Ball Motion and Near-Field Spray Characteristics of a Gasoline Direct Injection Injector using an X-ray Phase-Contrast Imaging Technique under High-Injection Pressures

Chang, Mengzhao; Kim, Hyung Ik; Park, Jeong Hwan; Wang, Jin; Park, Suhan

doi:10.1016/j.ijheatmasstransfer.2020.120725

Ball Motion and Near-Field Spray Characteristics of a Gasoline Direct Injection Injector using an X-ray Phase-Contrast Imaging Technique under High-Injection Pressures

Journal Article · Wed Dec 02 23:00:00 EST 2020 · International Journal of Heat and Mass Transfer

DOI:https://doi.org/10.1016/j.ijheatmasstransfer.2020.120725· OSTI ID:1864348

Chang, Mengzhao ^[1]; Kim, Hyung Ik ^[2]; Park, Jeong Hwan ^[2]; Wang, Jin ^[3]; ^[1]

Chonnam National Univ., Gwangju (Korea, Republic of)
Hyundai-Kefico, Gunpo-si (Korea, Republic of)
Argonne National Lab. (ANL), Argonne, IL (United States)

Here, the purpose of this study is to visualize the ball (needle) motion and near-field spray characteristics of a gasoline direct injection injector under different injection conditions and analyze the effect of the internal structure of the injector on the ball motion, near-field spray velocity, and post-injection process. The injection pressure is set to 10MPa, 20 MPa, and 30 MPa, and the energization duration is fixed at 1.5 ms. An advanced X-ray technique with high transmittance and low scattering, is used to visualize the internal structure and near-field spray characteristics of the injector, which is impossible with general light sources. The ball is found to tilt to the right in the Y-axial direction during stable motion because the driving force of fuel on the ball is larger on the left side owing to the larger distance of the ball from the left wall. In addition, during stable motion, the near-field velocity of a hole with a smaller inlet angle is significantly higher than that of a hole with a larger inlet angle. The hole with a smaller inlet angle display better atomization characteristics during the post-injection process under all values of injection pressure.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Research Foundation (NRF) of Korea; Center for Environmentally Friendly Vehicle (CEFV); Ministry of Environment, Korea

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1864348

Journal Information:: International Journal of Heat and Mass Transfer, Journal Name: International Journal of Heat and Mass Transfer Vol. 166; ISSN 0017-9310

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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X-ray phase-contrast imaging
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Ball Motion and Near-Field Spray Characteristics of a Gasoline Direct Injection Injector using an X-ray Phase-Contrast Imaging Technique under High-Injection Pressures

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