氣體分佈管 的英文怎麼說
中文拼音 [qìtǐfēnbùguǎn]
氣體分佈管
英文
gas distribution tube-
Gis ( geographic information system ) was developed from 1960s ". it integrates the data collection, storage, management and analysis. it can describe the information of earth surface ( including aerosphere ) and the spatial information of space and geography distribution
地理信息系統( gis )是60年代發展起來的一種集數據採集、存儲、管理、分析於一體,並能夠描述地球表面信息(包括大氣層在內)以及空間、地理分佈相關數據的空間信息系統。The bacteri of strain tl2 were found to be mainly distributed in the intercellular space of sclerenchyma in the root, the intercellular space of collenchyma and vascular bundle in the stem, the stomatal apparatus, the intercellular space of epidermal cell, collenchyma and endodermis in the leaf
其菌體主要分佈在根部厚壁組織的細胞間隙,莖部厚角組織的細胞間隙、維管束等組織的細胞間隙、葉片的氣孔器附近、上下表皮細胞間隙、厚角組織細胞間隙以及內皮層組織細胞間隙等。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。Began with introducing the stomatic cubage of paper capillary and absorption to liquid of paper capillary, a method to study the distribution of paper ' s capillary is advanced, and based on that, the penetrating phenomena and penetrating depth are analyzed
摘要基於紙張毛細管氣孔的容積和紙張毛細管對液體的吸收等,提出了研究紙張毛細管分佈的一種方法,並在此基礎上,分析了油墨的滲透現象和滲透深度。In this thesis hydraulic experimental studies and theoretical analyses on the vortex - flow drop shaft were conduced and the following results were accomplished : ( 1 ) in the model test some hydraulic characteristics including the shape of air core in the center of the drop shaft, the radial distribution of water flow velocity and the distribution of pressure on the wall of the drop shaft were measured under the condition of high water head above 250m and large discharge above 1400m3 / s. ( 2 ) a kind of computational method for the spiral water flow in the air core region of drop shaft was discussed and applied and the results agree the experimental data well. ( 3 ) the total ratio of energy dissipation in the drop shaft can reach 90 % and the energy dissipation in every region was discussed quantitatively
本文通過試驗研究與理論分析對旋流式豎井泄洪洞應用於高水頭、大泄流量情況時存在的一些水力學問題進行了研究和探討,取得以下主要成果:一、結合小灣工程導流洞改建,對高水頭( 252m ) 、大泄流量( 1400m ~ 3 s )條件下旋流式豎井中的水流運動特徵進行了比較全面的測量,包括空腔形態、徑向流速分佈及井壁壓強等;二、提出了豎井空腔段螺旋水流水力計算方法,其計算結果與實測值吻合良好;三、利用試驗與計算結果,對旋流式豎井的消能機理進行了探討,對豎井各部分的消能能力有了總體認識;四、對豎井下部消力井的合理井深進行了優化試驗研究,發現消力井合理深度為0 . 9d左右;五、通過試驗研究,歸納出豎井水流總摻氣量估算方法,為導流洞排氣方案的設計提供了參考依據;六、在高水頭、大流量條件下,豎井空腔段下部流速很高,盡管水流螺旋運動引起的離心力可以確保井壁壓強保持正壓,但空化數依然較低,因此豎井的空化空蝕始終是工程界關注的重大問題。2. using cfd software - fluent, many flow states were been simulated. these states are the influence of nozzle structure with the flow, the distributing characteristic of inside flow, the influence of cold gas flow and outside flow with the work of the nozzle, the change of inside pressure load when the nozzle regulates
2 、藉助cfd軟體fluent ,計算出可調噴管本身結構對流動的影響、可調噴管流場的參數分佈、冷卻氣流對噴管流動的影響、外流對可調噴管內流的影響、噴管的冷流流場和噴管調節過程中內壁面的壓強載荷變化。A reasonable position of driving nozzle helps to achieve the maximum material flow that also depends on other parameters such as backpressure, properties of conveyed material and driving gas. it is observed that, an increase of convergent section angle is harmful to the pneumatic conveying system, and also influences on the mass flow rate of conveyed material, the distribution of static pressures in injector and the pressure drops of conveying pipe. in addition, within a reasonable scope of air mass rate, increasing the driving jet velocity is more advantageous than enlarging the dimension of driving nozzle
試驗研究發現,氣體噴嘴位置對氣固噴射器的輸送能力影響最大,氣體噴嘴存在某一最佳位置,而這一最佳位置與背壓、輸送物料特性和輸送風特性相關聯;氣固噴射器的收縮角對其輸送能力、內部靜壓分佈和輸送管阻力特性均有適量影響,收縮角增大對整個輸送系統均不利;在適當的輸送風范圍內,提高氣體噴嘴出口速度比擴大氣體噴嘴尺寸更為有利,但氣體噴嘴出口速度過高會增加氣固噴射器和輸送管內的能量損耗,給輸送帶來不利的影響;系統背壓與氣固噴射器的氣體噴嘴出口速度的選取有關。The gas field in pemfc means the gas distribution in gas source, gas inlet tube ( scale of m ), gas - blower, gas manifold ( scale of cm ), channel ( scale of mm ), diffusion layer ( scale of um ), hydrophobic layer and catalyst layer ( scale of nm ). the aim of changing the scales is to make oxygen reach reaction area as evenly as possible
Pemfc的氣場指在氣源、進氣管(分米級) 、風機、進氣箱(厘米級) 、流道(毫米級) 、擴散層(微米級) 、疏水層(亞微米級) 、催化層(納米級)中的氣體分佈,每一級尺度的變化是為了氣體的進一步均勻化。Analysis is made on structure characteristics of the finned - tube, and analysis has been made on the special heat and mass transfer principle of every micro - unit under both dry and wet conditions. appropriate hypothesis is made and based on the energy, mass and momentum equivalent, the evaporator models of dynamic distributed parameters are set up. in addition, the gascooler and internal exchanger models of dynamic and distributed parameters, the throttling valve models and the compressor models are set up, too
本文的內容如下: 1對翅片管蒸發器的結構特點進行分析,選取適當的微元體,對于干、濕工況下每個微元分別進行傳熱傳質分析,通過適當的假設,利用質量守恆方程、能量守恆方程和動量守恆方程建立了蒸發器的分佈參數數學模型;對回熱器劃分微元建立了分佈參數數學模型;對氣體冷卻器建立了分佈參數數學模型;對壓縮機建立了數學模型;建立了節流閥的數學模型,為系統模擬奠定了基礎。Analysis of gas temperature radial distribution in neh2cubr laser discharge tube with diaphragms
隔環結構的neh2cubr激光放電管氣體溫度徑向分佈The research on vertical conduit flow of gas - liquid two phases in wellbore aims at the classification, transition and judgement of flow pattern, according to the pressure distribution of oil - gas - water mixture in wellborne, by which the reliable basis will be provided for understanding of well performance, rational control / monitoring and regulating of well flow regime and the design of gas lift
摘要井筒兩相管流研究的主要目的是用於井筒內流體流型的劃分和流型的轉變與判斷,其基本依據在於井筒內油氣水混合壓力的分佈狀況;在了解了井筒混合流體的壓力分佈狀況之後,能夠為掌握油井生產規律、合理控制和調節油井式作方式及氣舉設計提供可靠的依據。In this paper, the characteristic of ecological distribution of the order aulonoraphidinales has been discussed. the result showed that the characteristic influenced by regional climate and situation is not notable, but the influence from located water body is relatively obvious, the number and quantity of those species is richer in temporary water body, seep water beside lake and marsh, yet less in brook, river, lake and other water body
發現管殼縫目硅藻的分佈受區域氣候、地理位置等的影響並不顯著,而受所處水體的小環境的影響較為明顯,在臨時性水體以及湖邊滲出水、沼澤中管殼縫目硅藻的種類多,數量也多;而在溪流、河水、湖水等水體中種類和數量都很少。( 3 ) the most principal factors that influence the supersonic atomization process include the flow ratio of the gas - liquid metal ( gmr ) value, the flow of atomizing of gas and the range of the inverse vortex taper. the more of the value of three factors, the more advantage they are for the atomization and the more fine the powders are. ( 4 ) the produced powders are the best in efficient atomization efficiency, particle diameter, particle shape and dispersion when the solder alloy is zhl63a, atomizing medium is n2, the protrusion h = 6. 0mm, atomizing gas pressure p = 100mpa, over - heat temperature t = 167 ( t = 350 )
研究結果表明: ( 1 )超音速霧化器的氣體流場在導液管下端形成一個倒渦流錐,在二維空間上呈軸對稱的雙峰分佈,負壓形成於這個倒渦流錐內; ( 2 )修正後的霧化氣體速度公式可以滿足超音速霧化的要求; ( 3 )影響超音速霧化工藝最根本的因素有氣液質量流率比( gmr )的大小、霧化氣體流量和倒渦流錐范圍,三個因素的值越大,對形成細粉越有利; ( 4 )在焊錫合金為zhl63a ,霧化介質微n _ 2 ,導液管突出高度取h = 6 . 0mm ,霧化氣體壓力取p = 1 . 0mpa ,合金過熱度取t = 167 ( t = 350 )時,所制得的粉末在有效霧化率、顆粒球形度、粒度及其離散度三個方面綜合性能最好。Combination effect of nozzle gas distributor and particle properties on gas - solid flow behaviors in cfb risers
噴管型氣體分佈器和顆粒物性對提升管內氣固兩相流動行為的聯合影響The size of the nanoparticles prepared with the flow - levitation method can be controlled by controling the gas pressure in the action tube, the velocity of cooling gas flow and the temperature in the melt metal globule
自懸浮定向流方法制備納米鋁粉和銅粉的過程中,通過控制反應管內的氣體壓力、冷卻氣體的流速、熔球的溫度等因素可以對粉體的尺寸分佈進行控制。The surface of acini was not smooth and was found for the first time that lots of trachea extended gradually on it, which provide oxygen needs for various physiological events of this organ
首次發現長角血蜱腺泡表面呈非平滑狀態,有大量的氣管分佈並逐漸分支深入到腺體內,為唾液腺生理活動提供氧氣需求。The permitted total emission equivalent quantity of urban air pollutants and its distribution in urban area, which can be used as regional air pollution control index and can be allocated to each major pollution source as its limit of emission quantity, can be worked out by using linear programming model based on regional grid air pollutants transfer matrix which considers the difference of functional regions and the justice of the permitted emission ' s distribution
通過將區域劃分為不同的功能區和管理小區,構造區域間大氣污染物轉移矩陣及利用線性規劃模型來確定城市大氣污染物允許排放當量及分佈,並以此作為區域控制指標分配至污染源,充分體現環境功能區差異和容量分配的公平性。A mathematical model of flows in the substrate was established using the equivalent continuum approach, and multi - dimensional numerical simulation of the steady flows in the catalytic converters was performed. simulation results show that the separation and vortex, which cause the pressure loss and the velocity non - uniformity at the front of the first substrate, are generated near the wall of the conical pipe. in addition, the larger the inlet cones angle the more the pressure loss and maldistribution in converters, however, when the angle enlarges enough the pressure loss would be decrease
結果顯示氣流在擴張圓錐管壁附近出現分離產生較強的擾動,造成局部流動損失和載體前氣流速度沿徑向分佈不均勻;入口擴張管結構對催化器的流動特性有很大影響,但並非擴張角越大,催化器流速武漢理工大學碩士學位論文分佈的不均勻性和壓力損失也增大,而是存在著一個最佳角度,但當擴張角增大到一定程度以後,擴張角對流速分佈和壓力損失的影響變小。The results indicate that the flow velocity is lower and the pressure is high in majority of the step cylinder, the distinct variations of the flow field occur in the threshold of the step cylinder at the bottom and the abrupt transition sections, the holes in the inner and outer tubes and the exhaust hole
結果表明:步進缸內大部分區域流體流速較小,壓力較高,且變化不大,發生明顯變化的部位主要分佈在步進缸底部水管入口及截面突變處、內外套對孔處和排氣孔處。分享友人