turbulent heat transfer 中文意思是什麼
turbulent heat transfer
解釋
亂流或湍流熱交換-
Regressed the experimental date with linear use minimal dual multiply method. got the empirical equation of heat transfer and flow resistance in laminar, transitive and turbulent zone
Reb隨肋高h 、肋軸向間距pt的增大而減小，隨肋寬的增大而增大。 -
By comparing the results with relative experiment data, it is shown that rng k - is more exactly than the other turbulent model. 2 ) the influences of axial inflow position, radial outflow size, rotating reynold number, non - dimensional mass flowrate and axial inflow angle on the flow and heat transfer characteristics were numerically investigated for a typical rotator - stator cavity with axial inflow, radial inflow and radial outflow. the correlations for average nusselt number vs rotating reynold number or non - dimensional mass flowrate were established
（ 2 ）針對一典型的徑向、軸向進氣，徑向出氣的轉-靜盤腔結構，系統研究軸向進氣位置、徑向出口大小、旋轉雷諾數、無量綱質量流量和軸向垂直預旋進氣等對盤腔內流動和換熱的影響，整理出轉-靜盤腔內轉盤平均努謝爾數與旋轉雷諾數無量綱質量流量之間的準則關聯式。 -
In the third chapter of this dissertation, based on the physical and chemical properties of hydrogen and the combustion characteristics of hydrogen, the quasi - dimension combustion calculation model of hydrogen ? fueled engine is set up through analyzing the characteristics of turbulence flame and chemical reaction kinetic of hydrogen ? air mixture. the model includes the dual ? area thermodynamics sub - model, quasi - dimensional turbulent entrainment combustion sub ? model, turbulence flame promulgating sub ? model, hydrogen - air mixture chemical kinetic sub - model and loss of heat transfer sub - model and so on
本文從氫燃料的物化特性和燃燒特徵著手，通過分析氫空氣混合氣燃燒的湍流火焰結構和燃燒化學反應動力學，基於雙區燃燒模型，建立了包括雙區熱力學、準維湍流卷吸燃燒、湍流火焰傳播速度、氫空氣混合氣燃燒化學反應動力學以及傳熱損失等模塊的燃燒模型，並給出了相應的計算方法。 -
Based these researches acquired and using a mathmatical model, this thesis tries to research the contaminant concentration distributions of three - dimention indoor turbulent flow by means of computational fluid dynamics and heat transfer, and then works out the ventilation efficiency
本文企圖在前人的基礎上，通過建立相應的數學模型，用流體流動數值計算方法來模擬室內三維的紊態氣流中的污染物濃度分佈，進而分析計算室內的通風效率，得出通風效率較好的室內氣流組織形式。 -
2 ) from the analysis of the aerodynamic parameters and turbulent flux transfer under different synoptic conditions we achieve the conclusion that on sands raising and sandstorm days turbulent momentum and sensible - heat fluxes are important exchange factors in the boundary layer, with turbulent exchange stronger in sandstorm weather than both on fine and sand raising days. prior to the occurrence of such an event, in particular, the super - adiabatic instability in the near - surface boundary will reinforce sandstorm weather condition. 3 ) atmospheric turbulent diffusion parameters z and y have apparent daily variation
沙塵天氣下以親地殼元素為主的氣溶膠元素濃度均高於背景大氣和浮塵天氣，而且沙塵天氣強度愈強，元素濃度的增加愈顯著；背景大氣、浮塵天氣條件下親地殼元素的濃度一般在10 ~ （ - 1 ） 10 ~ 0 g m ~ 3量級，揚沙、沙塵暴時一般達10 ~ 1 g m ~ 3量級，特強沙塵暴時高達10 ~ 2 g m ~ 3量級。 -
Abstract : the transfer performance such as hydrodynamics, mass transfer, heat transfer and mixing in turbulent bed contactor were systematically presented, and the calculations on this equipment were also given
文摘:系統地介紹了湍球塔的流體力學行為和傳質、傳熱、混合等傳遞過程及其工程設計計算。 -
For this regime, the heat transfer is usually predicted by the linear interpolation or extrapolation of the results of turbulent and / or laminar regimes, associated with great uncertainty in the evaluation of the performance of heat transfer
現階段人們在實際計算中，往往採用線性內插法或延伸湍流區和層流區傳熱曲線的方法，從而使結果存在很大的不確定性。 -
Secondly, the relation between nusselt number and the local time - averaged velocity and temperature fields of turbulent convection was theoretically induced, which expands the field - coordinated enhancement principle to turbulent convective heat transfer
然後，在理論上導出了紊流對流換熱的整體換熱性能與局域時均速度場和時均溫度場的一般關系式，將對流換熱的場協同強化原則擴展至湍流換熱。 -
Research on turbulent pipe flow heat - transfer characteristic of urban wastewater as a cool and heat source
城市原生污水冷熱源圓管紊流換熱特性 -
It shows that both laminar and turbulent convective heat transfer can be enhanced by improving the coordination between the velocity and temperature fields
這表明層流和湍流對流換的強化均可通過改善速度場和溫度場的協同而獲得。 -
Study on mechanism of turbulent flow and heat transfer in rotating passages
旋轉狀態下蛇形通道內流動與換熱的機理研究 -
The numerical analysis indicates that that the multi - longitudinal vortex flow in tubes can markedly enhance both the laminar and turbulent heat transfer with less additional increase of flow resistance
結果表明，管內多縱向渦對層流和湍流換熱的強化效果顯著而流阻增加較少，具有優良的綜合強化換熱性能。 -
The type of heat transfer inside the pipes belongs to single - phase compulsive turbulent flow of inner pipe. inner trachea is a kind of special pipe compared by smooth pipe, which can strengthen heat transfer inside pipe
空預器煙氣側的換熱類型是管內單相強迫紊流換熱，論文在查閱了相關文獻的基礎上，比較了幾種不同的管內強化換熱措施，在其中選擇內螺紋管代替光管，來改造管式空氣預熱器。 -
Numerical simulation of thermal environment in an urban residential district is a heated and challenged topic home and abroad in recent years. this dissertation analyzes and studies mainly the basic theories and applications of cfd ( computational fluid dynamics ) and nht ( numerical heat transfer ). governing equations of outdoor turbulent airflows have been set up and improved, considering the impact of temperature differences, which induces the standard k - e turbulent model insufficient
城市住宅小區熱環境數值模擬研究是近些年國際上研究的熱點和難點，本文主要從cfd / nht基礎理論及應用闡述了這一問題：建立室外空氣湍流運動的控制方程（組） ，並且針對一般標準k -湍流模型存在的問題，考慮溫差的影響並對其加以改進。 -
Comparison of two radiative heat transfer models in three - dimension turbulent gas and coal - particle combustion
三維湍流迴流氣相和煤粉燃燒輻射傳熱離散坐標模型和熱流模型比較 -
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 -
In the laminar flow regime, a analytical mathematical model is obtained by analyzing the film flowing in the wavy wall tube. in the turbulent flow regime, mathematical model almost ca n ' t be obtained directly because the turbulent flow in wavy wall tube is very complex, the model is obtained by quoting some results which are theorized by other studiers. in the part of experimental study, the flow form in the wavy wall tube is observed by transparent quartz glass wavy wall tube apparatus, the evaporation experiments are carried out in a 3 meters steel wavy wall tube, using glucose as the medium, heat transfer is invested, the heat transfer correlations of wavy wall tube evaporator are obtained
數學模型的建立過程中，對于液膜層流流動，直接對波形管內的降落液膜進行理論分析，得出液膜層流流動下數學模型的解析式；對于液膜湍流流動，由於湍流流動的復雜性，再加上所採用的波形管對湍流流動的影響，直接對降落液膜進行理論分析建立數學模型是極其復雜的，通過採用以前一些研究者得到的理論分析與實驗結果，並引入與波形管的形狀特徵參數有關的修正系數k ，建立液膜在湍流流動下的數學模型。
分享友人