電弧加熱流 的英文怎麼說
中文拼音 [diànhújiārèliú]
電弧加熱流
英文
arc-heated flow-
Test results indicated : with the hoist of altitude, the increase of ice amount and the rise of pollutant, the average flashover voltage reduced. the character exponent generally depends on the insulator profile, ice amount, ice state and pollution severity etc. by means of a high - speed camera, a data acquisition system and high voltage test facilities, a series of the flashover processes on ice surfaces were record. the experimental results form this study and the subsequent theoretical analyses suggested : the thermal ionization of the air in front of an arc root resulted in arc movement ; the electrostatic force had an auxiliary effect of impelling arc propagation ; the electrical
通過對攝像機、數據採集系統及高壓試驗裝置記錄覆冰絕緣子表面閃絡電弧的發展過程的試驗結果進行理論分析得出：弧根周圍空氣的熱電離導致了電弧的發展，靜電場力對電弧的發展起到了加速作用，電擊穿僅發生在閃絡最終的跳躍階段；通過測量閃絡過程中的放電電壓、泄漏電流、閃絡時間、覆冰水電導率、電弧長度及電弧半徑等參數，得到了不同階段電弧（電弧起弧階段、電弧發展階段及完全閃絡）的發展速度、臨界電弧長度均隨覆冰水電導率的增加而減小。Much works has been distributed to the development of a vacuum system to simulate the outer space and a measurement system to test the arcjet performance. ignition experiments in various operational modes have been done with argon as propellant. macroscopical working parameters including thrust, mass flow rate, voltage, current, inlet pressure and vacuity are obtained by the test measurement system and actual performance parameters including specific impulse, thrust efficiency, ratio of thrust and power and ratio of power and mass flow are calculated
以氬氣作為推進劑，在不同工況下進行點火實驗，測量獲得了其工作推力、電弧電壓和電流、推進劑流率和弧室壓力等宏觀參數，得到了不同實驗條件下其工作的實際比沖、推力效率、推力/功率比以及比功率等性能參數，分析了推進劑質量流率、電弧功率、電弧加熱發動機電弧室結構尺寸等因素對其性能的影響，為數值模擬研究和實際的低功率電弧加熱發動機優化設計及研製提供了實驗基礎。In the research of water arcjet, serious oscillation existed in jet and arc voltage was found and it led to unstable work state of arcjet
目前對水電弧加熱的研究過程中，發現水電弧加熱發動機羽流和弧電壓存在強烈的脈動，不能穩定工作。Our research found that, the main reason which led to the oscillation of jet and arc voltage was the oscillation of propellant flowrate. the oscillation of flowrate was caused by the oscillation of water evaporation in pipes
本文的研究發現導致水電弧加熱發動機羽流和電壓脈動的主要原因為推進劑流量供給的脈動，而供給流量的脈動是由於水在管內汽化的脈動引起的。This paper presents the effects of some features on the productivity of raw c60 materials, such as distance and approaching speed of electrodes, helium partial pressure and arc current etc. then we separate and purify the raw materials and obtain pure solid c60 of 99. 9 % and compare the purification efficiency and effect of different fluxion phase and fixed phase and discuss the effects of the experimental conditions, such as the depositing speed, the type of the substrate, the surface structure of the substrate and the temperature of the substrate. finally, we use xps, afm, ultraviolet, infrared and raman to analyze the component, structure and feature of the films qualitatively and quantitatively
本文首先研究了氦氣分壓、弧電流大小、電極間距以及電極推進速度等實驗條件對制備c _ （ 60 ）粗品產率的影響；接著選用柱色譜法分離提純得到了純度大於99 . 9的c _ （ 60 ）固體，比較了不同流動相和固定相的提純效率和效果；然後採用自己改進后的真空鍍膜機，利用電阻式加熱蒸鍍方法，得到了純c _ （ 60 ）薄膜和不同摻雜比的銀摻雜薄膜；探討了沉積速率、襯底種類、襯底表面結構以及襯底溫度等實驗條件對薄膜結構的影響；最後通過xps ， afm ，紫外，紅外，拉曼對薄膜的成分、結構和特性作了定性和半定量分析。The two - dimensional axisymmetric subsonic - transonic - supersonic flow in an experimental arcjet thruster is simulated numerically using flux vector splitting method. the profiles of density, velocity, temperature, pressure and mach number can be obtained by the computation. the computation grid and some computed results are given here. the test equipment such as power supply system, ignition system, propellant supply system, arcjet thruster, thrust measuring device and vacuum system are introduced briefly. some working phenomena of the arcjet are observed and discussed. three different kinds of instability appeared in the process of the experiments. except some important parameters are measured, it is found that the operating stability of argon is better than that of nitrogen
對一實驗電弧加熱式發動機二維軸對稱亞跨超音速流動進行了數值模擬，所採用的方法是矢通量分裂演算法.通過計算可以得出密度、速度、溫度、壓力和馬赫數的分佈.給出了計算所使用的網格和一些計算結果.簡要介紹了實驗所使用的設備，如電源系統、點火系統、推進劑供給系統、電弧加熱式發動機、推力測量裝置和真空系統.對所觀察到的一些工作現象進行了討論.有三種不同的不穩定性出現于實驗過程.除了所測量的一些重要參數，通過實驗發現氬比氮工作更穩定The two - dimensional axisymmetric subsonic - transonic - supersonic flow in an experimental arcjet thruster is simulated numerically using flux vector splitting method
摘要對一實驗電弧加熱式發動機二維軸對稱亞跨超音速流動進行了數值模擬，所採用的方法是矢通量分裂演算法。When the welding current is added, the quality of heat of the arc will increase, so both the volume of molten puddle and the depth of arc crater will all increase, and the weld depth will increase when the weld is cooling
焊接電流增加時，電弧的熱量增加，因此熔池體積和弧坑深度都隨電流增加，所以冷卻下來后，焊縫厚度就增加。This machine adopts high - level siemens plc concentration control, set up with computer controlled gear shifting vacuum gauge, and a three - flow controller, one set of contra - variant bias power and four - route contra - variant arc power supply, four side - installed heating tubes, computer pid automatic temperature control device, 60 and 100 two kinds versatile arc supply
該設備採用先進的西門子plc集中控制，裝有電腦自動換檔真空計和三路流量控制器，一套逆變偏壓和四路逆變弧電源，邊裝式加熱管四支，電腦pid自動控溫， 60和100兩種弧源通用。The influence of parameters such as mass flow, input power, and constrictor size on arcjet performance is also analyzed. this work provides an experimental foundation for the numerical simulation study and optimized design of arcjet. a high - speed, high - resolution, multi - line spectroscopic diagnostic system has been improved to diagnostic the excitation temperature of arcjet plume
本文優化並改進了一套高速、高精度的多譜線電弧等離子體光譜診斷系統，使其適用於電弧加熱發動機羽流激發溫度的診斷，並利用該系統診斷了發動機出口羽流的非平衡程度和溫度沿徑向的分佈。This machine adopts japanese pro - face touch screen and mitsubishi plc control technology. in addition, it is set with automatic gear - shifting vacuum gauge, a two - flow controller, side - installed heating tube, computer pid automatic temperature control, and 32 sets contra - variant arc power supply and contra - variant bias power. they are widely used in plating different thick film layers of mono - metal and many compound film layers
該設備採用日本pro - face觸摸屏和三菱plc集中控制裝有電腦自動換檔真空計，兩路流量控制器，邊裝式加熱管，電腦pid自動控溫，配備32隻逆變式弧電源和逆變偏壓，適用於鍍制各種特種單金屬厚膜層或多鐘金屬復合膜層。分享友人