熱耦合系數 的英文怎麼說
中文拼音 [rèǒugěxìshǔ]
熱耦合系數
英文
heat couple coefficient- 耦 : Ⅰ動詞[書面語] (兩人並耕) plough side by sideⅡ名詞1 (古農具名) plough2 [書面語] (兩人一組) a...
- 合 : 合量詞(容量單位) ge, a unit of dry measure for grain (=1 decilitre)
- 系 : 系動詞(打結; 扣) tie; fasten; do up; button up
- 數 : 數副詞(屢次) frequently; repeatedly
- 耦合 : [物理學] coupling; interconnection; catena; linkage; linking
- 系數 : [數學] coefficient; ratio; modulus; quotient; factor
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Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet - parameter on evaporator. fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio - parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping
本文的主要內容如下: 1 )對翅片管蒸發器結構特點進行分析,選取適當的微元控制體,就干、濕和霜工況下對每個微元分別進行傳熱傳質分析,基於經驗關系式確定霜的有關參數,對于霜工況下的霜生長建立模型,經適當假設,運用質量守恆、能量守恆和動量守恆方程建立適合動態模擬的蒸發器數學模型,為系統模擬奠定基礎; 2 )對蒸發在大擾動下的開、停機過程,運用動態集中參數模型進行分析和計算,為更好地描述製冷系統運行的全過程奠定基礎,同時也為製冷系統實現自動控制提供一定的理論基礎; 3 )對蒸發器正常運行過程,運用動態分佈參數和參數間定量耦合的觀點來分析和計算,為更好地了解穩態工況下各點參數的變化情況及各入口參數對蒸發器動態特性的影響即蒸發器性能對各參數變化的敏感性; 4 )編寫翅片管蒸發器動態特性模擬計算程序,可以計算不同邊界條件和初始條件下的製冷劑熱力參數、空氣溫濕度和霜厚度分佈場,實現對翅片管蒸發器在干、濕和霜工況下的動態模擬。Analyzing the physics structure of vorticity, divergence, vertical velocity, frontogenesis " function, apparent heat source and apparent moist sink etc. indicated the physics fields are favorable for the occurance of the heavy rain over changjiang - huaihe river basin where the physics values are well according to the heavy rainstorm positions ; the low level jet is closely subject to the moisture and the coupled system of the low and the upper level jetstreams induced the strongly " ascending motion ; the intensity of the frontogenesis varies with the development of the rainfall system and reacts the rainfall intensity
主要分析了這次過程中的多種物理量,包括渦度、散度、垂直速度、鋒生函數、視熱源、視水汽匯等,對這一暴雨過程有了比較系統的認識。結果表明:在江淮流域存在著有利於發生暴雨的物理量場配置,渦度、散度、垂直速度等物理量,與暴雨的落區都很吻合的;低空急流的產生不僅有利於水汽的輸送,而且高低空急流的耦合造成了有利於強上升運動的配置;鋒生強度隨著降水系統的發展變化,並影響降水強度。Iv ) for the strong interfacial coupling, there exist three pyroelectric peaks in the temperature curve of pyroelectric coefficient, and with the decrease of the interfacial coupling, the number of the pyroelectric peaks will decrease gradually
我們還發現,較強的界面耦合導致熱電系數的溫度曲線上的三個熱電峰的出現;而界面耦合強度的減弱及鐵電超晶格尺寸的減少將導致某些熱電峰的消失。In addition, the dynamic equation about ammonia fertilizer affected by interaction of water and temperature is gotten. 3. the phenomenon about water vaporization - induced ammonia volatilizing is verified, and it is studied quantitatively
此外,通過回歸分析還建立了表徵施入土壤中尿素轉化為銨態氮的動力學型方程,其參數均與土壤水分、溫度有關,並得到這些參數的水熱耦合效應關系式。Aiming at such problems in combustion system of homemade middle and miniature boiler, as a complex system with the character of dead zone, time variation, serious non - linearity, large time delay, coupling and a lot of disturbance, this paper presents a new set of optimal control resources. by using well - matched control method on system, stable automatic running is realized. having the serious divulgence coals difference a lot from each other in character, instability of chemistry, value of lowest emission of heat, home - made boiler controller is not at all ideal. instead of traditional model that controls the ratio based on proportional control or with the correct signal of the amount of oxygen, this paper, combined with intellect control theory - - fuzzy control and self - optimizing concept, propounded a kind of fuzzy self - optimizing controller to be used in air supplying system of the boiler, and expatiates on the idea of dividing the control process into two parts, dynamic and static to realize, thus meets the demand of homemade boiler economic running
本設計針對國產中、小型電站鍋爐燃燒系統參數時變、嚴重非線性、干擾因素復雜、耦合嚴重、模型不易確定的特點,提出多變量協調控制方案,解決了系統可控性差,難以實現穩定自動運行的問題;在此基礎上,改變以往以煙氣含氧量控制送風的傳統模式,針對國產電站鍋爐設備主體及一、二次送風迴路泄露嚴重,煤種混雜、成分不穩定、燃燒發熱值低、燃燒效率不高等問題,應用智能控制理論中的模糊控制技術,結合自尋最優控制的思想,設計了一種模糊自尋優控制器,應用在電站鍋爐送風控制系統上,並闡述了動靜態兩種實現途徑,通過在線優化風煤配比,實現最佳經濟燃燒,切實保障了鍋爐的經濟運行。The blade inner channel cooling is a complex convection - conduction coupling problem. this thesis build a three - dimension. compressible turbulence model, and give a general solve method. with the geometrical model of the glossily rectangle straight channel, the rectangle straight channel with in - line arrays disturb plates, the rectangle straight channel with staggered arrays disturb plates, the rectangle straight channel with slant disturb plates, this thesis compute the flow and heat transfer condition when the cold air path though these channels, and gain the temperature field, pressure field, velocity filed, in addition. this thesis also analyze the influence of the different channel height, the different channel materials, the different channels, and gain the function relation between he nusselt number, friction factor and reynolds number. this thesis is emphasis on the new heat transfer enhancement structure, that is, disturb plates, with the comparison with the glossily channel and channel with pin fins, the heat transfer enhancement effect of the former is better, and the conclusion can be used in the design of aircraft blade
葉片內部通道冷卻是一個復雜的對流?導熱耦合傳熱問題,本文在分析葉片內部通道冷卻的流動與傳熱情況的基礎上,建立了三維、可壓縮紊流的物理模型,得到了通用的求解辦法;利用不帶擾流片的矩形直通道、帶順排擾流片矩形直通道、帶叉排擾流片、帶傾斜擾流片的矩形直通道的幾何模型,計算了冷卻空氣通過這幾種通道時的流動與換熱情況,得到了各種不同情況下計算區域的溫度場、壓力場、速度場;在此基礎上分析了不同的通道高度、不同的葉片通道材質對葉片內部通道冷卻的影響,並整理得到了各種通道形式下,努謝爾數和阻力因子與雷諾數的函數關系;本文重點研究了新型的葉片內部通道冷卻強化傳熱措施?帶擾流片的內部冷卻通道的強化傳熱效果,通過與光滑矩形直通道、帶針肋通道的冷卻效果的比較,表明了這種新型鮚構的優勢,對于葉片內部通道冷卻結構的設計可以起到指導的作用。Tantalum lithium ( litao3 ), a novel single crystal material, developed and industrialized with the development of communication and information industries recently, owns the excellent performances such as high mechanical - electrical coupling coefficient, lower wear - resistance, excellent high - temperature stability, excellent high - frequency capability, etc. however, researches on tantalum lithium single crystal wafer around world are still lacking
鉭酸鋰是近年來隨著通訊、信息產業迅速發展而開發並產業化的新型光電子材料。它具有機電耦合系數大、低損耗、高溫穩定性、高頻性能好等優良的壓電、電光和熱電性能。We also find that the strong long - range interaction, the large transverse field and weak interfacial coupling can lead to the disappearance of some of the peaks of the pyroelectric coefficient and susceptibility of the ferroelectric bilayer. we believe that it is the reason why these phenomena always take place in the experimental studies
我們還發現,較強的長程相互作用,較大的橫場以及相對較弱的界面耦合作用將會導致鐵電雙層薄膜的熱電系數和介電極化率的某些峰消失,這可以用來解釋在實驗中常常觀測不到熱釋電系數和介電極化率的某些峰值的原因。In addition, the model of interaction of water and temperature between field water vaporization and soil water storage, temperature and millet weight is gotten by field trial. 2. the ammonia volatilizing of fertilizer is suit to the dynamic equation as y = a + bt, the coefficients in the equation are related to the kind of fertilizer, temperature and water content of soil, and the dynamic equation about ammonia volatilization including water and temperature and the is developed
肥料氨累積揮發量符合零級反應動力學方程y = a + bt ,方程中系數與肥料種類、溫度和土壤含水量有關,碳銨a 、 b值均比硫酸銨高,土壤含水量增大, a 、 b值降低,溫度升高, a 、 b值增大,並由此得到含溫度或土壤濕度因子的肥料氨揮發動力學方程,並建立了含水、熱因子的肥料氨揮發水熱耦合效應動力學方程。The paper establishes mathematics model of electromagnetic heating system of eddy current field and temperature field, and gives corresponding discrete format with elements as eight nodes, hexahedron equal cell, through calculating eddy - current field to gain the internal heat source that the temperature field needed, to use discrete method to solve the problem of induction - heating part ' s temperature field by axial symmetrical electromagnetic, and then to analyze the characteristic of instantaneous temperature field
本文建立了電磁加熱系統的渦流場和溫度場間接耦合的數學模型,分析了不同頻率下渦流和溫度的分佈情況,並以八節點六面體等參元為例給出了渦流場對應的離散格式,通過計算渦流場獲得溫度場所需要的內熱源強度,加熱部件的溫度場以軸對稱格式進行離散求解,並對瞬態溫度場有限單元法的求解特點進行了分析。The main solutions in the paper are : 1. the vaporization of soil water is suit to the dynamic equation as y = a + blnt, the coefficients in the equation are related to temperature and water content of soil, and the dynamic equation about vaporization including water and temperature and the is developed, which provide some new information for studying and applying dynamic including environmental factors
土壤水分累積蒸發量符合elovich動力學方程y = a + blnt ,方程中系數與溫度和土壤初始含水量有關, a 、 b值隨土壤初始含水量和溫度增高而增大,由此得到含溫度因子或土壤濕度因子的土壤水分蒸發動力學方程,並建立了含水、熱因子的土壤水分蒸發水熱耦合效應動力學方程,為含環境影響因子動力學方程的研究和應用提供了新的信息。There are many plants that have the character of time - varying, large delay, large inertia in the process of production of modern power station such as the superheated steam temperature, the reheated steam temperature, the water treatment of boiler and the load regulation. some of them have the strong character of nonlinear and some of them are multivariable coupling systems it is very difficult to obtain good effect of control by conventional pid control. it is necessary to set up the mathematics models of controlled plants if applying control means of modern control theory such as self - adaptive control, optimal control , decoupling control and predictive control. and these control systems have large calculation and bad character of real time in general. these disadvantages make them be not able to meet the need of real production process and limit the application of them in modern power station. now the generator units are developing towards large capacity and high parameters. many new kinds of generating electricity means are coming into being. the characers of production units of power station become more and more complex but the demand to quality of control becomes more and more strict. the new control means are in bad need to control them effectively
現代電站的生產過程中存在過熱汽溫、再熱汽溫、鍋爐水處理、負荷調節等許多大遲延、大滯后、特性時變的對象,它們中有些還是具有強非線性特性的對象或多變量耦合系統,採用常規的pid控制手段很難取得良好的控制效果。若應用現代控制理論中的自適應控制、最優控制、解耦控制、預測控制等控制手段,則需要建立被控對象的數學模型,而且往往控制系統的計算量大、實時性差。這些缺點使其很難滿足實際生產過程的需要從而極大地限制了其在現代電站中的應用。Ltd. a coupled vibration method on suspended free poles is employed to determine the initial young ' s modulus at elevated temperatures, also the thermal expansion coefficients of fire - resistant steel
通過高溫下的恆溫加載拉伸試驗,得到不同溫度下耐火鋼的屈服強度、極限強度、延伸率、面縮率和應力應變關系,並測定高溫下耐火鋼的熱膨脹系數,採用懸絲耦合共振法測定高溫下耐火鋼的初始彈性模量。To solve the heat transfer boundary problem among the piston, liner, coolant and body parts, especially the temperature and heat transfer among the coolant, liner and body
摘要為解決發動機活塞組缸套冷卻水機體之間傳熱邊界條件難以確定的問題,尤其是冷卻水和缸套、機體之間的流固邊界的溫度和換熱系數,將這幾個部件作為一個耦合系統進行傳熱研究。In terms of the measure of entanglement called " negativity ", the thermal entanglement in a two - qubit spin - 1 system with two spins coupled by exchange interaction is investigated, we find that there is a segment for j in which the entanglement is zero, moreover the segment increases with t, this is different from the cases of the spin - 1 / 2
應用糾纏度對高維度系統的度量方法- - - 「 negativity 」 ,我們研究了自旋等於1的兩量子比特系統的熱糾纏,我們還發現在耦合常數一般區域糾纏度為零,這個結論和自旋等於1 2的情況是不同的。( 4 ) after the rationality of numerical simulation has been testified, going along a series of numerical simulation and performance research. firstly, the thermal superposition principle, based on adiabatic heat transfer coefficient and superposition kernel function, is put forward for the research of discrete heat sources ’ temperature field and thermal conjunction effects secondly, decreasing thermal spreading resistance is good for improving the heat transfer performance, and several methods are discussed
第一、在熱疊加原則理論基礎上,利用數值模擬方法研究了固態組件的溫度場和多個分散熱源在熱擴展體上的熱耦合效應,而且證明了強迫對流情況下熱疊加原理形成的溫度場和系統模擬時的溫度場計算結果非常吻合;第二、針對固態組件里集中熱源的特點,對擴展熱阻進行了研究,從理論上探討了減小擴展熱阻改善散熱性能的方法。In the paper, the classical yield stress, flow stress and the newest research results of the magnesium alloy constitution models are summarized, the status of the thermal - mechanical coupling numerical simulation of the magnesium alloy sheet warm pressing and the corresponding softwares in common use are reviewed
總結了經典屈服模型和材料本構關系模型以及國內外學者在經典理論基礎上建立起來的鎂合金材料模型;探討了板料成形有限元數值模擬技術以及目前常用的模擬軟體;並在此基礎上綜述了鎂合金沖壓變形的熱機耦合的數值模擬的研究進展。Second, the thermoelastic coupling vibration of cylindrical shell are discussed by means of the same method. the coupling coefficient, amplitude of temperature, initial displacement, ratio of length to radius and that of radius to thickness are main factors which influence the thermoelastic vibration of cylindrical shell ; the higher the coupling coefficient is, the lower the axial force, the axial stress and the axial moment are
其次,我們用同樣的方法研究了圓柱殼的非線性熱彈耦合振動,主要結論如下:影響圓柱殼非線性熱彈耦合振動的因素主要有耦合系數、溫度幅值、長徑比、徑厚比以及初始位移參數;耦合系數越大,軸向應力、軸向力以及軸向彎矩越小。Zero - value coefficients about interaction of water and temperature is put forward, zerovalue phenomenon about interaction of water and temperature and energy character that moisture vaporizes, ammonia volatilizes, millet seeding grows and it absorbs nitrogen are brought to light
在所研究各種體系水熱耦合效應基礎上,提出了水熱效應零值參數概念,揭示了水熱耦合效應零值現象及水熱耦合作用下土壤水分蒸發,肥料氮揮發和穀苗生長及氮素吸收的能量特徵。The research in the dissertation consists of two major parts. the first part includes the analysis and sensitivity analysis of steady state and transient heat conduction, the construction of design model and the algorithms of design optimization for heat conduction
本文主要研究了熱傳導?結構耦合系統的優化設計以及靈敏度分析的理論和數值方法,並且在大型有限元和結構優化軟體系統jifex中成功實現相關的計算功能。分享友人