旋渦系 的英文怎麼說
中文拼音 [xuánguōxì]
旋渦系
英文
vortices-
Vortex injection provides a form of swirl or cyclone combustion for a rocket engine similar to systems often employed in industrial furnaces.
渦流噴射在火箭發動機中產生一種渦流或旋渦形式的燃燒，與工業爐中常採用的系統相似。Errors and uncertainties multiply, cascading upward through a chain of turbulent features, from dust devils and squalls up to continent - size eddies that only satellites can see
錯誤和不可靠性上升，接踵而來的是一系列湍流的徵狀，從小塵暴和暴風發展到只有衛星上可以看到的席捲整塊大陸的旋渦。There is a curious feature in the spectra of spiral galaxies.
在旋渦星系的光譜中有一種奇妙的特徵。We look face - on directly at the milky way spiral
我們直接面對銀河系的旋渦。The story begins with a local eddy in the swirling gas and dust of the primordial galaxy.
話題要從原始星系的旋渦氣體和塵埃形成的一個局部渦流說起。Spiral galaxies are considered to be gravitationally bound configurations of stars.
旋渦星系被認為是由恆星組成的引力束縛系統。But almost all spiral galaxies are much older than 2 billion years
但是幾乎所有旋渦星系的年齡都超過了20億年。The mystery arises when one considers how a spiral galaxy rotates
當人們考慮旋渦星系是如何轉動的時候難題就來了。New stars are constantly forming out of gas and dust in spiral galaxies
在旋渦星系中不斷由氣體和塵埃形成新的恆星。This spiral galaxy is called m81 which is about 11. 7 million light years away
這旋渦星系名為m81 ，距離我們約有1 ， 170萬光年。Dwarf spiral galaxy
矮旋渦星系Smaller groups of stars called globular clusters often surround spiral galaxies
稱作球狀星團的小型恆星團體經常環繞在旋渦星系周圍。By performing fourier transformation, the relationship between the turbulent intensity of the particle and that of the carrier fluid was obtained which makes clear that particle size, specific gravity, velocity gradient, and the characteristic frequency of energy - containing eddies are four basic influencing parameters. it is proven theoretically that under certain conditions, the stream - wise and transverse particle turbulent intensities exceed those of the carrier fluid. based on the equations of two - phase flow, the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water
通過對細小顆粒在剪切流場中運動方程的fourier分析，得到了顆粒脈動強度和流體脈動強度之間的定量關系，表明顆粒粒徑、顆粒密度、流速梯度以及紊動場含能旋渦的特徵頻率是影響顆粒脈動強度的主要因素，首次從理論上證明了在一定條件下，顆粒在縱、垂向的脈動強度均會超過相應的流體脈動強度，為已有的實測資料提供了合理的解釋。Research on vortices of cross flow past a horizontal square cylinder by piv system
系統研究橫流中水平方柱繞流旋渦特徵Economical operation for industrial centrifugal, mixed flow, axial flow and vortex pump systems
工業用離心泵混流泵軸流泵與旋渦泵系統經濟運行Grand design spiral
宏象旋渦星系Face - on spiral
正向旋渦星系Although the knowledge of wind effects on tall buildings has significantly improved over the last decades, an understanding of the mechanism that the atmospheric flow field to various wind include effects on structures has not been developed sufficiently for formulation of functional expressions. not only is the wind approaching a building complex, but the flow pattern generated around a building is complicated by the distortion of the mean flow field, the flow separation, the vortex formation, and the wake development
在過去的幾十年裡，雖然人們對高層建築風效應的了解已有顯著提高，但對大氣流場與結構物各種風致響應的關系還不能用解析表達式加以描述。由於平均流場的奇變、流動分離、旋渦形成以及紊流的發展，不僅使得流向建築物的風，而且使得繞建築物的流譜變得十分復雜。Spiral galaxies contain both young and old stars. in general, they are brighter than elliptical galaxies
：旋渦星系同時擁有年老和年青的恆星，它們通常比橢圓星系光。After simulating the model of water hydraulic valves, the velocity distribution, pressure distribution, energy distribution can be obtained and relations between the valve channel and the energy loss, the negative pressure distribution can be analyzed, which offers the theory foundation for designing water hydraulic valves with the high efficiency, low energy loss and low noise
通過對水壓閥模型的cfd穩態和瞬態解析，可以得到水壓閥內流場的速度分佈、壓力分佈及能量分佈，據此定性分析流道結構（速度、壓力、流動的分離與再附壁，旋渦的產生與消失等）與能量損失、負壓分佈等的關系，從而為設計出高效率、低能耗、低噪聲的水壓閥提供理論依據。分享友人