物理学报
物理學報
물이학보
2015年
8期
084401-1-084401-5
,共1页
定向传热%超材料%红外隐身
定嚮傳熱%超材料%紅外隱身
정향전열%초재료%홍외은신
directional heat transmission%metamaterials%infrared stealth
在热斗篷研究的基础上，提出定向传热结构的研究。基于变换热力学，采用坐标斜变换推导了定向传热结构热导率分布的表达式。数值计算结果表明，外部热流流经定向传热区域时，热流向设计的高温面流动，而设计的低温面温度较低。此外，在导出的热导率分布表达式的基础上，进一步进行坐标旋转变换，得到的热导率表达式只有相互垂直的两个分量。计算结果表明，沿高温面法向的热导率增大时，传热效率提高，而且经过坐标旋转变换后，高温面与低温面的温差增大。定向传热在红外隐身、热防护领域具有潜在的应用价值。
在熱鬥篷研究的基礎上，提齣定嚮傳熱結構的研究。基于變換熱力學，採用坐標斜變換推導瞭定嚮傳熱結構熱導率分佈的錶達式。數值計算結果錶明，外部熱流流經定嚮傳熱區域時，熱流嚮設計的高溫麵流動，而設計的低溫麵溫度較低。此外，在導齣的熱導率分佈錶達式的基礎上，進一步進行坐標鏇轉變換，得到的熱導率錶達式隻有相互垂直的兩箇分量。計算結果錶明，沿高溫麵法嚮的熱導率增大時，傳熱效率提高，而且經過坐標鏇轉變換後，高溫麵與低溫麵的溫差增大。定嚮傳熱在紅外隱身、熱防護領域具有潛在的應用價值。
재열두봉연구적기출상，제출정향전열결구적연구。기우변환열역학，채용좌표사변환추도료정향전열결구열도솔분포적표체식。수치계산결과표명，외부열류류경정향전열구역시，열류향설계적고온면류동，이설계적저온면온도교저。차외，재도출적열도솔분포표체식적기출상，진일보진행좌표선전변환，득도적열도솔표체식지유상호수직적량개분량。계산결과표명，연고온면법향적열도솔증대시，전열효솔제고，이차경과좌표선전변환후，고온면여저온면적온차증대。정향전열재홍외은신、열방호영역구유잠재적응용개치。
Based on the research of thermal cloak, directional heat transmission structure is proposed in this paper. On the basis of transformation thermodynamics, the thermal conductivity expression for directional heat transmission structure is derived by the oblique coordinate transformation. The results from the numeric calculation indicate that the heat flux flows to the designed high temperature side while the low temperature side remains at low temperature. Further-more, rotational transformation is performed on the basis of oblique coordinate transformation. The derived thermal conductivity expression has two vertical segments. The calculation results display that with the increase of the thermal conductivity along the normal of the high temperature side, the heat transmission e?ciency is improved greatly. More-over, the temperature difference between the high and low temperature side increases after the rotational transformation. Directional heat transmission has potential applications in infrared stealth and heat protection.
