piv 中文意思是什麼

piv 解釋
峰值反向電壓
  1. Compared with traditional contact flow measurement methods, presents the non - contact flow measurement methods, and emphases the application of laser doppler anemometry ( lda ) and particle image velocimetry ( piv ) to flow field measurement

    摘要與傳統接觸式流量測試方法相比較，介紹了非接觸式流量測試方法，重點介紹了激光多普勒技術（ lda ）和粒子圖像測試技術（ piv ）在流場測試中運用的原理。
  2. Determination of power - law flow field in annulus line with piv technology

    技術測量冪律流體在環空管道內的流場
  3. Cfx software is used to simulate flow fields of water cushion pool. contour stream line, vortex and kinetic energy in water cushion pool are found and offered as visualization form. the results of numerical simulation and piv are analyzed and compared in this paper

    使用數值軟體（ cfx ）對此水工實驗模型的淹沒射流流場進行了數值模擬，得到水墊塘內的速度場、等流函數線圖，將這些計算結果以可視化結果的形式給出。
  4. Air is entrained as water jetting into water cushion pool, the gas - liquid two phase flows field are formed. the every phase velocity field are measured by using piv and ptv ( particle tracking velocimetry ) method in the course of jet angle 75and60 in gas - liquid flows of water cushion pool. image house of two phase flows are set up

    西安理工大學碩士學位論文使用數字圖像處理技術中的piv和ptv測速技術就射流入水角75度和60度兩種情況分別測量了水墊塘模型水氣兩相流流場的各相速度場，建立了相應的兩相流流態圖像庫。
  5. Estimation of turbulent kinetic energy dissipation rate in channel flow by piv

    數據估算槽道內湍流動能耗散率
  6. Estimation the turbulent dissipation rate in a horizontal rectangular duct by large eddy piv method

    方法測量水平矩形槽道內湍流耗散率
  7. The system of piv is constructed suitable for measuring the particle movement and the flow pattern of particle clusters is visualized in the cfb. under the low and high solid flux, this work also study the aggregate properties such as the two - dimensional shapes, velocity and existence time of clusters on several axial / radial positions

    對循環流化床冷態實驗臺兩測試段進行了流型和顆粒團可視化研究，分別獲得了較低循環流率下過渡區和在高循環流率下稀相區顆粒團的運動速度，形狀，持續時間及其動態變化情況。
  8. Study on round turbulent jet in a cross flow with piv

    在橫流中的湍射流實驗研究中的應用
  9. 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
  10. With piv technology, the flow field was measured to judge the performance of pump sump. by analyzing the pictures of velocity, streamline, turbulent kinetic energy and vorticity, we found that the turbulence was bigger while the ratio of the runoff increased. and the vortices always appeared in the field where the runoff was small

    通過piv試驗，測量了封閉式水泵吸水室內部的流場，以研究該水泵吸水室的性能； （ 2 ）通過分析流速圖、流線圖、湍動能圖和渦量圖，發現了流量比越大，湍動越大，漩渦總是出現在流量較小的一側。
  11. Investigation on the characteristics of vortex wave flow by piv

    技術測試渦旋波流場
  12. The velocity, turbulent intensity, and reynolds stress of the liquid was measured with ldv, while the hold up, velocity of gas were measured with piv

    用ldv測量液相時均速度、湍動速度和雷諾應力，用piv測量含氣率和氣泡運動速度。
  13. These results validate that micro - piv is well suitable to investigate fluid flow in the microchannels in condition that the right seeding particle, microscope system and illumination pattern is selected

    這表明通過選擇合適的示蹤粒子、顯微系統和照明方式， mpiv技術在微尺度流體機械內流的實驗研究領域有很大的應用空間。
  14. Although the structure of the pump is different from the normal one, the performance of the pump can be measured and the internal flow fields in the volute and impellers can be investigated by using piv easily

    這樣，該實驗裝置既能進行水泵性能試驗，又滿足piv的測試要求。本文在轉速為1200r / min工況下，進行了水泵的外特性試驗，得到了水泵的性能曲線。
  15. Sphericity electromagnetism valve and trail strobe are separately employed for adjusting entering flux and water deep of pool. piv and ptv are employed to measure velocity field of model in the two cases of 75 and 60 and flow state image house are set correspondingly

    在此基礎上，使用數字圖像處理技術中的piv和ptv （ particletrackingvelocimetry ）演算法分別測量了射流入水角75度和60度兩種情況水墊塘模型流場的速度場，建立了相應的流場流態圖像庫、速度場庫。
  16. Selection and supply of tracing particles in the flow field measurement of ic engine using piv

    內燃機缸內流場測量示蹤粒子的選取與供給
  17. Use commercial software numeca to calculate the flow - field of the inlet of the lsc with an insert - board, and analyze the flow - field. also a piv ( particle image velocimetry ) flow - field testing scheme is designed, but have not been carried out for some reasons, for reference only

    同時還利用numeca商業軟體對以這臺壓氣機為模型的進氣道在插板作用下的流場計算及分析，另外還設計了piv流場測量方案，因為種種原因沒有能夠最終進行試驗，僅供參考。
  18. Fisrt, the flow field of radial and tangential annulus with rotating flow are made by using an advanced piv system, its flow field characteristics are obtained preliminary probed. it is found that the flow field characteristics are not the same between unpermeateing flow and have permeateing flow, otherwise the flow field is compared between rotating flow and dynamic tubular membrane

    首先通過採用先進的piv測試系統，對旋轉流膜器的徑向環隙和切向環隙處的流場進行了實測，初步探討了其流場特性，發現在無滲透流和有滲透流的情況下其流場並不相同，並與旋轉動態膜的分離特性進行了比較。
  19. In this dissartation, by using the particle image velocemetry ( piv ) system and microfiltration of incompressible inorganic salt powder systemic investigation are made on the flow field of polyacrylate tubular membrane elements with rotating flow. it is compared the slurry inlet method between tangential and axial

    本文通過piv激光測試系統首次對聚丙烯（ pa ）旋轉流管式膜流場進行了實測，並利用sio _ 2進行分離實驗，比較兩種不同的切向進料方式對過濾與分離的影響，並與普通十字流過濾進行比較，提出了旋轉流膜管的再生方式。
  20. Experimental study on particle size measurement of atomizing coal - water paste with piv technology

    測量水煤膏霧化粒徑的試驗研究
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