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Atomization and Sprays

年間 12 号発行

ISSN 印刷: 1044-5110

ISSN オンライン: 1936-2684

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.2 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00095 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.28 SJR: 0.341 SNIP: 0.536 CiteScore™:: 1.9 H-Index: 57

Indexed in

MORPHOLOGICAL EXPLORATION OF EMERGING JET FLOWS FROM MULTI-HOLE DIESEL INJECTORS AT DIFFERENT NEEDLE LIFTS

巻 25, 発行 5, 2015, pp. 375-396
DOI: 10.1615/AtomizSpr.2015011058
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要約

The current study takes a morphological approach to interpret the emerging jet flows from multi-hole diesel injectors. Several types of multi-hole injectors, a six-hole injector and two two-hole injectors with different needle control mechanisms, were used to investigate the emerging jet flows and related flow breakup at different needle lifts. A short X-ray pulse with 150 ps duration was used to visualize the nearfield morphologies of the emerging jet flows using an ultrafast X-ray phase-contrast imaging technique. A few X-ray pulses with 68 ns periodicity were also used to analyze the dynamics of the emerging jet flows by tracking the movement of the structures inside the spray. At first, the effects of needle lift on emerging flow pattern and breakup were investigated using a six-hole injector under practical injection conditions. A highly expanding spray was observed at the low needle lifts. The degree of flow expansion was however suppressed with an increase in the needle lift. The higher degree of flow expansion at the low needle lifts promoted the flow breakup and increased the spray deceleration rate with an increase in the axial distance. Then, a detailed morphological study of the emerging flows was performed using two-hole nozzles under low injection pressures to slow down the flow breakup in order to figure out the intrinsic nature of the emerging flows associated with the nozzle internal flow. The phase-contrast images revealed clear morphologies of several branching flows inside the spray having different flowing directions and stretching the spray three-dimensionally that originate from complex nozzle internal flow pattern. The degree of flow expansion associated with the branching flows appeared differently with the needle lift with formation of various flow structures: cone shaped, stretched thin, and cylindrical. At certain needle lifts, the branching flows sometimes formed a couple of microwavelets inside the spray having different instability frequencies, indicating different origins of each flow associated with nozzle internal flow. Increasing ambient gas density did not alter the branching characteristics of the flows significantly, while increasing injection pressure and reducing the fuel viscosity significantly altered the branching flow characteristics.

によって引用された
  1. Moon Seoksu, Novel insights into the dynamic structure of biodiesel and conventional fuel sprays from high-pressure diesel injectors, Energy, 115, 2016. Crossref

  2. Li Tianyun, Moon Seoksu, Sato Kiyotaka, Yokohata Hideaki, A comprehensive study on the factors affecting near-nozzle spray dynamics of multi-hole GDI injectors, Fuel, 190, 2017. Crossref

  3. Zhang Xusheng, Moon Seoksu, Gao Jian, Dufresne Eric M., Fezzaa Kamel, Wang Jin, Experimental study on the effect of nozzle hole-to-hole angle on the near-field spray of diesel injector using fast X-ray phase-contrast imaging, Fuel, 185, 2016. Crossref

  4. Zhang X., Liu J., Wang J., Effect of fuel and nozzle geometry on the off-axis oscillation of needle in diesel injectors using high-speed X-ray phase contrast imaging, Journal of Instrumentation, 11, 05, 2016. Crossref

  5. Komada Keisuke, Moon Seoksu, Transient needle motion of an outwardly opening GDI injector and its effects on initial spray formation, Fuel, 181, 2016. Crossref

  6. Moon Seoksu, Huang Weidi, Li Zhilong, Wang Jin, End-of-injection fuel dribble of multi-hole diesel injector: Comprehensive investigation of phenomenon and discussion on control strategy, Applied Energy, 179, 2016. Crossref

  7. Huang Weidi, Moon Seoksu, Ohsawa Katsuyuki, Near-nozzle dynamics of diesel spray under varied needle lifts and its prediction using analytical model, Fuel, 180, 2016. Crossref

  8. Moon Seoksu, Li Tianyun, Sato Kiyotaka, Yokohata Hideaki, Governing parameters and dynamics of turbulent spray atomization from modern GDI injectors, Energy, 127, 2017. Crossref

  9. Huang Weidi, Moon Seoksu, Gao Ya, Li Zhilong, Wang Jin, Eccentric needle motion effect on near-nozzle dynamics of diesel spray, Fuel, 206, 2017. Crossref

  10. Huang Weidi, Moon Seoksu, Gao Ya, Wang Jin, Ozawa Daisuke, Matsumoto Atsushi, Hole number effect on spray dynamics of multi-hole diesel nozzles: An observation from three- to nine-hole nozzles, Experimental Thermal and Fluid Science, 102, 2019. Crossref

  11. Moon Seoksu, Huang Weidi, Wang Jin, First observation and characterization of vortex flow in steel micronozzles for high-pressure diesel injection, Experimental Thermal and Fluid Science, 105, 2019. Crossref

  12. Yang Shangze, Ma Zhen, Li Xuesong, Hung David L.S., Xu Min, A review on the experimental non-intrusive investigation of fuel injector phase changing flow, Fuel, 259, 2020. Crossref

  13. Knorsch Tobias, Mamaikin Dmitrii, Leick Philippe, Rogler Philipp, Wang Jin, Li Zhilong, Wensing Michael, Comparison of Shadowgraph Imaging, Laser-Doppler Anemometry and X-Ray Imaging for the Analysis of Near Nozzle Velocities of GDI Fuel Injectors, SAE Technical Paper Series, 1, 2017. Crossref

  14. Huang Weidi, Gong Huifeng, Pratama Raditya Hendra, Moon Seoksu, Takagi Keiji, Chen Zhili, Potential for Shock-Wave Generation at Diesel Engine Conditions and Its Influence on Spray Characteristics, Energies, 13, 23, 2020. Crossref

  15. SAITO Manabu, KOMADA Keisuke, SAKAGUCHI Daisaku, UEKI Hironobu, Droplet size decrease rate of secondary breakup in diesel fuel sprays, Journal of Thermal Science and Technology, 16, 2, 2021. Crossref

  16. Jin Tianyu, Sun Yu, Wang Chuqiao, Moro Adams, Wu Xiwen, Luo Fuqiang, The Influence of Needle Eccentric Motion on Hole-to-Hole Injection Characteristics of a Two-Layered Eight-Hole Diesel Injector, Journal of Engineering for Gas Turbines and Power, 143, 10, 2021. Crossref

  17. Bae Gyuhan, Choi Sungsik, Lee Sanggwon, Moon Seoksu, Wang Jin, Kim Kihyun, Lee Jinwoo, Kang Jinsuk, Experimental investigation of fuel temperature effects on transient needle motion and injection velocity of solenoid type diesel injector, International Journal of Heat and Mass Transfer, 181, 2021. Crossref

  18. Mamaikin Dmitrii, Knorsch Tobias, Rogler Philipp, Wang Jin, Wensing Michael, The effect of transient needle lift on the internal flow and near-nozzle spray characteristics for modern GDI systems investigated by high-speed X-ray imaging, International Journal of Engine Research, 23, 2, 2022. Crossref

  19. Zhang Xusheng, Wei Lijiang, Yao Li, Zhong Jingjun, Wang Jin, Investigation of near-field jet stability of a single-hole injector based on fast X-ray phase contrast imaging and image feature matching, Experimental Thermal and Fluid Science, 2022. Crossref

  20. Gao Ya, Huang Weidi, Pratama Raditya Hendra, Gong Huifeng, Wang Jin, Investigation of Needle Motion Profile Effect on Diesel Spray in Near-Nozzle Field, Micromachines, 13, 11, 2022. Crossref

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