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- On the basis of hydrodynamics, the vortex shedding condition was investigated. 摘要根據流體力學(xué)原理,分析靜止管道的旋渦脫落;
- Such parameters of flow characteristics are investigated as lift and drag coefficient and vortex shedding frequencies. 計算了圓柱的升阻力系數、尾渦脫落+頻率等描述繞流問(wèn)題的主要參量。
- The most important aeroelastic behavior of high-rise buildings are some special phenomena due to vortex shedding in the across-wind direction. 高層建筑的氣彈力行為中,主要在于橫風(fēng)向上受渦漩作用所產(chǎn)生之一些特殊現象,本文針對順風(fēng)向、橫風(fēng)向變位及鎖住現象進(jìn)行探討。
- It is found that a steady wind of Beaufort force 6 may cause vortex shedding of a frequency coinciding with the second bending frequency of the structure. 然后,在發(fā)生風(fēng)致振動(dòng)的實(shí)際條件下,測量了振動(dòng)頻率和振型以及當時(shí)的風(fēng)速,確認振動(dòng)的原因是一種流固耦合作用形成的風(fēng)的尾流脫落激勵引起結構共振。
- The fluctuate drag and lift forces of tree branches in wind due to vortex shedding were estimated using the vortex induced vibration theory of circular cylinder. 采用圓柱繞流的渦致振動(dòng)理論估算了樹(shù)枝在風(fēng)中因旋渦脫落而引起的脈動(dòng)升力和阻力;
- The numerical results demonstrate that Reynold number is the major factor controlling the flow.Under different high Reynolds numbers, there is different vortex shedding condition. 通過(guò)數值分析,得出在繞流問(wèn)題中雷諾數是決定流型的主要因素,在不同的雷諾數下,旋渦脫落也隨之不同;
- Based on vortex shedding flowmeter work theory and manufacturing technique,we used positioning fixture to fill with the technique requirement,guarantee the quality and raise efficiency. 根據渦街流量計的工作原理和生產(chǎn)工藝流程,提出了其在生產(chǎn)過(guò)程中的關(guān)鍵工藝問(wèn)題,應用定位夾具來(lái)滿(mǎn)足相應的技術(shù)要求,以保證質(zhì)量和提高效率。
- This paper puts enough emphasis on the similarity in analyzing the mean velocity over a long period of time (where the long period is referred to as a cycle of the Karman Vortex Shedding). 從相似性的角度,對流速在尾流擺動(dòng)一個(gè)周期內的平均值進(jìn)行了分析。
- Finally, the characteristics of the vortex shedding in the wake are analyzed.Under the given experimental condition, the conclusion is drawn that the Strouhal number keeps the constant of 0.2. 對圓柱尾跡的旋渦脫落特性進(jìn)行了分析,得出在試驗條件下斯特勞哈爾數保持為常數0.;2的結論。
- vibration induced by vortex shedding 渦激
- The vortices shedding frequency calculation model proposed by this paper can be used to predict the shedding frequency of the Karman vortices for hydraulic turbines design. 本文建立的水輪機固定導葉和活動(dòng)導葉后卡門(mén)渦頻率預估模型,可在設計階段進(jìn)行葉片繞流卡門(mén)渦頻率的預估。
- Design of Embedded Digital Intelligent Vortex Shedding Flowmeter 嵌入式數字智能渦街流量計的設計開(kāi)發(fā)
- In the picture a man is seen observing a meter. 你在圖中可以看見(jiàn)一個(gè)人在觀(guān)察儀表。
- Large eddy simulation of vortex shedding for model SRM 模型固體火箭發(fā)動(dòng)機內渦脫落過(guò)程的大渦模擬
- Do you remember the reading on the meter? 你記得表上的讀數嗎?
- The boy is one meter tall in his stocking feet. 這個(gè)小男孩不穿鞋的身高是一米。
- Fantastic, he cleared2.4 meter without difficulty. 好極了,他輕松地越過(guò)了2米4。
- Follow the railroad track about100 meter. 順著(zhù)鐵路走大約100公尺。
- Some analysis must be done previously for coupling analysis of flow and structure, such as characteristics of complex unsteady aerodynamic force, vortices shedding frequency, vibration mode and vibration characteristic of blade, etc. 分析葉輪機械通道內部復雜非定常氣動(dòng)力特征和旋渦頻率特性,掌握葉片的振動(dòng)特性、葉片的振動(dòng)模態(tài),是采用流/構耦合分析研究葉片振動(dòng)的前提。
- He broke the record for the one-hundred meter dash. 他打破了百米賽跑紀錄。