熱流體密度 的英文怎麼說

中文拼音 [rèliútǐmìdù]
熱流體密度 英文
density of hot fluid
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 體 : 體構詞成分。
  • 密 : Ⅰ名詞1 （秘密） secret 2 [紡織] （密度） density 3 （姓氏） a surname Ⅱ形容詞1 （距離近; 空隙小）...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 流體 : [物理學] fluid; fluor流體力學 fluid mechanics; hydromechanics; 流體生物學 hydrobiology; 流體運動學 hydrokinematics
  1. Convection above a hot surface occurs because hot air expands, becomes less dense, and rises ( see ideal gas law )

    對流段的一個熱門表面出現的，因為熱空氣的擴大，成為密度較低，而上升（見理想氣體定律） 。
  2. The saturated densities, vapour pressures, and latent heats of vaporization for hfc working substances of refrigeration are calculated by using a set of general equations of thermophysical property of liquids

    摘要應用一套通用型流體熱物性方程對hfc類致冷工質的飽和密度、蒸汽壓和汽化潛熱進行計算。
  3. Moreover, a method for iterating thermal and magnetic analysis is put forward. in chapter 5, the distributed characteristics of eddy and temperature fields in induction heating process are simulation by fem respectively, including the distributions of eddy and temperature fields during the whole induction heating process, the influence of frequency and magnetic disperse, and the prediction of hardened depth

    第五章:用ansys軟體對感應加熱過程中工件內渦流場、溫度場的一些基本問題進行模擬及分析，主要包括:加熱過程中工件渦流功率密度及溫度分佈規律;頻率與磁力線逸散對加熱效果的影響;同時對感應淬火淬硬層深度進行了模擬預測。
  4. Magnetics is one of the main factors, which limit the power - density and characteristics of power module. for lowing weight and volume, reducing power loss and ripple current, improving dynamic performance, the magnetic - integration technique has been one of the research populations in power electronics. the thesis researches the magnetic - integration applied to the active - clamp forward converter so as to reduce the ripple current and improve its performance

    對于已經大量採用高頻軟開關技術的模塊電源，限制其功率密度進一步提高、性能進一步改善的重要因素之一是磁性元件，而磁集成技術由於具有可以減小磁件體積重量，減少磁件損耗，減小輸出電流脈動，改善輸出動態性能等優點，成為目前電力電子技術的研究熱點之一。
  5. Abstract : approximate methods for calculating aerodynamic heating rates on space shuttles are discussed. various methods are given for predicting the heating rate at axisymmetric stagnation points, general three dimensional stagnationpoints and the leading edge stagnation point of wings. numerous laminar and turbulent heating techniques for flat plates and cones are analyzed and compared. a brief review of some methods is presented to predict heating rate for winward centerline and lateral direction off the symmetry plane. the results show that the methods are simpler and can guarantee enought precision for predicting aerodynamic heating environment of space shuttles

    文摘:介紹了國內外預測航天飛機氣動加熱的工程計算方法.給出了軸對稱、非軸對稱和機翼前緣等各種外形駐點熱流密度的計算，分析和比較了平板、錐體的層流和湍流熱流密度計算的各種方法，概述了航天飛機迎風面中心線和離開中心線橫向熱流密度的計算.計算結果表明，本文方法用在航天飛機氣動熱環境初步設計中比較簡單並且有足夠精度
  6. The main work can be summed up as follows : firstly, we studied the thermal - field properties of vcsels, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of vcsels, and then studied the influences of the oxide - confining region with different position or thickness, and the different sizes of the gain - guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. thirdly, we realized the coupling of electricity, optical and thermal - fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, fermi levels and optical - field

    具體工作可以概括如下：首先，研究了vcsel的熱場特性，分析了電流擴展，材料參數和工作條件對于溫度分佈的影響；其次，從電極電壓入手，計算出激光器中的等勢線分佈，並對不同深度處的電壓和電流分佈進行比較，研究了高阻區的不同位置和不同厚度、限制層和出射窗口半徑的大小對電流密度、載流子濃度和溫度分佈的影響；再次，實現了電、光、熱耦合，求出了閾值電壓，計算了不同偏置電壓下的電流密度分佈、載流子濃度分佈和熱場分佈，分析了溫度和載流子濃度變化對折射率、費米能級和光場的影響；最後，給出了考慮n - dbr和雙氧化限制層時激光器中的等勢線分佈，分析了n - dbr和雙氧化限制層對vcsel電流密度、載流子濃度、溫度和光場分佈的影響。
  7. Thermal dissipation of electronic equipments is rising more and more quickly, but their volume is smaller and smaller. the heat flux of component is increasing geminately. the fluid cooling system plays an important role in industry production, aeronautics and astronautics, military equipment of national defence

    隨著電子設備的發熱量越來越大，而器件本身的體積越來越小，器件的熱流密度成倍增加，液體冷卻系統在工業生產、航空航天、國防軍事裝備等領域的電子設備散熱設計中發揮著重要作用。
  8. The following is the experimental investigations on solidification process of stearic acid. the influences which the inlet temperature and reynolds number of the cooling water have on the solidification process are presented. figures that display how heat flux change versus time has been drawn and analyzed

    然後是硬脂酸凝固問題的實驗研究，分析了換熱流體進口溫度、換熱流體re數大小對凝固過程的影響，繪制了凝固過程中熱流密度變化曲線，比較了螺旋肋肋寬對強化傳熱效果的影響。
  9. The immersion electrical heater is chiefly applied in the direct contact mode of fluid heating. it features fast heat exchange and high thermal efficiency. it has the varieties of water heater, oil heater and gas heater. its heating element power density, i. e. the power per unit of heating area of the heating element, is an important parameter of the electrical heating element, which has a direct bearing on the performance and working life. the working out of the value is a highly specialized problem, being under the influence of many factors ( media flow rate, tempt, physical and chemical properties and direction in which the medium flows past the element etc )

    浸入式電加熱器主要用於直接對流體接觸加熱的場合，具有熱交換快，熱效率高等特點，分為水用加熱器、油用加熱器、氣體用加熱器，加熱元件的功率密度：即電加熱元件單位發熱面積上的功率，它是電加熱元件極重要的參數，直接影響加熱器的使用性能及使用壽命，它的取值是一個非常專業的問題，受到許多因素的影響（如介質的流速、溫度、物理和化學性質及介質流過加熱元件的方向等等） 。
  10. Organic - inorganic nanocomposite, which are the complex of inorganic nanopraticles with organic compound, is a popular study subject in nanoscale composite. the nanocomposite can not only take advantage of several advantage, but also produce new properties. in this thesis, taking account of the problems in electrorheological fluids such as high leakage current, low yield stress and stability, the pan - batio3 nanocomposite with different structure are prepared by in - situ complex technology and modified sol - gel method

    根據目前電流變液中出現的問題（如屈服應力不夠高，漏電流密度不夠低，穩定性不夠好等問題） ，基於聚苯胺有較高的熱穩定性，且密度又小，特別是聚苯胺的介電常數和電導率均可按需調整，此外，鈦酸鋇無機納米粒子作為一種無機鐵電體，在電場作用下具有自發極化的能力，一方面可以為體系提供高的介電常數，另一方面又可保證體系的絕緣性能。
  11. This article makes a numerical simulation and analysis of the skin effect of the downhole heating cable conductor by using the finite element method, thereby finds out the distribution characteristics of the current density of the cable, and indicates the effect of the frequency of alternating current on the skin depth

    摘要運用有限元法，對交頻井下伴熱電纜導體內部的集膚效應現象進行了數值模擬和分析，比較直觀地得出交頻電纜中電流密度的分佈特性，以及交流電的不同頻率對導體集膚深度的影響。
  12. Abstract : this paper describes the thermal effects of a coaxial rf - excitedco2 laser ， based on the balance equations of electron density and energy ， current continuity equation ， and heat conduction equation. depende ncies of the spatial distributions of gas temperature on some discharge parameters arediscussed

    文摘:通過求解放電等離子體中的帶電粒子密度和能量的平衡方程、電流連續性方程以及熱傳導方程，研究了同軸射頻（ rf ）激勵co2激光器中放電混合氣體的溫度效應，分析了有關放電參數對溫度分佈的影響。
  13. To the concrete two - phase flow - crude oil, its temperature, speed and capacitance value are measured by flat capacitance sensors, fluke rlc instrument and other auxiliary appliance. assessing the characters of crude oil and predicting the solidifying point is the result of using fuzzy information arithmetic

    針對具體的兩相流? ?原油，用平板電容器、 fluke精密電橋和其它輔助傳感器分別測取了原油的熱處理溫度、降溫速率和電容值，利用模糊信息融合演算法對測量值進行處理和尋優，從而進行原油熱處理的綜合評定和凝點的在線預測。
  14. Since the company began to resrerch and make radiators in 80 ' s last century, domestically advanced production lines have been adopted in the production. we sim at 100 % conformity of heat impedance performance curve with the testing standards stipulated in st2564 - 85 standard book of " profiled material raditors " which is promulgated by ministry of electronic industry of people republec of china. the radiators are matching heat - radiating components for power semiconductors, generally can be applied to fields of large and small power appliances, hi heat current density utensils, whole - set apparatus, electuonics and electrical devices, etc

    本公司自八十年代初研製生產散熱器系列產品以來，採用國內最先進的生產流水線，工藝精湛，其熱阻特性曲線均按中華人民共和國電子工業部標準st2564 - 85 《型材散熱器》規定的檢測方法，百分之百達到設計要求，是功率半導體器件的配套散熱元件，運用於多種大、小功率電器熱流高密度、整機設備、電子，電器等領域。
  15. In the process of the deposition of the pyrolytic graphite grid ’ s rough, experiment which adopts same discharge and proportion of those gases at different temperature has been done, the test which adopts different discharge and proportion of those gases at same temperature to deposit grid ’ s rough has also been done. at same time, the test which adopts different dilute gases at same technological condition to deposit the grid ’ s rough has been done. in order to obtaining the grid ’ s rough which thickness is able to use, the test has been done at different temperature and depositional time

    在研究過程中，試驗了在不同溫度下採用相同的氣體比例和流量沉積熱解石墨柵極毛坯;還試驗了在相同溫度下，採用不同的氣體比例、不同的流量沉積熱解石墨柵極毛坯;同時，試驗了在相同工藝條件下採用不同的稀釋氣體沉積石墨柵極毛坯;為了獲得厚度合適的石墨柵極毛坯，試驗了不同溫度下採用不同的沉積時間來沉積毛坯;對不同溫度下沉積的毛坯進行了x射線衍射分析、密度分析及晶相分析。
  16. Based on the ncep / ncar reanalysis products, the sea ice concentration data and the observation rainfall data in china, the seasonal, intraseasonal and interannual variations of the atmospheric circulation in the southern hemisphere ( sh ) are systematically analyzed together with their influences on east asian summer monsoon ( easm ). the major conclusions are summarized as follows : ( 1 ) in the lower level of the troposphere, the semi - annual oscillation ( sao ) is most active along 40 s and 65 s in the extratropics of the sh. over these latitudes, the variance percentages of sao exceed 70 %, and the anti - phase variation of the sea level pressure ( slp ) between the two latitudes is primarily caused by their sao components

    利用ncep ncar再分析資料、南半球海冰密度資料及中國臺站降水資料，本文系統分析了南半球大氣環流的季節、季節內和年際變化特徵及其對東亞夏季風的影響，主要結論歸納如下： （ 1 ）對南半球熱帶外大氣環流而言， 40 s和65 s是低層大氣準半年振蕩最為顯著的兩個緯帶，在這兩個緯帶上，半年波的貢獻都超過了70 ，二者季節變化的反位相主要體現為半年波分量的反位相。
  17. Permanent magnet blushless direct current motor ( pmbldcm ) has been paid more attention in the past two decades by researchers in the motor and control system fields because of its excellent performance, for example, small cubage, great power density and high efficiency

    永磁無刷直流電動機體積小，功率密度高，控制性能好，效率很高，在工業、車輛、家電、計算機及軍事等諸多領域得到廣泛應用，尤其在電動車應用領域倍受青睞，是當前電動車電動機研發的熱點。
  18. Current density doubles when the area of effective contact between tissue and electrode is halved, provided that hf current remains contant

    如果高頻電流強度保持不變，那麼人體組織和電極之間的有效接觸面積減半將會使電流密度增大一倍，這將產生四倍的熱量。
  19. Fluid to fluid modeling of chf in round tube

    圓管臨界熱流密度的流體模化
  20. We combined the cvd technique with the pecvd technique by adding a dc or rf electric field to the reacting region of cvd device, and improved the inputting method of reaction gases, then had executed a diamond film growth system. the advantages of our system are : ( 1 ) reaction power, which can enhance the density of the plasma in the reacting region, is supplied with the heat filament and the dc electric field, or with the heat filament and the rf electric field both of them can be controlled precisely and they are complementary to each other

    將熱絲cvd技術與pecvd技術相結合，在薄膜的成核和生長階段分別給反應區再施加一個直流和射頻電場，同時改進反應氣體的進氣方式，製成具有下列兩大特點的金剛石薄膜生長系統： （ 1 ）反應功率由熱絲和直流電場或熱絲和射頻電場共同提供，兩者互相補充，可精確控制，大大提高了反應區的等離子體密度； （ 2 ）能精確控制反應氣體的分佈、流量及流速。
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