喷孔锥度和燃油温度对柴油喷嘴内空化流动特性的影响

郭根苗; 白天阳; 邵壮; 李琛; 何志霞

doi:10.7652/xjtuxb202208014

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喷孔锥度和燃油温度对柴油喷嘴内空化流动特性的影响

—————————————————————— | 更新时间：2025-07-09

- 喷孔锥度和燃油温度对柴油喷嘴内空化流动特性的影响
- Effects of Hole Taper Coefficients and Diesel Temperatures on In-Nozzle Cavitation
- 西安交通大学学报 2022年56卷第8期页码：131-140
- 作者机构：
  
  1. 江苏大学能源研究院,江苏,镇江,212013
  2. 江苏大学能源与动力工程学院,江苏,镇江,212013
  3. 山东中科先进技术研究院,济南,250000
- 作者简介：
  
  : 2022-01-25。作者简介: 郭根苗(1989—),女,讲师
  何志霞(通信作者),女,教授。基金项目: 国家自然科学基金资助项目(52106153)
- 基金信息：
  
  : 2022-01-25。作者简介: 郭根苗(1989—),女,讲师;何志霞(通信作者),女,教授。基金项目: 国家自然科学基金资助项目(52106153);江苏省自然科学基金资助项目(BK20210760);中国博士后科学基金特别资助项目(2020TQ0126)
- DOI：10.7652/xjtuxb202208014
  中图分类号： TK421.4
- 网络首发：2022-08-10，
  
  纸质出版：2022
- 稿件说明：
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郭根苗, 白天阳, 邵壮, 等. 喷孔锥度和燃油温度对柴油喷嘴内空化流动特性的影响[J]. 西安交通大学学报, 2022,56(8):131-140.

GUO Genmiao, BAI Tianyang, SHAO Zhuang, et al. Effects of Hole Taper Coefficients and Diesel Temperatures on In-Nozzle Cavitation[J]. 2022, 56(8): 131-140.
郭根苗, 白天阳, 邵壮, 等. 喷孔锥度和燃油温度对柴油喷嘴内空化流动特性的影响[J]. 西安交通大学学报, 2022,56(8):131-140. DOI： 10.7652/xjtuxb202208014.

GUO Genmiao, BAI Tianyang, SHAO Zhuang, et al. Effects of Hole Taper Coefficients and Diesel Temperatures on In-Nozzle Cavitation[J]. 2022, 56(8): 131-140. DOI： 10.7652/xjtuxb202208014.

摘要

为弄清喷孔锥度和燃油温度对柴油喷嘴内空化流动特性的影响

阐明喷嘴内气液两相空化流动初生机制

采用背景光高速显微成像技术获得不同锥度系数及燃油温度下简化竖直单孔柴油喷嘴内空化流动及近场喷雾光学图像。结果表明:随着喷射压力增大(0.2～1.0 MPa)

柴油喷嘴内燃油逐步从单相流动发展为片空化、线空化、空气倒吸和超空化等多种气液两相空化流态; 云空化、线空化和空气倒吸现象的初生强烈依赖于燃油喷射压力

且具有显著的瞬态不稳定性。与圆柱形喷孔相比

渐缩锥度喷孔对各类空化流态具有明显的抑制作用

且锥度系数越大

抑制作用越显著。同时

提高燃油温度(288 K、303 K和323 K)有利于各类空化流态的初生及发展。此外

喷孔内部空化两相流动加剧了燃油射流的不稳定性

促进了射流破碎雾化

有利于增大喷雾锥角。研究为揭示各空化流态特性及其对喷雾特性的影响规律奠定了理论基础。

Abstract

This study focuses on the effects of hole taper coefficients and diesel temperatures on the in-nozzle flow regimes

and reveals the cavitation inception mechanism. A self-circulating visualized system for the cavitation and near-field spray patterns was set up with a high-speed camera and a macro lens for the simplified vertical plain nozzles. The results show that the in-nozzle diesel flow will change from the single-phase flow to gas-liquid two-phase cavitating flow including the sheet cavitation

cloud cavitation

string cavitation

air suction and super cavitation with the increase of injection pressure(from 0.2 to 1.0 MPa). As the inception of cloud cavitation

string cavitation and air suction heavily depends on the diesel injection pressure and shows significant transient instability. Compared with cylindrical nozzles

tapered nozzles strongly suppress the inception and development of various cavitation regimes

and a greater taper coefficient means stronger suppression. Additionally

improving the diesel temperature(288

303 and 323 K)is beneficial to the inception and development of the cavitation regimes. Moreover

the inner two-phase cavitation flow worsens the fuel jet turbulence and increases the spray cone angle

eventually promoting the jet atomization. The study provides a theoretical basis for revealing the characteristics of cavitation flow patterns and their influence on spray characteristics.

关键词

Keywords

references

DUAN Xiongbo, LAI M C, JANSONS M, et al. A review of controlling strategies of the ignition timing and combustion phase in homogeneous charge compression ignition(HCCI)engine [J]. Fuel, 2021, 285: 119142.

KRISHNAMOORTHI M, MALAYALAMURTHI R, HE Zhixia, et al. A review on low temperature combustion engines: performance, combustion and emission characteristics [J]. Renewable and Sustainable Energy Reviews, 2019, 116: 109404.

赵玉伟, 汪映, 雷雄, 等. 预混均质充量压缩燃烧发动机燃烧与排放特性 [J]. 西安交通大学学报, 2014, 48(7): 23-28.

ZHAO Yuwei, WANG Ying, LEI Xiong, et al. Combustion and emission characteristics of premixed charge compression ignition engine [J]. Journal of Xi'an Jiaotong University, 2014, 48(7): 23-28.

陈伟泽, 张尊华, 龙焱祥, 等. 燃烧室结构与喷油策略对天然气-柴油反应活性控制压燃发动机的影响研究 [J]. 内燃机工程, 2022, 43(1): 39-47.

CHEN Weize, ZHANG Zunhua, LONG Yanxiang, et al. Effects of piston bowl geometry and injection strategy on natural gas-diesel reactivity controlled compression ignition engine [J]. Chinese Internal Combustion Engine Engineering, 2022, 43(1): 39-47.

BALZ R, VON ROTZ B, SEDARSKY D. In-nozzle flow and spray characteristics of large two-stroke marine diesel fuel injectors [J]. Applied Thermal Engineering, 2020, 180: 115809.

麻斌, 高莹, 刘宇, 等. 相间滑移对喷油器喷孔内空化现象数值模拟研究的影响 [J]. 西安交通大学学报, 2017, 51(1): 59-64, 78.

MA Bin, GAO Ying, LIU Yu, et al. Effects of slip velocity on the modeling of cavitation phenomenon in injector nozzle [J]. Journal of Xi'an Jiaotong University, 2017, 51(1): 59-64, 78.

BAO Hesheng, MAES N, AKARGUN H Y, et al. Large eddy simulation of cavitation effects on reacting spray flames using FGM and a new dispersion model with multiple realizations [J]. Combustion and Flame, 2022, 236: 111764.

郑直, 赵鹏坤, 闵为, 等. 液压阀口空气型空化周期特性的实验研究 [J]. 西安交通大学学报, 2019, 53(10): 72-78, 150.

ZHENG Zhi, ZHAO Pengkun, MIN Wei, et al. An experimental investigation on periodic characteristics of gaseous cavitating flow in hydraulic valve orifices [J]. Journal of Xi'an Jiaotong University, 2019, 53(10): 72-78, 150.

GUO Genmiao, HE Zhixia, WANG Qian, et al. Numerical investigation of transient hole-to-hole variation in cavitation regimes inside a multi-hole diesel nozzle [J]. Fuel, 2021, 287: 119457.

GUO Genmiao, HE Zhixia, JIN Yu, et al. Visualization investigations of flow regimes in different sizes of diesel injector nozzles and their effects on spray [J]. Atomization and Sprays, 2018, 28(6): 547-563.

PAYRI R, SALVADOR F J, GIMENO J, et al. Study of cavitation phenomenon using different fuels in a transparent nozzle by hydraulic characterization and visualization [J]. Experimental Thermal and Fluid Science, 2013, 44: 235-244.

韩桂华, 洪健, 侯进军, 等. 孔板通道结构参数对空化效应的影响 [J]. 哈尔滨理工大学学报, 2022, 27(1): 108-114.

HAN Guihua, HONG Jian, HOU Jinjun, et al. Influence of orifice channel structure parameters on cavitation effect [J]. Journal of Harbin University of Science and Technology, 2022, 27(1): 108-114.

CUI Jiwen, LAI Houhu, FENG Kunpeng, et al. Quantitative analysis of the minor deviations in nozzle internal geometry effect on the cavitating flow [J]. Experimental Thermal and Fluid Science, 2018, 94: 89-98.

MOON S, HUANG Weidi, WANG Jin. Spray formation mechanism of diverging-tapered-hole GDI injector and its potentials for GDI engine applications [J]. Fuel, 2020, 270: 117519.

LENIK L, KEGL B, BOMBEK G, et al. The influence of in-nozzle cavitation on flow characteristics and spray break-up [J]. Fuel, 2018, 222: 550-560.

CHEN Zhou, HE Zhixia, SHANG Weiwei, et al. Experimental study on the effect of nozzle geometry on string cavitation in real-size optical diesel nozzles and spray characteristics [J]. Fuel, 2018, 232: 562-571.

CAI Tengfei, LIU Boshen, MA Fei, et al. Influence of nozzle lip geometry on the Strouhal number of self-excited waterjet [J]. Experimental Thermal and Fluid Science, 2020, 112: 109978.

高永强, 魏明锐, 颜伏伍, 等. 喷孔几何特征对孔内流动及近孔区域燃油雾化的影响 [J]. 农业机械学报, 2016, 47(12): 347-353.

GAO Yongqiang, WEI Mingrui, YAN Fuwu, et al. Influence of nozzle geometry on internal flow characteristics of injection nozzle and near nozzle region injection and atomization [J]. Transactions of the Chinese Society for Agricultural Machinery, 2016, 47(12): 347-353.

HOSBACH M, GITAU S, SANDER T, et al. Effect of taper, pressure and temperature on cavitation extent and dynamics in micro-channels [J]. Experimental Thermal and Fluid Science, 2019, 108: 25-38.

DAI Xiaoyu, WANG Ziman, LIU Fushui, et al. The effect of nozzle structure and initial state on the primary breakup of diesel spray [J]. Fuel, 2020, 280: 118640.

RANE Y S, MARSTON J O. Computational study of fluid flow in tapered orifices for needle-free injectors [J]. Journal of Controlled Release, 2020, 319: 382-396.

钟汶君, 何志霞, 王谦, 等. 不同燃油温度喷嘴内部流动可视化试验 [J]. 内燃机学报, 2015, 33(3): 238-242.

ZHONG Wenjun, HE Zhixia, WANG Qian, et al. Visualization of cavitating flow in diesel nozzles at different fuel temperatures [J]. Transactions of CSICE, 2015, 33(3): 238-242.

ZHANG Xin, HE Zhixia, WANG Qian, et al. Effect of fuel temperature on cavitation flow inside vertical multi-hole nozzles and spray characteristics with different nozzle geometries [J]. Experimental Thermal and Fluid Science, 2018, 91: 374-387.

高莹, 邓海鹏, 麻斌, 等. 喷孔长度和喷油体温度对乙醇柴油空化及近场喷雾的影响 [J]. 工程热物理学报, 2020, 41(5): 1261-1269.

GAO Ying, DENG Haipeng, MA Bin, et al. Effect of orifice lengths and injector temperatures on cavitating characteristics and near-field spraying based on ethanol-diesel [J]. Journal of Engineering Thermophysics, 2020, 41(5): 1261-1269.

王军, 金毅, 张幽彤. 高压共轨系统中的燃油温度变化及其影响 [J]. 内燃机工程, 2018, 39(3): 16-22.

WANG Jun, JIN Yi, ZHANG Youtong. Fuel temperature change and its effect on high pressure common rail system [J]. Chinese Internal Combustion Engine Engineering, 2018, 39(3): 16-22.

SUN Yubiao, GUAN Zhiqiang, HOOMAN K. Cavitation in diesel fuel injector nozzles and its influence on atomization and spray [J]. Chemical Engineering Technology, 2019, 42(1): 6-29.

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