unsteady pressure 中文意思是什麼
unsteady pressure
解釋
非定常壓力-
Based on an engineering background, through numerical simulation of the flow field in the hp turbine of the energy efficient engine ( e3 ), the article research the unsteady flow in a transonic turbine stage, the unsteady phenomena in the stage include the shockwave, wake, shedding vortex, endwall vortex, passage vortex and leakage vortex, etc. there are two shockwaves generated on the vane the tailing edge, one on suction side is named moving shockwave, and name another on pressure side steady shockwave
本文首先對于研究的意義和國內外研究的現狀做了簡要的介紹，再從某工程背景出發，通過對e3發動機高壓渦輪內流場的數值模擬，研究了干涉的周期性的問題，以及渦輪級內常見的非定常現象：激波、尾跡、脫落渦、根腳渦、通道渦、漏流渦。導向器尾緣會出現兩道激波，在吸力面的激波可稱為「運動」激波，壓力面的激波可稱為「定常」激波。 -
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。 -
During diagenetic process, the main factor destroying porosity is function of pressure and cementation. secondary porosity formem formed by unsteady mineral is beneficial to formation ' s development
成巖作用中，壓實作用、膠結作用、自生粘土礦物的沉澱是破壞孔隙的主要因素；不穩定礦物溶蝕形成的次生孔隙有利於儲層的發育。 -
Using above methods to solve unsteady pressure distribution, coupling structure equations, the supersonic or hypersonic aeroelasticity is simulated in time - domain
運用上述的非定常氣動力求解方法，耦合結構動力學方程，實現超音速、高超音速氣動彈性的模擬。 -
Through the statistic analysis on the change of the melt gear pump working condition pre - and post - pet plant capacity increasing and concatenate direct spinning process, the reasons for the unsteady running were studied, the modification measures such as lubricating the oil groove with sliding bearing, mechanical sealing of the gear pump, decreasing the gear pump outlet pressure, changing the automatic speed increasing to hand speed increasing were put forward
摘要通過對聚酯裝置增容和後接直紡長絲前後熔體齒輪泵工況變化的統計分析，研究其運行不穩定的原因，提出改造措施，包括滑動軸承潤滑油槽，齒輪泵的機械密封，降低齒輪泵出口壓力，改自動提速為手動提速等等。 -
Unsteady separated flow, produced during the gate - opening period in the reverse radial gate tunnel of a high - lift shiplock, is characterized by negative pressure and high velocity as well as their intense fluctuations in space and time and could easily result in various harmful phenomena such as cavitation, gate vibration and sonic boom, which have been observed and confirmed by prototype and physical model tests
高水頭船閘輸水反弧閥門開啟過程中，后廊道內發生急變分離流，負壓、高速水流以及壓力與流速的劇烈時空脈動變化容易誘發空化空蝕、門振和聲震等有害現象已被原型觀測和物理模型試驗研究證實。 -
The prediction of propeller - induced hull pressure fluctuation in non - uniform flow is studied by using theoretical calculation and model experiment systematically. an intact method and computer program for the prediction of unsteady cavitating propeller - induced hull pressure fluctuation in non - uniform flow is set up in this paper. the measurement of propeller induced hull pressure fluctuation in depressurized towing tank carried out in this paper is the first time inland
本文從理論計算和模型試驗兩個方面系統地研究了不均勻流場中螺旋槳空泡誘導的船體表面脈動壓力的預報問題，建立了一套完整的預報非定常空泡螺旋槳誘導的船體表面脈動壓力的方法和程序，並在國內首次完成了在減壓拖曳水池中進行空泡螺旋槳誘導的船體表面脈動壓力測試。 -
Through the verification calculations on various types of propeller, the numerical method and computer program presented in this paper can give a satisfied result of open water performance of propeller, unsteady forces, pressure distribution of blade surface
通過對各種類型螺旋槳的校核計算，表明本文提出的計算程序在螺旋槳敞水性能、非定常力、槳葉表面壓力分佈等方面均能取得令人滿意的計算結果。 -
On the basis of the theory and knowledge of many learning branches such as fractal geometric, the percolation mechanics, the reservoir engineering, mathematic and physic method, numeric analysis method, compute graphic procession method, software engineering analysis method and so on, this thesis based on the developed research work, concludes the following a few facets to the unsteady seepage flow mathematical models in the pressure - sensitive deformable double media fractal reservoir. fractal geometric theory and method are good approximations to describe the complicity and we can more easily analyze all kinds of the pressure - sensitive deformable double media fractal complex reservoir relatively than others
本文綜合運用分形幾何理論，滲流力學理論，油藏工程方法，數學物理方法，數值計算，計算機圖形處理技術，軟體工程的分析方法等方面的理論知識和應用技術，在已有研究成果的基礎上，對分形油藏作了以下幾方面的研究：一-一- -絲竺絲型進些絲燮竺鯉絲竺塑望絲些些竺色? （ l ）以m厄仃en一root模型為基礎，引入分形參數d了、 0和壓縮系數。 -
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。 -
In this paper, hydromechanical theories, three - dimensional unsteady turbulent finite volume model and pheonics software are adopted to simulate the pressure field and the velocity field of the drainage pipe in allusion to the actuality of the necessary pressurization test before being used. then analyze the computational results and figure out the variational rules of pressure and velocity with different leakage location while close water test or close gas test is applied
本文針對無壓管道交付使用前必須進行嚴密性試驗的現狀，運用流體力學基本理論和三維非穩態紊流的有限體積模型，採用pheonics計算軟體，數值模擬不同管徑下不同漏水點的滲漏情況，模擬閉水和閉氣試驗時管道內部的壓強場和速度場的變化，並分析計算結果，從中找出其變化規律。 -
Comparing with cfd results and experimental dates, the combined engineer method has a practical application and we extend it to solve the unsteady pressure distribution of supersonic or hypersonic aircraft
通過與cfd計算結果和實驗結果的比較證明該綜合工程方法具有較廣的應用范圍，並將其推廣到非定常氣動力的計算。 -
On the rotor blade pressure surface, the dominant frequencies of unsteady surface pressure are the up - stream blade wake passing frequency and its harmonics, and the amplitudes of pressure fluctuations decrease from leading edge to trailing edge
轉子葉片吸力面非定常壓力受葉片附面層和上游葉片尾跡共同影響，其主導頻率為上游葉片尾跡頻率及其倍頻，但是在吸力面前部氣流加速區壓力波動幅度沿流向增大，而在吸力面後部氣流減速區壓力波動幅度沿流向減小。
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