کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1508071 993949 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical analysis on pressure drop and heat transfer performance of mesh regenerators used in cryocoolers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Numerical analysis on pressure drop and heat transfer performance of mesh regenerators used in cryocoolers
چکیده انگلیسی

An anisotropic porous media model for mesh regenerator used in pulse tube refrigerator (PTR) is established. Formulas for permeability and Forchheimer coefficient are derived which include the effects of regenerator configuration and geometric parameters, oscillating flow, operating frequency, cryogenic temperature. Then, the fluid flow and heat transfer performances of mesh regenerator are numerically investigated under different mesh geometric parameters and material properties. The results indicate that the cooling power of the PTR increases with the increases of specific heat capacity and density of the regenerator mesh material, and decreases with the increases of penetration depth and thermal conductivity ratio (a). The cooling power at a = 0.1 is 0.5–2.0 W higher than that at a = 1. Optimizing the filling scale of different mesh configurations (such as 75% #200 twill and 25% #250 twill) and adopting multi segments regenerator with stainless steel meshes at the cold end can enhance the regenerator’s efficiency and achieve better heat transfer performance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cryogenics - Volume 49, Issue 9, September 2009, Pages 497–503
نویسندگان
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