transient heat transfer 中文意思是什麼
transient heat transfer
解釋
不穩定傳熱-
The explicit finite element method ( fem ) based on the varying time - step was selected to analyse the dynamic roll - pass process ; the nodes on the leading face of the steady - state elements set was extracted and projected onto a plane to give the required mesh, also called the origin mesh ; the implicit fem was selected to analyses the inter - pass transient thermal process ; a geometric part from the mesh was generated and meshed by using the quadrilateral elements, a heat transfer analysis was selected to transfer the node temperature data ; a new model was created by using hexahedral elements, mapping the node temperature and the equivalent plastic strain on the integration points
利用基於變步長中心差分格式的顯式積分方法分析瞬態軋制過程；提取穩態單元集節點形成截面網格；利用隱式積分方法分析軋制道次間隙瞬態溫度場；對型鋼斷面進行平面四邊形網格劃分並映射節點溫度數據；利用六面體單元構建有限元分析模型，映射單元節點的溫度、積分點的等效塑性應變，進行數值分析。 -
Standard test method for measuring extreme heat - transfer rates from high - energy environments using a transient, null - point calorimeter
用瞬變零點量熱器測量高能環境的超級傳熱速率的方法 -
The formulation for the flow model is given using the finite element / control volume ( fe / cv ) technique based on darcy ' s law of creeping flow through a porous media. the heat transfer model is based on the two - dimensional, transient heat conduction equation, including heat generation. the cure kinetics model is based on kamal ' s model, and the degree of the resin cure as a function of temperature and time
樹脂流動階段的模擬是根據牛頓流體在多孔介質中的滲流理論，應用darcy定律並使用有限元/控制體技術建立起來的；熱傳遞模型是一個二維瞬態熱傳導方程，考慮樹脂反應放熱；樹脂的固化模型利用了kamal提出的固化動力學方程，將固化度取為時間和溫度的函數。 -
In accordance to comprehensive analysis of the transient heat and mass transfer through the adobe building enclosure in the hygroscopic range, it is first to draw up the combined thermal and moisture transfer differential equations through wall - made - of - rammed - soil
通過對處于吸濕區范圍的生土建築圍護結構的傳熱傳質規律的詳細分析和研究，首次建立了生土建築圍護結構的熱質遷移微分控制方程。 -
The content of this thesis is the experimental research of transient boiling phenomena, which are the hot spot that was formed in the boiling heat transfer field since 1 970s
本文的研究內容是自二十世紀七十年代開始在國際上形成的一個沸騰傳熱研究領域的熱點? ?瞬態沸騰現象的研究。 -
Heat transfer and flow coupling calculation model of transient scenario for hot oil pipeline
熱油管道非穩態工況傳熱與流動的耦合計算模型 -
In the external region, heat transfer between the u - tube borehole and the ground is considered with a model of a finite line - source in a semi - infinite medium, and it is the first time to achieve an analytical solution of the temperature distribution for a such a transient two - dimensional conduction problem by means of the green - function method
對單個鉆孔的傳熱劃分為兩個區域分別進行研究。在鉆孔周圍區域，將豎直u型管的傳熱簡化為有限長線熱源的傳熱問題，採用格林函數法首次得到了有限長線熱源溫度分佈的解析解。 -
Firstly, wall ’ s transfer matrix is deduced by laplace transformation based on 3r2c thermal network model. secondly, frequency response of transfer matrix is calculated. thirdly, we make the frequency response of transfer matrix of stimulation model equate the theoretical frequency response of wall transient heat conduction by applying appropriate identification algorithm, from which we can obtain every polynomial ’ s coefficient of model transfer function, then each parameter of resistance and capacitance is calculated by appropriate optimization algorithm
首先，根據模擬熱流網路模型用拉普拉斯變換推出墻體的傳遞矩陣;然後，計算傳遞矩陣的頻率響應;最後，採用頻域回歸方法求出模型傳遞函數各次項的系數，進而通過一定的優化演算法確定模型的各個熱阻、熱容參數，使通過模型建立的多項式s -傳遞函數與墻體瞬時傳熱的理論超越s -傳遞函數完全等價。 -
The theoretical s - transfer function of ground - coupled envelope is deduced by laplace transformation. a simple polynomial s - transfer function is estimated from the theoretical frequency response of the ground - coupled envelope by frequency domain regression method, then we can calculate transient heat conduction through the ground - coupled envelope. it provides a novel idea to calculate the transient heat transfer from ground - coupled envelope more simply and efficiently
用頻域回歸方法求出觸地結構多項式s -傳遞函數，通過實例驗證了多項式s -傳遞函數與理論傳遞函數的等價性，並計算出觸地圍護結構的反應系數、導熱z傳遞函數系數和地面瞬時熱流，這就為更簡單、高效地計算觸地結構動態傳熱提供了一種新的思路。 -
Transient heat conduction analysis of functionally gradient material plate with convective heat transfer boundary by finite element method
對流換熱邊界下梯度功能材料板瞬態熱傳導有限元分析 -
Some detailed analyses were done especially for the difference of the theoretical description and practical situation. also, some cases such as the hypothesis that heat is transmitted in infinite rate of the classical fourier ' s law, the law " s foundation which is not fit for the transient heat - transfer in microscale condition were analyzed
針對理論解析結果與實際熱傳遞行為存在的差異作了詳細的分析，對經典的fourier定律所隱含的無限大熱量傳播速度、成立的基礎及在微小尺度瞬態熱傳導過程中應用所存在的不足等情況進行了分析。 -
The transient heat transfer between the drum wall and cooling water rising up with steady rate was simulated numerically using fem, and the time history of the stress and strain fields were also acquired with indirect coupling method
摘要利用有限元法模擬了焦炭塔進水冷焦階段恆速上升的介質與塔壁的動態傳熱過程，並用間接耦合法求得了應力、應變場的變化過程。 -
In this paper, a image processing method has been presented, with this method mean temperature of testing object can be arrived at from infrared picture and the interior temperature gradient of the test pieces in the situation of transient heat transfer can be got. unsteady - state heat transfer mechanism of wall has also been studied in this paper. on the basis of theoretical analysis and experimental study we can get such conclusions : infrared testing of energy conservation of buildings is rapider and more accurate than heat - flow meter method which is popular at present ; heat transfer mechanism in the situation of unsteady - state heat transfer has been analyzed through experiment ; the interior layers ’ temperature of the test pieces ascent in company with
本文在理論分析和試驗研究的基礎上得出以下結論:本文研究的紅外檢測建築節能的方法比目前存在的熱流計法更快速、更準確;用試驗分析了墻體在非穩態傳熱情況下的傳熱機理;試件各層溫度隨著受熱面環境溫度的上升而上升，只是上升的程度不同，響應時間不同，這是由於試件內部有一個蓄熱過程;通過傳熱理論和建築熱工計算推導出了非穩態傳熱情況下的傳熱系數的計算公式;本文用matlab進行紅外圖片的處理，進而得到被測物的平均溫度;用數據處理軟體擬合溫度熱流。 -
Numerical characteristic parameters of meshless method have been investigated in solving radiative heat transfer problem. meshless method is also extended to solve the transient radiative transfer equation. the main work includes the following four aspects of investigations
本論文主要研究內容包括以下四個方面: 1 .在輻射傳遞的離散坐標方程基礎上，建立了均勻折射率介質內輻射傳遞方程求解的局部彼得羅夫伽遼金無網格法。 -
Transient heat transfer problems for buried hot waxy crude pipelines
埋地熱含蠟原油管道的非穩態傳熱問題 -
Nanofluids exhibit superior heat transfer performance to conventional heat transfer fluids. one of reasons is that the suspended nanoparticles remarkably increase the thermal conductivity of the nanofluids. in this paper, the transient hot - wire instrument for measuring the thermal conductivity of sample nanofluids is developed
研製了一套瞬態熱線實驗系統，測定了幾種納米流體的導熱系數，分析了納米粒子屬性、份額、形狀、尺度及納米流體溫度等因素對納米流體導熱系數的影響，探討納米流體強化導熱系數的機理。 -
It will present a new method - frequency - domain regression ( fdr ) method based on system identification theory for calculating transient heat flux through multi - layer walls. first, the frequency characteristics of the total transmission matrix are calculated within the frequency range concerned. then, a simple polynomial 5 - transfer function is yielded from the theoretical frequency characteristics for internal, cross and external heat conduction by applying appropriate identification algorithm, respectively
首先在所關心的頻域范圍內計算出總的傳遞矩陣的頻率響應，然後採用適應的辨識演算法從墻體不穩定傳熱的理論頻率響應中構造出一個簡單的多項式s -傳遞函數，該多項式s -傳遞函數與墻體瞬時傳熱的理論的超越s -傳遞函數完全等價。 -
The principle of the finite element method is introduced, and some expressions relating to transient dynamic analysis and transient heat transfer analysis are given. the transient dynamical characteristics of the structure are analyzed and the structure is checked according to the theory of intensity
介紹了有限元法求解過程，給出了瞬態動力學分析和瞬態傳熱分析的有限元公式，然後分析了結構的瞬態動力特性，採用強度理論對結構進行初步校核。 -
A mathematical model is developed for simulating transient performance of the turbofan engine, in which the transient heat transfer between the components and airflow, tip clearance and components efficiency changes caused by heat transfer are analyzed
摘要以某渦扇發動機的過渡態性能模擬為研究對象，建立了過渡過程中零部件與氣流之間的不穩定熱交換、由於熱交換引起的間隙變化以及引起的部件效率變化的數學模型，並且將此模型引入面向對象的航空渦扇發動機過渡過程性能模擬程序的框架中。 -
The calculated result shows that there are significant influences of heat transfer on the engine ' s transient performance, and the component efficiency loss caused by tip clearance changes can not be ignored
通過計算分析，零部件與氣流之間的熱交換對發動機過渡過程性能有顯著影響；過渡過程葉尖間隙的變化引起的部件效率損失是不容忽視的。
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