建筑节能
建築節能
건축절능
CONSTRUCTION CONSERVES ENERGY
2015年
1期
13-17
,共5页
匡东升%陈宝明%刘芳%蔡鹏飞%戴振宇%邱伟国
劻東升%陳寶明%劉芳%蔡鵬飛%戴振宇%邱偉國
광동승%진보명%류방%채붕비%대진우%구위국
封闭方腔%自然对流%数值模拟%倾斜角
封閉方腔%自然對流%數值模擬%傾斜角
봉폐방강%자연대류%수치모의%경사각
closed square cavity%natural convection%numerical simulation%inclined angle
利用一区域数学模型，采用有限元法对二维倾斜封闭方腔内自然对流换热现象进行了研究。通过数值模拟得到了倾斜封闭方腔内的流场、温度场、高温壁面局部Nusselt数和平均Nusselt数，着重分析倾斜角θ和Ra数对封闭方腔内自然对流换热的影响。再根据数值模拟结果获得对自然对流换热产生积极影响的最佳倾斜角度θ和Ra数。
利用一區域數學模型，採用有限元法對二維傾斜封閉方腔內自然對流換熱現象進行瞭研究。通過數值模擬得到瞭傾斜封閉方腔內的流場、溫度場、高溫壁麵跼部Nusselt數和平均Nusselt數，著重分析傾斜角θ和Ra數對封閉方腔內自然對流換熱的影響。再根據數值模擬結果穫得對自然對流換熱產生積極影響的最佳傾斜角度θ和Ra數。
이용일구역수학모형，채용유한원법대이유경사봉폐방강내자연대류환열현상진행료연구。통과수치모의득도료경사봉폐방강내적류장、온도장、고온벽면국부Nusselt수화평균Nusselt수，착중분석경사각θ화Ra수대봉폐방강내자연대류환열적영향。재근거수치모의결과획득대자연대류환열산생적겁영향적최가경사각도θ화Ra수。
The phenomena of natural convection heat transfer in two-dimensional inclined closed square cavity is studied by using finite element method and one - dimensional mathematic model. It is ob-tained the flow field, temperature field, high temperature of wall local Nusselt number and average Nusselt number by numerical simulation. It analyzes the influence of inclination angle and the Rayleigh number on the natural convection heat transfer in an inclined closed square cavity. According to the results of the nu-merical simulation, the best inclined angle and Rayleigh number to have a positive impact on the natural convection heat transfer is obtained.
