impinging jet 中文意思是什麼
impinging jet
解釋
沖采射流-
According to rigorous procedures, an experimental study was carried out to investigate the effects of jet exit velocity, flow direction, fluid subcooling and nozzle diameter on hysteresis of boiling heat transfer with impinging circular submerged jets of highly - wetting liquids
摘要系統地研究了液體在圓形斷面噴嘴浸沒射流作用下沸騰熱滯后與射流沖擊速度大小、液體流動方向、液體過冷度和噴嘴直徑等因素的影響。 -
The thermal visualizations of jet impingement cooling with single or double row holes inside semi - enclosed channel are measured by using infrared camera and then the impingement cooling heat transfer coefficients are deduced. the effects of flow and geometry parameters on convective heat coefficients are obtained. the results show that : for a single row normal impingement, the impingement cooling effectiveness is enhanced with the increase of impinging reynolds number or the decrease of hole space to diameter ratio, and the best effectiveness is achieved under the jet - to - surface spacing equals to 2 ; when the jet is oblique to the confined wall, the cooling effectiveness is weaken especially under the jet - to - surface spacing ratio is greater than 2 ; for double rows normal impingement cooling, the cooling effectiveness of rear row jet is weaker than the front row under lower impinging reynolds number or bigger jet - to - surface spacing
對于單排垂直射流，沖擊冷卻效果隨射流雷諾數的增加、孔間距與直徑比的減小而得到提高，沖擊間距比為2時換熱效果最好;沖擊孔中心線向通道封閉一側傾斜后，射流沖擊冷卻的范圍變窄，當沖擊間距比大於2時駐點區的對流換熱能力明顯降低;對于雙排沖擊射流，孔排間距與直徑比的增加使沖擊冷卻范圍變大，但在兩排孔之間區域的對流換熱系數有所下降;在較小的沖擊射流雷諾數和較大的沖擊間距比下，後排射流的沖擊換熱效果要遜於前排射流。 -
Numerical simulation under - expanded supersonic impinging jet
二元混壓超聲速進氣道三維流動數值分析 -
The - two - equation turbulence model and the control - volume integration method and simplest algorithm were employed to simulate the three dimensional, isothermal, incompressible, rectangular two - impinging - jet on a flat plate
本文採用-紊流模式，使用控制體積積分之有限差分法及simplest計算程序，進行三維、恆溫、不可壓縮、矩形雙噴射撞擊流場之數值模擬。 -
For two up and down plunging jets, an optimization model is introduced according to maximum energy dissipation. in this model, the exit angle of jet is first considered actually. the optimal computation of the energy dissipation between two impinging jets in xiao - wan project demonstrates that this model is reasonable too ; 6
對于上、下雙股挑流水舌，以碰撞消能率為優化目標，首次考慮了出口水舌的坦化影響因素，建立了優化數學模型，並通過對小灣拱壩壩身表、中孔水舌的碰撞計算，認為所提出的數學優化模型是可用的； 6 -
The shearing layer is carried by the jet and the eddy is formed because of the instability and selective amplification of shearing layer which will propagate to the downstream. as the eddy impacts the impinging wall, a wave of pressure disturbance with certain frequency is induced. this wave then propagates to the upstream with high speed, and results in the overlap and amplification of the waves when the frequencies of them are close with each other
當前噴嘴流束中的不穩定擾動波在穿過腔內的剪切層時，剪切層對其有選擇放大作用，形成渦環結構，剪切流動中渦環與碰撞壁撞擊，在碰撞區域產生壓力擾動波並向上游反射，在上游剪切層分離處誘發新的擾動的產生，當新擾動與原擾動匹配時，射流上游就被不斷地受到周期性激勵，腔內就產生流體自激振蕩並在後噴嘴出口形成脈沖射流。 -
Noise directivity of impinging jet from a small diameter axis ymmetric convergent nozzle on a large flat plate
低速沖擊載荷下加筋板彈塑動力響應分析 -
Application of technology on augmentation of heat transfer in the grinding contact zone with radial jet impinging in creep feed grinding
緩進給磨削時磨削弧區徑向射流沖擊強化換熱技術的應用 -
Firstly, for jet array impingement cooling, the effects of the distance of adjacent holes, the impinging distance and jet reynolds number on heat transfer characteristic at the target wall are summarized under staggered holes arrangement and the same hole diameter. and then, the numerical simulation of inclined multi - hole film cooling has been studied. the influence factors examined in this case include blowing ratio and the distance of adjacent holes
首先通過對射流沖擊冷卻方式的研究，分析了相鄰孔間距、沖擊間距以及射流入口雷諾數對沖擊靶面換熱系數的影響情況，然後對多斜孔冷卻方式進行了數值模擬，重點探討了吹風比和相鄰孔間距對絕熱溫比與壁面換熱系數的影響規律，最後，針對沖擊-發散復合冷卻流場的計算物理模型，研究吹風比、相鄰孔間距的變化對沖擊-發散復合冷卻流動與傳熱特性的影響。 -
Effect of wall function in numerical study on turbulent impinging jet
紊流沖擊射流數學研究中的壁面函數法 -
Planar laser induced fluorescence ( plif ) was used to study the spray / wall impinging in constant volume vessel. the experimental result show that when fuel spray impinging on the plane wall, wall jet was formed while fuel impinging on a plane wall with a bump, when the wall jet meet the bump, a secondary jet can be formed. some parameters affecting the secondary spray were studied, including bump height, the secondary impinging distance, impinging distance and injector parameters
對傳統燃燒室和bump燃燒室內燃油空氣混合過程進行了對比研究，發現燃油撞壁以後在傳統燃燒室壁面形成壁面射流，這一層燃油濃度很高，很難與空氣混合，而在bump燃燒室內，壁面射流遇到bump后，會在空間形成二次射流，二次射流進一步能快速與空氣充分混合。 -
The experimental investigations were performed on the impinging shear flow that is comprised with a jet shear layer impinging a plate parallel to the jet
本文對撞擊剪切流，即射流剪切層撞擊順流放置的平板的流動，進行了實驗研究。 -
The last or main injection pulse is set around tdc. when the diesel spray impinging on the combustion wall, the bump around the combustion chamber wall can strip off the wall jet and form a secondary spray in combustion chamber, so the fuel and air can mix well and homogenous
在主噴射時刻，利用燃燒室壁面的bump迅速剝離壁面射流，在空間形成二次射流，二次射流進入燃燒室空間后，再一次與空氣混合，形成相對均勻的稀混合氣。 -
Experimental study on sediment transportation by impinging jet
射流沖沙研究
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