年間 12 号発行
ISSN 印刷: 1044-5110
ISSN オンライン: 1936-2684
Indexed in
A STUDY OF THE FLOW AND ATOMIZATION CHARACTERISTICS OF IMPINGED DIESEL SPRAY ON A CHAMBER WALL
要約
The purpose of this study was to investigate the flow and atomization characteristics of an impinged spray on the wall of a chamber with a high-speed diesel spray injected from a common-rail system under various experimental conditions. The flow characteristics of the impinged spray were visualized and the droplet velocity distributions were obtained using a particle image velocimetry (PIV) system. The atomization characteristics of an impinged spray on the wall were investigated in terms of mean droplet size and radial mean velocity at various injection and wall parameters such as injection pressure, ambient pressure, the nozzle-wall distance, and the inclined angle of the wall. Additionally, the velocity distributions from the PIV system were compared with the measured results of the phase Doppler particle analyzer (PDPA) system. It is revealed that the radial spray penetration and the flow field on the impinged wall increase with the increase of the injection pressure and inclined angle of the wall. Comparison results of radial velocity on the impinged spray between PIV and PDPA show that the maximum value of radial velocity is similar. The distributions of SMDs under various experimental conditions show that atomization characteristics are affected by high-momentum droplets. The increases of injection pressure and nozzle-wall distance cause the decrease of droplet diameter, and measured droplet diameters are mostly under 25 μm.
-
Ghaemi Sina, Rahimi Payam, Nobes David S., Evaluation of StereoPIV Measurement of Droplet Velocity in an Effervescent Spray, International Journal of Spray and Combustion Dynamics, 2, 2, 2010. Crossref
-
Jia Ming, Peng Zhijun, Xie Maozhao, Stobart Richard, Evaluation of Spray/Wall Interaction Models under the Conditions Related to Diesel HCCI Engines, SAE International Journal of Fuels and Lubricants, 1, 1, 2008. Crossref
-
Du Wei, Zhang Qiankun, Zhang Zheng, Lou Juejue, Bao Wenhua, Effects of injection pressure on ignition and combustion characteristics of impinging diesel spray, Applied Energy, 226, 2018. Crossref
-
Du Wei, Zhang Qiankun, Bao Wenhua, Lou Juejue, Effects of injection pressure on spray structure after wall impingement, Applied Thermal Engineering, 129, 2018. Crossref
-
Li Yaozong, Li Xiangrong, Cao Weiren, Shi Zhicheng, Bo Yaqing, Wu Han, Acting mechanism of low ambient temperature on wall-impinging diesel spray ignition at an extensive range, Fuel, 304, 2021. Crossref
-
Steinberg Christoph, Hung David L. S., Transient mapping of high-pressure impinging spray boundary contour on stepped geometries, Journal of Visualization, 23, 6, 2020. Crossref
-
Bo Yaqing, Wu Han, Hernández Juan J., Shi Zhicheng, Cao Weiren, Li Xiangrong, Numerical study of wall-impinging ignition at different wall distances for cold start of heavy-duty diesel engine, Applied Thermal Engineering, 212, 2022. Crossref
-
Wu Han, Sun Long, Shi Zhicheng, Li Haiying, Zhang Lu, Bo Yaqing, Cao Weiren, Li Xiangrong, Effect of wall parameters on impinging combustion and soot emission characteristics of heavy-duty diesel engine at low temperature, Chemosphere, 306, 2022. Crossref
-
Steinberg Christoph, Liu Menqgi, Hung David L.S., A combined experimental–numerical study towards the elucidation of spray–wall interaction on step geometries, Engineering Applications of Computational Fluid Mechanics, 16, 1, 2022. Crossref