難燃燒體 的英文怎麼說

中文拼音 [nánránshāotǐ]
難燃燒體 英文
hardcombustible component
  • 難 : 難Ⅰ形容詞1 （做起來費事的） difficult; hard; troublesome 2 （不容易; 不大可能） hardly possible 3...
  • 燃 : 動詞1. （燃燒） burn 2. （引火點著） ignite; light
  • 燒 : Ⅰ動詞1 （使東西著火） burn 2 （加熱或接觸某些化學藥品、放射性物質等使物體起變化） cook; bake; hea...
  • 體 : 體構詞成分。
  • 燃燒 : （物質劇烈氧化而發光、發熱; 燒） burn; kindle; flame; set on fire; [化學] combustion; inflammation; ignition
  1. Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece

    將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義
  2. 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。
  3. These concrete works are the following : 1, a new heterogonous shs model had been proposed, which first included all the relative materials characters, such as reactants particle sizes, changeable heat - conductivity and mass diffusion during shs and so on, and its chemical reaction characters, initial combustion status

    具體工作如下： 1 、提出了微觀不均勻的燃燒介質模型，在此基礎上完成了對非均質燃燒模型數學化的研究，並提出了「燃燒基團」模式，解決了模型數學分析量大的難點。
  4. Streak after streak of light shot across the sky as tiny bits of comet debris burned up harmlessly in the atmosphere

    無數的彗星碎片在大氣中燃燒，於是人們看到了一顆顆流星從空中劃過的壯觀景象，這些體積不大的彗星碎片的燃燒不會給人類帶來災難。
  5. Patty ronney, 49, said she had never seen a single meteor before leaving home. streak after streak of light shot across the sky as tiny bits of comet debris burned up harmlessly in the atmosphere

    無數的彗星碎片在大氣中燃燒，於是人們看到了一顆顆流星從空中劃過的壯觀景象，這些體積不大的彗星碎片的燃燒不會給人類帶來災難。
  6. Unfortunately, the solid propellants ? usually aluminum fuel and ammonium perchlorate oxidizer ? burn fairly inefficiently, are toxic to the environment, and are difficult to fabricate and handle safely

    然而固體推進劑（通常是鋁燃料和過氯酸銨氧化劑）燃燒效率頗低、對環境有害，而且很難安全地製造和操作。
  7. More often than not the combustion noise refers to the noise radiated from the cylinder cap, piston, rod, crankshaft to the engine body propelled by the pressure vibration generated out of the combustion inside the cylinder

    燃燒噪聲和機械噪聲很難嚴格區分，通常將由於氣缸內燃燒所形成的壓力振動通過缸蓋、活塞-連桿-曲軸-機體向外輻射的噪聲稱之為燃燒噪聲。
  8. It is very difficult to research the burning characteristic of high energy propellant in the ddt pipe applying the ionization probe. but the satisfactory results can be easily got using photoelectricity triode

    用探針法研究ddt管中高能推進劑的燃燒波和爆轟波的傳播特性，因各種因素的影響難以得到滿意的結果，用光電三極體代替電離探針可得到相對理想的結果。
  9. Numerical simulation by cfd was carried out to understand the hot current behavior in a tunnel with longitudinal ventilation. it becomes clear that fire source modeling is very important because the hot current behavior is strongly affected by the fire source position and is sensitive to methods in the modeling of the fire source. the flame area which has developed from the fire source is an area of chemical reaction caused by combustion. even if grids in the vicinity of the fire source are made fine, it was difficult to simulate the heat generation area with consideration to this chemical reaction through using a method for setting the heat release rate simply on the fire source surface. therefore, we proposed a method adopting the knowledge on flame shape under the longitudinal ventilation and incorporating it into numerical simulation and it showed a good agreement with the experimental results. it was shown through experiments in a tunnel with longitudinal ventilation that the hot current developed toward the tunnel center downwind from the fire source near a wall. the cause was investigated by numerical simulation and it became clear from the results that the spiral air by the fire plume created a vortex in the crevice between the wall and the plume

    運用cfd進行數字模擬，以了解縱向通風隧道內熱煙氣流的特性.通過模擬發現對火源進行模擬非常重要，熱煙氣流特性受火源位置的影響很大，並且對火源模擬方法很敏感.火源生成的火焰區是燃燒引起的化學反應區域.即使火源附近的木垛排列完好，也很難在考慮這些化學反應條件下模擬熱生成區域.建議考慮縱向通風隧道內火焰形狀並對它進行數字模擬.模擬結果與試驗結果非常吻合.試驗證明，在縱向通風隧道內，熱煙氣流從靠近墻體火源處順風向隧道中心蔓延.數字模擬結果發現，火災羽流造成的螺旋上升空氣會在墻體和羽流之間形成一個渦流區
  10. Abstract : numerical simulation by cfd was carried out to understand the hot current behavior in a tunnel with longitudinal ventilation. it becomes clear that fire source modeling is very important because the hot current behavior is strongly affected by the fire source position and is sensitive to methods in the modeling of the fire source. the flame area which has developed from the fire source is an area of chemical reaction caused by combustion. even if grids in the vicinity of the fire source are made fine, it was difficult to simulate the heat generation area with consideration to this chemical reaction through using a method for setting the heat release rate simply on the fire source surface. therefore, we proposed a method adopting the knowledge on flame shape under the longitudinal ventilation and incorporating it into numerical simulation and it showed a good agreement with the experimental results. it was shown through experiments in a tunnel with longitudinal ventilation that the hot current developed toward the tunnel center downwind from the fire source near a wall. the cause was investigated by numerical simulation and it became clear from the results that the spiral air by the fire plume created a vortex in the crevice between the wall and the plume

    文摘:運用cfd進行數字模擬，以了解縱向通風隧道內熱煙氣流的特性.通過模擬發現對火源進行模擬非常重要，熱煙氣流特性受火源位置的影響很大，並且對火源模擬方法很敏感.火源生成的火焰區是燃燒引起的化學反應區域.即使火源附近的木垛排列完好，也很難在考慮這些化學反應條件下模擬熱生成區域.建議考慮縱向通風隧道內火焰形狀並對它進行數字模擬.模擬結果與試驗結果非常吻合.試驗證明，在縱向通風隧道內，熱煙氣流從靠近墻體火源處順風向隧道中心蔓延.數字模擬結果發現，火災羽流造成的螺旋上升空氣會在墻體和羽流之間形成一個渦流區
  11. The research indicated that, if the secondary combustion chamber was looked on as a controlled object, with the adjusting valve as a input, the pressure and the temperature of a selected point on the inside wall of the combustion chamber as outputs, then such controlled system would be a strongly non - linear, time varying system with number of random disturbances, which resulted in huge difficulty to build an analyzed mathematics model for the spray burning of the liquid fuel, so that classic control methods were all invalid

    研究表明，若將rbcc發動機的二次燃燒室視為一個控制對象，同時以燃燒室內壁面取定點處的壓強、溫度和調節閥的開度為輸入輸出變量，則該系統將是輸入?輸出特性非線性很強、隨機干擾嚴重的復雜時變系統。這導致建立燃油噴霧燃燒具體模型的很大困難，從而宣告了經典控制方案的失效。
  12. With the rapid development of computational fluid dynamics and combustion theory, applying the computer to numerically simulate the complicated processes in the plasma ignition is possible. using numerical simulation can estimate the parameters which are not essay to measure and not doing so many experiments can improve its reliability and reduce the cost. so numerical simulation is a new pattern way to study the inner mechanism of the plasma ignition

    隨著計算流體力學和燃燒理論的發展及計算機的廣泛應用，用數值模擬等離子點火器內部燃燒系統流動、傳熱、傳質、化學反應等復雜的過程已成為可能。應用數值模擬的方法可以對實驗難以測量的量進行預估，而不需要大量的試驗，應用數值模擬的方法來解決等離子點火器燃燒性能的分析和工程設計，有利於提高工作的可靠性和經濟性。
  13. ( 1 ) the cfd model for the pulse combustion spray drying process. the computational fluid dynamics ( cfd ) based on the two - phase flow theory was employed in this paper, which used the standard k - e model and the particle trajectory model to simulate the gas - particle flow in the drying chamber. the momentum, heat and mass transfer regarding both gaseous and particulate phases during the spray drying inside the drying chamber was also revealed

    為解決這一難題，本文利用氣體一顆粒兩相流理論和計算流體力學（ cfd ）技術，建立了更符合實際噴霧乾燥過程的數學模型即噴霧乾燥的cfd模型，並進行了脈動燃燒噴霧乾燥過程模擬，其主要內容如下： （ 1 ）建立了脈動燃燒噴霧乾燥的cfd模型該數學模型建立在氣體一顆粒兩相流基礎之上，用標準k -模型預測乾燥室內的氣體湍流運動過程，顆粒軌道模型追蹤乾燥室內顆粒群的運動軌跡，熱質傳遞模型描述空氣和液滴的熱質傳遞過程。
  14. There are great differences between ground test of a flight vehicle ' s aerodynamics and that of a dual - mode scramjet when ground test facilities are used to do experiments on a dual - mode scramjet engine, the components of incoming flow and its parameters, including total pressure, total temperature ( or total enthalpy ) and velocity must be simulated. at the same time, since the fuel ' s resident time within a combustor is very short, on the order of one millisecond, it is difficult to measure the flow - fields

    進行雙模態沖壓發動機地面試驗研究時，必須要求試驗設備能模擬實際飛行條件下來流氣體的組分、總壓、總溫（或總焓）以及來流氣體的流動速度；同時由於燃料在燃燒室內駐留的時間很短，一般為毫秒量級，從而使流場物理量的測定顯得非常困難。
  15. The chemical reactions in the flame area are very complex. it is very difficult to measure the number density distribution of the particles ( atoms, ions and molecules ), so the relative intensity method is employed

    由於固體推進劑燃燒區內發生的化學反應非常復雜，直接測量火焰區內的粒子（原子、離子以及分子等）數密度比較困難，因此選用相對強度法來進行計算。
  16. Liquid propellant combustion processes are quite complicated and defy precise analytical description.

    液體推進劑燃燒過程是相當復雜的，很難對其進行嚴謹的分析描述。
  17. Because of complicated variety and uncertainty in city solid waste, it is difficult to implement sufficient incineration, and also secondary pollution will be produced

    摘要由於城市固體垃圾的復雜多變性及不確定性，難以實現對垃圾的充分燃燒，常因控制不當而產生二次污染。
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