unsteady low 中文意思是什麼

unsteady low 解釋
不定流
  • unsteady : adj. 1. 不穩固的。2. 不堅定的；動搖的；易變的，反復無常的，不可靠的。3. 行為古怪的；品行不好的。vt. 使不穩定，使動蕩。adv. -ily ,-iness n.
  • low : adj 1 低的；淺的，矮的。 low flight 低飛。 a low temperature 低溫。 low tide [water] 低潮。 The g...
  1. The results of the experiment show that the synthesized index, unsteady index and steady index inflect the stability margin of the compressor well. and show that the insert - board experiment can get the enough weight in the synthesized index. and also show that the low - press - area of the steady total - press moves along the rotor circumvolving direction

    試驗結果表明，綜合畸變指數，動態畸變指數，穩態畸變指數對壓氣機穩定性有很大作用;同時試驗還表明，插板能夠產生較大的動態畸變指數分量;穩態壓力圖譜低壓區隨著轉子轉動方向轉動;以及其他一些有益的結果。
  2. In order to investigate the unsteady flow frequency domain performances of an axial flow compressor at different mass flow, rotating speed and blade row spacing, plus inlet flow distortion, and considering aerodynamic characteristics and stability of the compressor, the low speed research compressor ( lsc ) at college of energy and power in nuaa is used to carry out the experiment studies. a large amount of test data has been gained through dynamic pressure transducers embedded in the stator blades at the tip, middle and hub section, then fast fourier transform algorithm ( fft ) is applied to calculate the frequency data

    為探討軸流壓氣機在工作流量、工作轉速及動?靜葉排軸向間距變化時的葉片排流場非定常頻譜特性變化規律，並耦合進氣畸變的影響，同時與壓氣機氣動性能和氣動穩定性相關聯，作者利用南京航空航天大學能源與動力學院的低速大尺寸軸流壓氣機（ lsc ）試驗器，採取在靜子葉片表面埋入動態壓力傳感器的實驗方法，對葉尖、葉中和葉根三個截面的動態壓力進行了測量，獲得了大量的可靠的實驗數據。
  3. Especially after the agriculture and rural economical development enter a new period, the low and unsteady income of farmers has contrasted strongly with the heavy burden they are facing

    特別是農業和農村經濟發展進入新階段后，農民低而不穩的收入與沉重的負擔形成強烈反差。
  4. This paper has adopted the low - order surface panel method based on velocity potential to predict the unsteady performance of propeller

    本文採用基於速度勢的低階面元法進行螺旋槳非定常性能的預報。
  5. Flow details of measurement indicate that the coupling of periodic separated flow ( such as low frequency swinging of separation line ) with nozzle flow may cause aft - end internal flow unsteady. recirculation flow gains more energy from the main flow, at the same time the turbulence intensity increases

    通過對測量結果的分析，我們認為分離流動的周期性（如分離線的低頻擺動）與噴管流動相耦合，會造成燃燒室尾部流動的非穩態效應增強，增加了迴流區從主流中獲得的能量，也加劇了流場的湍流脈動。
  6. The unsteady input commercial frequency sinusoidal voltage with high harmonic is modulated into bi - polarity three - state high frequency ac volage by the input cycloconverter, bi - polarity three - state high frequency ac volage is demodulated into uni - polarity three - state spwm wave by the output cycloconverter, and the uni - polarity three - state spwm wave is filter into steady commercial frequency sinusoidal voltage with low harmonic

    輸入周波變換器將輸入不穩定劣質的工頻正弦交流電壓調製成雙極性三態的高頻交流電壓波，輸出周波變換器將此高頻交流電壓波解調成單極性三態spwm波，經輸出濾波后得到穩定優質的工頻正弦交流電壓。
  7. Thirdly, the structure of ejecting in the base region with unmatched pressure ( sebup ) is introduced. the sebup can produce a high average pressure in the laser chamber, while the low pressure which is needed by the active medium is set up locally too. the steady flowfields and the unsteady flowfields in start - up course of sebup are also simulated with cfd method, and the experiment of sebup is made. the

    在本文最後，根據以上研究的結果，提出了「基區非匹配壓力引射結構」 。這一結構的特點是，它能夠在提高光學諧振腔的平均靜壓力的同時，建立出有利於出光的局部低壓區。本文用cfd技術對它的穩態和啟動的瞬態流場進行了模擬，並實施了實驗。
  8. Application of unsteady state conversion process to sulphuric acid production with low - so2 off - gas

    低濃度煙氣非穩態轉化制酸工藝的應用
  9. Scaling analysis of unsteady natural convection flow of a fluid with low prandtl number

    數流體非穩態自然對流流動的標度分析
  10. In order to accelerate the convergence speed, we employ the local time step, and implicit residual smoothing methods. finally, we use this method to get the steady solution of the flow around naca0012 and naca4412 airfoil at very low speed and some basic unsteady solution

    本文對在低馬赫數下繞naca0012翼型和naca4412翼型的定常流場進行了求解，結果和實驗基本吻合，並對非定常運動情況進行了初步模擬研究，得出了一些有意義的結果。
  11. As a result of low heating value and unsteady component, ignition and combustion of municipal solid waste ( msw ) are difficult using conventional methods

    摘要我國城市垃圾有熱值低、成分不穩定等特點，因而按常規方法不易點火和穩定燃燒。
  12. 3. unsteady incompressible euler and navier - stokes equations are solved for two dimensional low - speed flows by the method of pseudo compressibility

    推導了擬壓縮方法二維非定常不可壓euler n - s方程，編寫了二維非定常euler n - s方程計算程序。
  13. The unsteady surface pressures on the rotor blades of a single - stage low - speed axial compressor were measured by means of mounting micro - sensors on the surface the blades

    摘要為了研究上游葉片尾跡對軸流壓氣機轉子葉片非定常表面壓力的影響，採用在葉片表面埋設微型壓力傳感器的方法，測量了一個單級低速軸流壓氣機轉子葉片的非定常壓力分佈。
  14. By using a reynolds - averaged two - dimensional computation, the effect of upstream wake on unsteady separated flow field of downstream adjacent vanes was investigated in low - speed axial compressor

    摘要利用二維數值模擬研究了低速軸流壓氣機上游尾跡對下游相鄰葉排的非定常分離流場的影響。
  15. 4 were calculated in curved tube with permeable arterial wall and effects of parameters, such as shear stress, mass flux of arterial wall, on mass transfer were studied. it was found that steady laminar flow become unsteady with the increase of de. the concentration in inner section of transverse section of the tube is higher than other areas, and with the increase of de and pe, the concentration there increase obviously. it indicates that for the permeable arterial wall, the macromolecules are likely to gather in the areas where axial velocity and shear stress are relatively low, thus indicates why location of atherosclerosis frequently occurs at inner side of curved tube

    4 ，在可滲透邊界條件下彎曲血管內的濃度場分佈，並分析了諸如壁面剪應力及跨壁流量等參數對傳質的影響。計算表明隨著dean數的增加，定常層流開始失穩。血管截面內側區是濃度分佈較高區域，並且隨著dean數和peclet數的增加，內側區濃度明顯增大。
  16. Dc low voltage control circuit is adopted that it is more suitable for the long time work under the unsteady power

    採用直流低壓控制迴路，更適于電壓不穩連續長時間工作，安全性高。
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