vortex frequency 中文意思是什麼

vortex frequency 解釋
渦旋頻率
  • vortex : n. (pl. vortexes,-ti-ces )1. 旋渦;旋風;旋卷行雲。2. 【物理學】渦旋;【航空】渦流;【動物;動物學】〈V-〉 單腸渦蟲的一屬。
  • frequency : n. 1. 屢次,頻仍,頻繁。2. (脈搏等的)次數,出現率;頻度;【物理學】頻率,周率。
  1. There are low frequency vortex moves northward at low - latitude and southward at mid - latitude ; there are low frequency vortex moves northward at low - latitude and southwestward at mid - latitude in flood years, it ' s easily to bring on convergence or divergence in large - scale and heave rainfall

    ( 3 )澇年低頻olr在經向上同時存在由低緯度向北和由中高緯向南的傳播,二者交匯在20 30 n之間。旱年則沒有顯著的匯合區。
  2. This is because that frequency shift can also be found in the wind vortex over the arctic ocean, u - wind in beaufort sea, v - wind in east siberian sea and the pdo index

    因此,除熱力因素外,動力因素引起的海冰的平流與該變頻現象也存在一定的聯系。
  3. It is found that the couple of foppl vortex is unstable from the beginning when it engendered. the changing frequency is very slow at first, almost 2. 5 % ~ 3 % of the frequency when it is stabled. the amplitude is also so limited at the beginning the maximum is only about 0. 035 % ~ 0. 05 % of the amplitude when it develops fully

    ) ppl渦對從產生的一瞬間就是不穩定的,其初始變化頻率十分緩慢,初始變化頻率大約是周期變化穩定以後變化頻率的2 . 5 3左右;波動幅度也十分有限,其初始階段最大值僅為周期性充分發展幅度的0 . 035 0 . 05左右。
  4. The results indicated that the generation of trailing - vortex of downstream adjacent vanes could be restrained effectively by upstream wake when the passing frequency and the amplitude of wake defect satisfy some conditions, associated with a significant enhancement of time - averaged aerodynamic performances : loss coefficient reducing 40. 2 % and the ratio of loading coefficient and loss coefficient increasing 93 %

    研究表明:滿足一定通過頻率和虧損幅值條件的尾跡能夠有效抑制下游相鄰葉排尾緣渦的生成,達到控制或是推遲附面層非定常分離的目的,從而使得流場時均性能大幅度的提高,損失系數降低了40 . 2 % ,功損比增加93 % 。
  5. At large attack angle the frequency of the vortex has n ' t a apparent zone of " lock - in ". the fluid - induced vibration at large attack angle belongs to the stable dynamic response problems. but a sudden skip of amplitude will occur at large inlet velocity

    在大攻角下分離渦脫落的頻率沒有一個明顯的頻率鎖定區域,流體振動屬于穩定的動力響應問題,但在大來流速度下會出現振幅突跳的現象。
  6. Firstly, the airfoil ' s classic flutter ( at small attack angle ), stall flutter ( near the static stall angle ) and response ( at large attack angle ) are analyzed. it is found from the numerical results that " lock - in " will occur at certain freestream velocity range near the static stall angle, where the frequency of the vortex will be equal to the natural frequency and the flutter has the characteristic of self - induced oscillation. when the attack angle is far from the static stall angle, the vortex will have its own frequency, which differs from the natural frequency, and the flutter has the characteristic of forced oscillation

    首先研究了二維翼型的古典顫振(小攻角) 、失速顫振(失速攻角)和動力響應問題(大攻角) ,得到以下結論:在靜態失速攻角附近的一定來流速度范圍內,分離渦會發生頻率鎖定現象,分離流的頻率與固有頻率趨于相同,這時的振動呈現自激振動的特點;遠離失速攻角時分離流頻率則擺脫固有頻率的影響,此時的振動具有強迫振動的特點。
  7. Because vortex flowmeter has no movable mechanical parts, the output signal of it is a frequency signal that is proportional to flow signal, and it has less pressure loss, wider measurement range, it is used widely

    由於渦街流量計具有無機械可動部件,可得到與流量成正比的頻率輸出信號,壓力損失較小和量程比較寬等優點,因而應用相當廣泛。
  8. Abstract : the paper introduces a new kind of vortex gas mass flowmeter, which can measure gas mass flow by testing the vortex frequency and the horizontal varying lifting force

    文摘:介紹了一種利用檢測漩渦頻率和橫向變動升力的方法測量氣體質量流量的漩渦式氣體質量流量計。
  9. In t his p aper r otating s tall a nd t he inlet v ortex in c entrifugal fans with inlet v ane control has been studied in laboratory. the harmonic wavelet is firstly used for time - frequency analysis and feature extraction of pulsation amplitude and frequency and development of rotating stall and inlet vortex. the development rule of rotating stall and inlet vortex and the effect to fans performance from the two has been found

    文中對採用入口導流器調節的離心通風機的旋轉失速和進口渦流問題進行了實驗研究,並藉助諧波小波對旋轉失速和進口渦流的頻率、幅值特性及動態過程進行了時頻分析和特徵提取,揭示了旋轉失速和進口渦流發展的規律及二者對風機性能的影響。
  10. The butterworth wavelet filter with good magnitude - frequency characteristics is adopted to process the vortex flow signal, and the fundamental frequency of signal is estimated effectively. the algorithm is implemented in a digital signal processing system based on a tms320vc5409 dsp chip, and its effectiveness is proved

    採用幅頻特性較好的iir型butterworth小波濾波器,處理渦街流量信號,估計基頻,並在以tms320vc5409為核心的渦街流量計數字信號處理系統上實現,證明其方法的有效性。
  11. The vortex type fluid oscillatory flowmeter based on measurement of vortex hydrodynamic vibration generated by specific flow passage, and the frequency of fluid oscillations is in direct proportion to flow rate

    旋渦型流體振動流量計是利用流體在特定流道條件下流動時產生的旋渦振蕩,而且其振蕩頻率與流速成比例這種規律來測量流量的流量計。
  12. There were some intensively nonlinear features in the vibrating cascade flow. the frequency of the separated vortex ' s propagation was not equal to the vibrating frequency of the blade

    二維分析中發現振動葉柵非定常粘性流動具有較強的非線性特徵,振動誘發的分離渦傳播頻率與葉片的振動頻率不一致。
  13. Finally, multi - passage method was adopted to deal with the phase - difference periodic boundary condition. when the frequency of separated vortex propagating is not the same as the vibrating frequency of blade, this method is much more reasonable than those simple phase - shifted periodic condition in single passage

    最後,採用多葉柵通道計算來處理相差周期邊界條件,在分離渦傳播頻率與振動頻率不同時比其它採用簡單相移條件的方法更為合理。
分享友人