کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1702703 1519399 2016 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of coflows on a turbulent jet impacting on a plate
ترجمه فارسی عنوان
اثر جریان مشترک بر روی یک جت آشفته تأثیرگذار بر روی یک صفحه
کلمات کلیدی
جت آشفته؛ PIV؛ مدلهای اغتشاش؛ جریان Coflow؛ نسبت سرعت؛ زاویه انحراف
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
چکیده انگلیسی


• Study of a turbulent plane jet impinging on a flat surface.
• Comparison between numerical results and experimental data.
• Study of the flow field of an impinging jet in a coflow stream.

The study examines the dynamic and the turbulent behavior of a plane jet impinging normally on a flat target plate in a flow at rest or in a coflow stream. First, numerical and experimental investigations of the characteristics of a turbulent plane jet impinging on a flat surface in still air are depicted. The measurements are conducted using Particle Image Velocimetry (PIV). A comparison has been carried out between numerical results of three turbulence closure models (k–ε standard model, RNG k–ε model and a second-order model RSM) and experimental data. It has been found that the second order turbulence model (RSM) reasonably predicts the mean flow properties of the flow field. Next, a numerical study of the flow field of an impinging jet in a coflow stream is conducted. The study of the jet in a no-directed coflow stream shows the presence of a phenomenon of recirculation near the flat plate. In addition, the study focuses on the influence of the coflow velocity ratio on the behavior of an impinging jet and the influence of the directed co-flow on various physical parameters such as the mean and the turbulent quantities. The results clearly show that the coflow stream imposed noticeable restrictions on the spreading of the impinging jet and decreases considerably the entrainment of air jet.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Mathematical Modelling - Volume 40, Issues 11–12, June 2016, Pages 5942–5963
نویسندگان
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