natural heat convection 中文意思是什麼

natural heat convection 解釋
自然對粱熱
  • natural : adj 1 自然界的；關于自然界的。2 天然的；未開墾的；野生的。3 固有的 生來的 天賦的（opp acquired）...
  • heat : n 1 熱；熱力；熱度；熱量。2 體溫；發燒。3 （氣候的）高溫，暑氣。4 【冶金】熔煉的爐次；裝爐量；一...
  • convection : n. 1. 傳送。2. 【物理學】運流，環流；【氣象學】對流，上升氣流。
  1. Combined heat and mass transfer by natural convection which is caused by heat and mass diffusion can be seen in nature and some processes of industry, such as evaporation and desiccation. these processes relate to aeronautics, hydraulics, mechanics, chemical engineering, oceanography and aerography

    熱及物質擴散引起的傳熱傳質復合自然對流常見于自然界和蒸發、乾燥等工業過程，涉及到航空、水利、機械、化工、海洋、氣象等諸多領域，其流體力學和傳質傳熱特性一直是人們研究的重點。
  2. A two - dimensional double diffusive laminar natural convection in rectangular enclosure is detailed analyzed. the results show that when the thermal and solutal buoyancies aid each other, the airflow consists of one main cellular structure and is steady, regardless of the relative strength variation between the heat and pollutant sources. there are multiple flow structures, however, according to the relative strength when the buoyancies opposing each other

    模擬結果表明雙擴散自然對流系統的空氣流動與傳熱傳質特性完全是由離散熱源與污染源浮升力之間的相互作用關系訣定的：當離散熱源與污染源浮升力協同作用時，自然對流呈比較穩定的單一流動結構；而當熱源與污染源浮升力對抗作用時，自然對流系統隨它們之間強度變化呈現出多種流動狀態。
  3. Between glass - cover board and endothermic board, honeycomb is placed, which can eliminate heat loss caused by air natural convection and greatly reduce heat loss caused by radiation, and hence a better transfer heat efficiency

    而在透明玻璃蓋板和吸熱板之間放置蜂窩結構，基本上能消除吸收表面和蓋板之間的空氣自然對流熱損失，並可大大降低輻射損失，顯著提高集熱器的熱轉換效率。
  4. The traditional distributions of temperature and concentration just mark the final state that a convection system has reached but convey the information about how the heat and contaminant is transported across the system, and therefore we cannot get to know the natural characteristics of convection

    由於傳統的溫度與濃度等值線分佈僅展示了對流傳熱傳質系統所達到的最終狀態，而沒有提供熱與污染物的傳輸信息或結構，因此我們無法知道對流行為的本質特徵。
  5. Natural convection boiling heat transfer in enhanced heat transfer tubes

    強化傳熱管內的自然對流沸騰換熱
  6. 3. algebraically explicit analytical solutions of two - buoyancy natural convection in porous media applying the approach of separating variables with addition, the thesis derives three sets of simple and clear algebraically explicit analytical equations describing the natural convection in porous media with both temperature and concentration gradients. besides the theoretical meaning, they are more valuable for be the benchmark solutions to check and improve the computational fluid dynamics and computational heat and mass transfer

    三、多孔介質中溫度與濃度梯度耦合自然對流基本方程的代數顯式解析解本論文對王補宣院士等給出的反映多孔介質中溫度與濃度耦合自然對流的五元非線性聯立偏微分方程，利用加法分離變量法，導出了三套比較簡明的代數顯式解析解。
  7. The characteristic of combined heat and mass transfer by natural convection has been the focus of researches for a long time. numerical analysis is conducted for combined heat transfer and mass transfer by natural convection on inclined surface. effects of the inclination angle and the ratio of buoyancies due to heat diffusion and mass diffusion on fluid flow and heat and mass transfer characteristics have been investigated for pr = 0. 7 and sc = 0. 05 - 5. 0

    本文採用數值計算方法研究了傾斜平面上的傳熱傳質復合自然對流，求解了動量、能量及質量的完整方程，考察了熱質擴散共存時傾斜平面上的流動和傳熱特性，著重分析了熱浮力及物質擴散浮力之比b和傾斜角度對流體流動和傳熱傳質特性的影響。
  8. This may be done by ensuring that both leads are of equal length to equalize thermal conduction through them, by making any airflow ( whether forced or natural convection ) normal to the resistor body, and by taking care that both ends of the resistor are the same distance from any heat source on the pcb

    例如，讓電阻兩端的引腳長度相等以使熱阻相等；讓冷卻氣流（自然風冷或強制風冷）均勻地吹到電阻上；或者讓電阻兩端與pcb上的熱源的距離相等。
  9. The approximate analytical solution of melting process within a spherical enclosure is to presented by contacting heat transfer. a numerical model describing the melting process is presented by considering the difference of the solid - liquid density and natural convection

    在所建立的模型中考慮了固相與液相的密度差和自然對流的影響，得出了各個時刻液膜厚度的分佈、融化速率和傳熟量等計算結果。
  10. The direct - inserted solar energy water heater can be used independently for household life, and connected in series or in parallel into a collective hot water supply system for unit such as factory, mine, school, armed forces, guest house, hotel etc. where volume of hot water is needed not so much. both the full glass vacuum heat collection tube which takes natural convection of heat exchange and the heat pipe with superconducting medium have passed the ice and snow test in cold area, and have been recognized by customers in various kinds of climate conditions

    這種系統包括熱管真空管全玻璃真空管，熱保溫水箱，循環網路系統，循環泵和控制器系統，其工作原理：建立於定點溫度的基礎上，介於集熱器和熱保溫水箱間的循環泵系統強制循環，集熱管吸收的太陽能不斷的轉化為熱能，使水箱里的水不斷加熱。
  11. Direct numerical simulation of turbulent flow and heat transfer in square duct with steady natural convection in cross section

    具有截面自然對流通道內湍流換熱的直接數值模擬
  12. For verify the test theory, we used the numerical method the simulated the instrument heat exchanging. thus we checked the axial heat disturbing how to influence the test results, and checked the test time ’ s influence the test result, finding the time limit to avoid the natural convection influence

    運用數值方法模擬了測試儀器的實際傳熱過程，結果表明熱絲端部的軸向熱流在短時間內對測試的結果影響較小，採用雙熱絲可以有效避免端部效應。
  13. Supported by the national natural science foundation of china ( study on heat transfer characteristics of downhole coaxial heat exchanger in convection geothermal reservoir ) and tianjin development and plan program of science and technology ( study of ecologic architectural energy system ), the thermal performance exploiting earth energy for heating and cooling is studied in this paper ， and its main purpose is to offer reference for increasing the percent of renewable energy in ecologic architectural energy

    本文在國家自然科學基金（井下換熱器周圍對流型地溫地層內的傳熱特徵研究）和天津市科技發展計劃項目（生態能源建築體系研究）的資助下，重點研究了地表熱能（或稱地溫能）高效利用中的傳熱與熱力性能問題，為可再生能源在生態能源建築中發揮更大的作用提供依據。
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