کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11007328 1521075 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Damping effect on impact pressure from liquid droplet impingement on wet wall
ترجمه فارسی عنوان
اثر ماندگاری بر فشار اثر از ضربه مایع قطره بر روی دیوار مرطوب
کلمات کلیدی
ریزش دیوار، مایع قطره قطره، فرسایش، فشار ضربه، دیوار مرطوب اثر مضر،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Damping of the impact pressure from liquid droplet impingement (LDI) on a wet wall was studied by numerical simulation and experiment. The numerical simulation was carried out for the impact of an axisymmetric spherical droplet on a wet wall using a compressible form of the Euler equations combined with the stiffened gas equation. The impact pressures on the wall were highly damped by the influence of the liquid film prevailing over the wet wall, and the damping effect was formulated as a function of the liquid-film thickness to droplet diameter. The physical mechanism of the liquid-film damping effect is due to the two-stage compression during LDI and its weakening by the diffraction of the shock wave propagated in the liquid film. In order to understand the liquid-film damping effect obtained from the numerical simulation, experiments on LDI erosion on a wet wall were carried out for various liquid temperatures, which generated a thinner liquid film on the wall at higher temperatures by the viscous effect. The experimental results indicated that the LDI erosion rate increased with rising liquid temperatures, which corresponds to the erosion-rate growth at thinner liquid-film thicknesses. This result is consistent with the liquid-film damping effect obtained from the numerical simulation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Annals of Nuclear Energy - Volume 121, November 2018, Pages 260-268
نویسندگان
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