功能材料
功能材料
공능재료
JOURNAL OF FUNCTIONAL MATERIALS
2015年
z1期
146-151
,共6页
RMV%“三箱”模型%CaSiO 3 多孔介质%导热系数
RMV%“三箱”模型%CaSiO 3 多孔介質%導熱繫數
RMV%“삼상”모형%CaSiO 3 다공개질%도열계수
RMV%“three boxes”model%CaSiO3 porous media%thermal conductivity
基于粗宏观表征体元 RMV,建立了 CaSiO 3多孔介质“三箱”模型,即：黑箱模型、灰箱模型和白箱模型.推导了“三箱”传热物理模型下,导热系数计算的数学模型.数值计算了101．325 kPa、400 K 的过热水蒸气在 CaSiO 3粗宏观表征体元中传递时的导热系数.数值模拟了孔隙率为30％和70％的 CaSiO 3灰箱传热模型温度场分布.结果表明,导热系数随孔隙率增大而减小,导热系数随孔隙通道分布系数和迂曲度增大而增大.研究结果对 CaSiO 3多孔介质及其它功能材料多孔介质热质传递机理研究具有重要的理论价值和工程应用意义.
基于粗宏觀錶徵體元 RMV,建立瞭 CaSiO 3多孔介質“三箱”模型,即：黑箱模型、灰箱模型和白箱模型.推導瞭“三箱”傳熱物理模型下,導熱繫數計算的數學模型.數值計算瞭101．325 kPa、400 K 的過熱水蒸氣在 CaSiO 3粗宏觀錶徵體元中傳遞時的導熱繫數.數值模擬瞭孔隙率為30％和70％的 CaSiO 3灰箱傳熱模型溫度場分佈.結果錶明,導熱繫數隨孔隙率增大而減小,導熱繫數隨孔隙通道分佈繫數和迂麯度增大而增大.研究結果對 CaSiO 3多孔介質及其它功能材料多孔介質熱質傳遞機理研究具有重要的理論價值和工程應用意義.
기우조굉관표정체원 RMV,건립료 CaSiO 3다공개질“삼상”모형,즉：흑상모형、회상모형화백상모형.추도료“삼상”전열물리모형하,도열계수계산적수학모형.수치계산료101．325 kPa、400 K 적과열수증기재 CaSiO 3조굉관표정체원중전체시적도열계수.수치모의료공극솔위30％화70％적 CaSiO 3회상전열모형온도장분포.결과표명,도열계수수공극솔증대이감소,도열계수수공극통도분포계수화우곡도증대이증대.연구결과대 CaSiO 3다공개질급기타공능재료다공개질열질전체궤리연구구유중요적이론개치화공정응용의의.
Based on representative macroscopic volume,this study established “three boxes”model of CaSiO 3 porous media,namely:black box model,gray box model and white box model.Deriving mathematical models to calculate thermal conductivity under the “three boxes”heat physical models.At the same time,the thermal conductivity which overheating H 2 O(g)in the state of 101.325 kPa and 400 K transfers CaSiO 3 representative macroscopic volume was calculated.What’s more,the temperature distribution of CaSiO 3 gray box heat trans-fer model was simulated when the porosity was 30% and 70%.The finding of this paper indicates that thermal conductivity decreases with increasing porosity,thermal conductivity increases with increasing pore channels distribution coefficient and tortuosity.The research results have important theory value and engineering applica-tion value for CaSiO 3 porous media and other inorganic materials porous media in heat and mass transferring.
