Preliminary study on compressible gas-liquid two-phase flow computation for ultra-high-pressure fuel injection process
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- SUMI Takahiro
- Faculty of Science and Engineering, Saga University
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- KUROTAKI Takuji
- Aeronautical Technology Directorate, Japan Aerospace Exploration Agency
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- OHSAWA Katsuyuki
- Faculty of Engineering, Tottori University
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- ODA Tetsuya
- Faculty of Engineering, Tottori University
Bibliographic Information
- Other Title
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- 超高圧燃料噴射過程の圧縮性気液二相流計算に関する初期検討
Abstract
<p>To obtain qualitative knowledges about an ultra-high-pressure fuel injection process in a future automobile diesel injector, a compressible gas-liquid two-phase flow solver is newly developed and an unsteady numerical analysis on a simple injection system with a two-dimensional micro-hole is performed. The six-equation diffuse interface model with heat and mass transfer is adopted and extended from the original two-phase two-component system to the new two-phase multi-component system. High-order numerical discretization methods in time and space are employed to resolve fine flow structures in the transient injection process. In the numerical results, injection pressure in the high-pressure chamber and back pressure in the low-pressure chamber are systematically changed, and the effects on the injection process are discussed in detail. Under conditions close to real operation, promotion of primary atomization due to jet instability, formation of a detached shock wave at the tip of the fuel jet and generation of cavitation bubbles inside the hole are clearly observed. Moreover, compressible effects in both gas and liquid phases are confirmed to be crucial in the numerical analysis of the ultra-high-pressure fuel injection process, which integrally handles the whole system from the high-pressure section to the low-pressure section.</p>
Journal
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- Transactions of the JSME (in Japanese)
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Transactions of the JSME (in Japanese) 85 (872), 18-00332-18-00332, 2019
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390845713063778304
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- NII Article ID
- 130007637248
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- ISSN
- 21879761
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed