lean burn strategy and stratified stoichiometric strategy in a GDI engine using laser induced fluorescence[J].Journal of Combustion Science and Technology, 2010, 16(4):328-334(in Chinese). http://d.old.wanfangdata.com.cn/Periodical/rskxyjs201004007 [14] ZHANG M, XU M, ZENG W, et al.Characterization of methanol and ethanol sprays using mie-scattering and laser induced fluorescence under engine cold-start conditions[C]//The 13th Annual Conference on Liquid Atomization and Spray Systems-Asia, 2009: 1-9. [15] ZENG W, XU M, ZHANG Y Y, et al.Laser sheet dropsizing of evaporating sprays using simultaneous LIEF/MIE techniques[J].Proceedings of the Combustion Institute, 2012, 34(1):1677-1685. http://www.sciencedirect.com/science/article/pii/S1540748912003537 [16] 曾纬.直喷液体射流及闪急沸腾喷雾的特性及机理研究[D].上海: 上海交通大学, 2012: 16-21. http://cdmd.cnki.com.cn/Article/CDMD-10248-1013003759.htmZENG W.Characteristics of mechanisms of direct-injection liquid jet and flash-boiling spray[D].Shanghai: Shanghai Jiao Tong University, 2012: 16-21(in Chinese). http://cdmd.cnki.com.cn/Article/CDMD-10248-1013003759.htm -
下载:
点击查看大图
计量
- 文章访问数: 535
- HTML全文浏览量: 29
- PDF下载量: 148
- 被引次数: 0
