渦距 的英文怎麼說

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。

In chapter 2, a simplified analytical model is presented for the analysis of the bvi mechanism, adopting the beddoes " prescribed wake model. by this model, the azimuthal location and miss - distance of the bvi and the radiation directivity of the bvi noise are calculated and discussed, and some conclusions are obtained

在第二章，使用beddoes預定尾跡模型，建立了一個用於旋翼槳-渦干擾特性機理分析的簡化數學模型，分別對旋翼槳-渦干擾位置、槳-渦干擾距離和聲輻射方向性等進行了計算和分析，得出了有意義的結果。

Because wake vortices can persist in calm air for several minutes ( extending for as far as eight miles ), the federal aviation administration requires minimum distances between aircraft, based on size

機尾渦流可以在無風的空氣中停留幾分鐘，向後延伸達12公里，所以美國聯邦航空總署按照飛機大小而規定了飛機之間的最小安全距離。

In the second chapter, the fluid mechanics principle of vortex flowmeter at first was introduced. the classical theory about vortex flowmeter and the method of computational fluid dynamics about flow around body were expanded on, and the model of the single bluff body and the dual bluff body vortex flowmeter were constructed. and then, fvm - finite volume method - analysis software fluent was applied to analyze the flow phenomenon of flow over single bluff body or dual bluff body

然後通過大量實驗和理論分析給出雙鈍體渦街流量計的設計準則：當管徑為d ，鈍體形狀為三角形，則鈍體設計參數為：銳邊寬度= 0 . 26d ，高度= 0 . 34d ，鈍體之間的距離= 1 . 2d （即當兩鈍體寬度相等且鈍體距離等於單鈍體兩列旋渦之間的距離） 。

Finally, the experiments on the rotor bvi noise are conducted both in an aeroacoustic laboratory and at outdoors, and the noise characteristics at different locations are measured on different blade - tip mach numbers, collective pitch angles and rotor configurations. based on the experimental results, some new conclusions are presented

本文第七章分別在「消聲室」和外場進行了模型旋翼的槳-渦干擾噪聲實驗，對不同馬赫數、不同槳距角以及不同旋翼布置情況下的不同測點進行了噪聲測量，得出了一些新的結論。

So these circuits can be simplified. due to the power output of the electromagnetism vortex water heater has direct relation to the interval between the vortex board and the excitation loop plane

由於熱水器的熱功率輸出跟渦流加熱扳與勵磁線圈平面之間的距離有直接的關系，距離越小則輸出功率越大。

Results show that typhoons had different characters of boundary layer temperature and vorticity fields at different life stages, and the intensity of typhoons was inversely proportional to the distance between warm center and maximum positive vorticity center, that is to say, the smaller the distance, the stronger the typhoon

結果表明：在臺風的不同發展階段，其大氣邊界層相對渦度場和溫度場的結構有著明顯的不同特徵，暖中心與正渦中心的距離與臺風強度為反相關關系，暖中心與正渦中心的距離越小，臺風強度越強。

The hubble space telescope captured the light variation of o e of the cepheids inside the spiral galaxy m100 which is at a distance of 56 million light years away from earth

距離地球五千六百萬光年的旋渦星系m100內，哈勃太空望遠鏡拍得當中一顆造父變星的光度變化

The results show that for all of parameters considered in this study, the friction factor of fin surface without vgs is smaller than that for fin surface with vgs ; the increase of friction factor under low reynolds number is large, but with reynolds number increasing, the increase of friction factor is quite small

實驗結果表明：在不同管間距、板間距時，板芯裝渦產生器阻力系數均比光板板芯的阻力系數大，並且在低雷諾數時的增幅比較大，隨著雷諾數的提高，阻力系數逐漸降低並趨于平緩，且阻力系數增幅大大減少。

Results show that different axial gaps do have obvious effects on optimum clocking positions, and the aerodynamic efficiency benefits vary greatly with different axial gaps

結果發現，葉排間軸向間距對時序效應自身影響很大，會使渦輪效率的變化幅度以及效率極值出現的位置發生明顯變化。

For shutters, the results show : 1 ) according to the formula p =, the theoretical value of is calculated by the effective velocity of the flow, and its engineering value is calculated by the arriving velocity of the flow, the relationship between the theoretical value of and its engineering value is 2 ) the smaller value of declining angle will result in the smaller pressure loss and smaller outlet velocities. as a result, the declining angle of 30 擄 or less is recommended in some places which need small wind velocity, such as broadcasting studio and library, and the declining angle of 45 擄 or less is recommended in places which need big wind velocity, such as cinema and office ; 3 ) the larger value of ratio between the wide of the shutter b and the space between two boards h ( b / h ) will result in the larger pressure loss and smaller outlet velocities. the range of b / h from 0. 8 to 2. 0 and the optimum value 1. 2 is recommended ; 4 ) the range of b from 10 mm to 50 nun and the optimum value 40 mm is recommended ; 5 ) the proper thickness of the boards 8 of the shutters is 1. 5 mm ; 6 ) cuneiform boards should replace the rectangle inlet boards of the shutters in order to obtain better ventilation

數值模擬採用fluent軟體，計算結果用excel進行處理，通過對大量數值工況進行數值模擬計算，結果表明：對于單側百葉風口，計算表明： 1 ）對于公式p = （ ~ 2 ） 2 ，的理論計算值中定義為流體流經百葉風口內部時的速度，即有效速度，而工程上常使用流體的來流速度來計算，計算表明，的理論計算值與工程應用值的關系為（ _ （理論） ） （ _ （工程） ） = 0 . 813 ； 2 ）當來流速度一定時，擋板傾斜角度越小，壓力損失越小、出口速度越小；因此在要求進口風速比較小的場所，如播音室、圖書館等，宜採用擋板角度30的百葉風口；在要求進口風速比較大的場所，如電影院、辦公室等，百葉擋板的角度應選45 ； 3 ）當來流速度一定時，百葉擋板的擋板寬度b與擋板間距h的比值b h越大，壓力損失越大，出口速度越小，計算表明，鑒于壓力損失、出口風速、板間形成渦流區的大小，百葉擋板的b h值取0 . 8到2 . 0之間， b h = 1 . 2為最佳值； 4 ）當來流速度一定時，在計算的條件下，當百葉擋板寬度b = 40mm時，百葉擋板的阻力系數最小，考慮到渦流區等的影響，建議選用10mm b 50mm的百葉擋板；西安建築科技大學碩士學位論文5 ）百葉擋板的厚度取為1 . sinln為好; 6 ）百葉擋板的入口側可選用具有傾斜度的楔形擋板來代替矩形擋板，利用其較好的導流作用，可得到更好的出流效果。

4, the summer rainfall anomaly in northeast china bears close correlation with the atmospheric circulation backgroud. while cold air in middle and high levels of troposphere is active in wet year with the positive anomalies over high - latitude and polar area, the active longwave ridge, the anomalous long - wave ridge in northeast china and inner - mogolia as well as the northward and eastward of the polar vortex, the contrary is in the dry year in northeast china

4東北地區夏季降水異常與大氣環流背景有密切的關系，東北地區夏季多雨年在對流層中、高層冷空氣比較活躍，高緯和極區主要由位勢高度的正距平所控制，貝加爾湖以北的地區長波脊較為活躍，在東北地區和蒙古地區有異常的長波槽發展，極渦位置偏北、偏東；而在東北地區夏季少雨年則容易出現與上述相反的異常環流形式。

2 an f - plane quasi - geostrophic barotropic vorticity equation model of high resolution is designed in this paper in order to investigate the characters of vorticity propagation and the effect of nonlinearity on the propagation within a typhoon circulation, wherein two mesoscale vortices coexist at different radial positions

2設計了一個高解析度的f平面的準地轉正壓渦度方程模式，用以研究兩個徑向距離不等的中尺度渦旋共存條件下，臺風環流內渦量傳播的特徵，以及非線性在此傳播過程中的作用。

The bulge of the barred spiral is elongated like a bar, thus given the name. the galaxy above is m31, a normal spiral only 2, 000, 000 ly away. photo below shows a barred spiral

上圖為m31仙女座大星系，它是一個普通的旋渦星系，距離地球只有二百萬光年，下圖的是一個棒旋星系。

I setted up the physical modele and calculation - domain for the conviction heat transfer enchancement by the longitudinal vortex, and did the numerical value simulation for the chang of the velocity filed and temperature filed which influnced by lvg. at the same time, i studied the generation develepment of the longitudinal and its mechanism for the heat transfer enchancement. by the analycise of the result, i got the pricipium rule of how the size, ratio corner and distence of the lvg have influence on the generation and develepment of longitudinal vortex, and gave out the relative construct parameter scope

通過對phoenics軟體進行應用開發，本文建立了渦旋強化換熱的物理模型和計算域，對擾流元作用下的流動速度場和溫度場的變化進行了數值模擬，研究了縱向渦旋發生發展及其強化對流換熱的機理。初步得出了擾流元的有關結構參數如總體尺寸、寬高比、攻角、間距等因素對渦流發生發展的影響規律，並給出了有關結構參數的取值范圍。

Due to the existence of the eddy and the abrupt bend of the stream line, the pressure on the four faces has the distribution as follow : the lowest pressure appears at several centimeters after the angle point along the top boundary, the highest pressure appears near the center line of the vertical shaft on the bottom boundary, near the angle point, the pressure on the inner boundary decreases with the decreasing height, the pressure on the external boundary decreases slightly in the right - angle region, and increases obviously near the corner

迴流漩渦的存在，以及直彎處流線的急劇彎曲，導致壁面壓力分佈在上表面距彎點一定距離后出現壓力最小值，下表面上，在豎井中心線略偏下游的位置出現壓力最大值，豎井內表面接近彎點處出現壓力沿程降低的現象，豎井外表面壓力在進入直彎后先是沿程略有降低，在直彎角落處又明顯升高。

With present broadband spectrum forcing added on the inflow there still exist large vortex pairing processes in the mixing layer with high convective mach numbers, although the rolls up of large vortex need much longer spatial developing distance

在本文的入口寬帶擾動下，高對流馬赫數下二維混合層中仍然存在大渦的對並過程，只是大渦的捲起需要更長的空間發展距離。

Yuyao ruixin medical appliance co., ltd is specialized in manufacturing high - speed dental turbine handpieces. it is located in a beautiful city with mountains and rivers - yuyao in zhejiang province, which enjoys convenient transportation because it is 100km away from hangzhou and 40km away from ningbo

餘姚市瑞鑫醫療器械有限公司是專業生產牙科高速氣渦輪手機的企業，位於風光秀麗的山水城市浙江省餘姚市，距杭州100公里，距寧波40公里，交通十分便捷。