کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1798278 | 1524816 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical simulation and performance improvement of a multi-polar concentric Halbach cylindrical magnet for magnetic refrigeration
ترجمه فارسی عنوان
شبیه سازی عددی و بهبود عملکرد مغناطیسی استوانه ای چندبلوک غلظت هالابچ برای تبرید مغناطیسی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
چکیده انگلیسی
Multi-polar concentric Halbach cylinders of magnets could generate the magnetic field varying considerably in the annular gaps, thus were applied in the rotary magnetic refrigerators. In the current investigation, a six-polar concentric Halbach cylinder is developed based on the ideal concentric one by the numerical simulation with COMSOL Multiphysics. Cylinder radii are optimized and magnet material profiles are adjusted for a better overall performance (Îcool). Moreover, the segmentation on the concentric cylinder is conducted for an easy fabrication, and the edge effect of finite-length device is studied. With the present investigation, it is found that a larger external radius of external cylinder facilitates a larger flux density in the high field region (|B|¯high), while Îcool could be worse. Meanwhile, with the removal of magnet materials enclosed by the equipotential lines of magnetic vector potential, the magnetic flux density in low field region (|B|¯low) drops from 0.271 to 0.0136 T, and Îcool rises from 1.36 to 1.85 T0.7. Moreover, a proper segmentation would not degrade the difference between |B|¯high and |B|¯low, on the contrary, Îcool rises by about 20.2% due to magnet materials lack for efficiency replaced by soft irons. Finally, current 3D simulation indicates the edge effect on Îcool could be trivial.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 405, 1 May 2016, Pages 231-237
Journal: Journal of Magnetism and Magnetic Materials - Volume 405, 1 May 2016, Pages 231-237
نویسندگان
Yonghua You, Yue Guo, Shuifang Xiao, Shen Yu, Hu Ji, Xiaobing Luo,