کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
656533 1458050 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical study on heat transfer in a conical fluidized bed combustor considering particle elasticity
ترجمه فارسی عنوان
مطالعه عددی انتقال حرارت در یک سوزن کوره سیلندر مخروطی با توجه به الاستیسیته ذرات
کلمات کلیدی
ضرایب بازپرداخت، دینامیک سیالات محاسباتی، مشعل تخت کوره مایع ضریب انتقال حرارت، هیدرودینامیک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی


• Numerical simulations of conical fluidized bed combustors were carried out.
• The effect of restitution coefficient was investigated.
• Increasing the particle-to-particle coefficient increased the bed pressure drop.
• Increasing the particle-to-wall coefficient decreased the bed pressure drop.
• The particle-to-wall coefficient of restitution had little effect on heat transfer.

Numerical simulations of conical fluidized bed combustors were carried out to estimate the effect of collision elasticity, parameterized by the particle-to-particle and particle-to-wall coefficients of restitution, upon the combustor’s hydrodynamics and heat transfer. The Eulerian–Eulerian two-fluid model was used to simulate the hydrodynamics and heat transfer in the combustor, and solid phase properties were calculated by applying the kinetic theory of granular flow (KTGF). Sand of size 560 μμm was used as a bed material and air was used as a fluidized gas, introduced at the velocity of 3 m/s at the combustor inlet. In the simulations, increasing the particle-to-particle restitution coefficient increased the bed pressure drop and caused significant changes to other hydrodynamics parameters. Oppositely increasing the particle-to-wall coefficient of restitution decreased the bed pressure drop. Changes to either the coefficients studied had little effect on heat transfer.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 92, January 2016, Pages 236–243
نویسندگان
, , , , ,