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- Karman vortex street was observed in the wake of a rough Mat plate at M=2.2.The supersonic vortex flow was investigated by optical methods. 在一塊粗糙平板的超音速尾流中(M數2.;2);產(chǎn)生了卡門(mén)渦街。用光學(xué)方法研究了超音速卡門(mén)渦街。
- This paper deals with the mechanism of Karman vortex street and calculation of vibration frequency as well as the exciting force induced by vortex. 本文闡述了卡門(mén)渦列的機理,并計算了卡門(mén)渦列振動(dòng)頻率及誘發(fā)的激振力大小。
- The emission frequency of the Karman vortex street occurred in series from the blades and tongue is varing with the running condition. 將流程泵葉輪葉片和壓水室的隔舌看作旋渦發(fā)生體,在不同運行工況下在葉片后緣以及隔舌兩側串聯(lián)發(fā)生的卡門(mén)渦街的發(fā)射頻率是不同的。
- It is presented how to successfully simulate the phenomenon of Karman vortex street when fluid passes by vortex flowmeter by using FLUENT software. 摘要運用FLUENT數值仿真軟件成功的模擬出流體流經(jīng)渦街流量傳感器時(shí)所產(chǎn)生的卡門(mén)渦街現象。
- The simulating results of NACA0012 airfoil in sub-critical flow and the Karman vortex street over a circular cylinder can demonstrate the validity of this method. 通過(guò)NACA0012翼型的亞臨界繞流計算和低雷諾數繞圓柱流動(dòng)的卡門(mén)渦階的模擬說(shuō)明了本文發(fā)展的方法的準確性。
- It is found in this work that the Von Karman vortex street could be totally suppressed at low Reynolds number region after adding the control cylinder at proper position. 由實(shí)驗之結果發(fā)現：在錐形圓柱流場(chǎng)之適當位置加入控制圓柱后，在低雷諾數可使其尾流之馮卡門(mén)渦街完全消失；
- Can you spot another vortex street in the image? 你能在圖中找到另一渦旋列嗎?
- The test showed that there are Karman vortex street behind cylinder ,but the rule of shedding frenquency as strouhal number is defferent compared with that the cylinder is put into outflow. 實(shí)驗結果顯示,在平面葉柵風(fēng)洞內的圓柱體尾流中有類(lèi)似在外流中的卡門(mén)渦街脫落現象,但所對應的斯特勞哈數比外流稍小。
- So the frequency can't be simply calculated by the frequency formula of Von Karman vortex street around cylinder because Karman's formula is independent of hydrofoil's attacking angle. 尾流內存在周期性很好的類(lèi)似卡門(mén)渦列的流動(dòng)現象，其頻率與葉片繞流狀況有關(guān)，隨著(zhù)葉片入流角增加而增大，且屬于低頻范疇，因此，不能簡(jiǎn)單地采用圓柱繞流卡門(mén)渦街的頻率公式進(jìn)行計算。
- A vortex street can often be seen downwind of Cheju Island, Korea. 在此冬季盛行風(fēng)下,朝鮮的濟州島下游經(jīng)常出現渦旋列。
- When Reynolds number is s aller than 200, the vortex street can be co. pletely suppressed by a s all circular cylinder which is placed in the edge of the "dead water region" . 當雷諾數小于大約200的情況下,在圓柱體“死水區”一側的邊沿,放置一個(gè)直徑很小的控制圓柱體,可以抑制卡門(mén)渦街的產(chǎn)生。
- The flow fields in the blood pump show that a series of vortexes just like Karman vortex street occur downstream the impeller, making the flow unsteady. 計算了血泵內的流場(chǎng)分布，發(fā)現由于葉輪的高速旋轉，葉輪后出現了類(lèi)似于卡門(mén)渦街的旋渦，造成流動(dòng)不穩定。
- karman vortex(Karman vortex street) 卡門(mén)渦流（卡門(mén)渦街）
- Keywords Column;disabler;a load of the wind;Karman vortex street; 塔器;失效;風(fēng)載荷;卡曼渦街;
- Improving its antivibration performance is a difficult techmical problem which must be solved in the study and application of vortex street flowmeter. 在渦街流量計的研究和應用中，提高其抗振性能是必須解決的技術(shù)難題。
- Occurring in gas-liquid two-phase vortex street, the the rule of gas-liquid two-phase Strouhal number are studied in gas-liquid two-phase flow. 在氣液兩相流中,研究了發(fā)生氣液兩相渦街時(shí),氣液兩相斯特羅哈數的變化規律。
- The Analysis and Elimination of Vibration by Karman Vortex Street in tube AH 管式空氣預熱器卡門(mén)振動(dòng)的分析及消除
- The effect of bathymetry on the characteristics of vortex streets is numerically studied in this paper. 摘要本文中，我們利用數值模式，探討地形水深對渦流射出之影響。
- In this paper, the Strouhal number of the triangle cylinder, occurring in gas-liquid vortex street (the Karmen vortex street), are studied experimentally in horizontal gas-liquid flow. 摘要研究氣液兩相斯特羅哈數，可為利用氣液兩相渦街特性測量氣液兩相流量與組分開(kāi)辟一種新方法，也可開(kāi)發(fā)出適用于氣液兩相流體流量等參數測量的新儀表。
- They spend the winter(s) in a warmer climate. 他們在氣候較暖的地方過(guò)冬。
