cooling effectiveness 中文意思是什麼
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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。 -
The cooling effectiveness of effusion cooling in the regions with holes and downstream the last row of holes on hot side is much higher than that of conventionary film cooling with the same operation conditions
在熱側面上的氣膜孔區及其下游區，緻密多孔壁的冷卻效果都非常好，比同等條件下常規氣膜冷卻的效果好得多。 -
To investigate the influence of porosity of holes array on cooling effectiveness of an effusion cooled plat plate, a numerical study of the distributions of cooling effectiveness on the hot side of an effusion cooled flat plate was carried out with four different porosities of holes array
摘要為了獲得氣膜孔陣排列的疏密度對緻密多孔壁冷卻效果的影響規律，分別對四種疏密度排列下的平板熱側面上的冷卻效果進行了數值模擬研究。 -
( 2 ) on the leading edge, the film cooling effectiveness at the zone immediately downstream of the cooling holes is affected by blowing ratio and mainstream reynolds number, while the effects are not important in the downstream zone far from the cooling holes. ( 3 ) on the front half of pressure surface, the effectiveness increases with decreasing blowing ratio at the downstream near the cooling row and it is contrary at the downstream far from the cooling row. ( 4 ) on the rear pare of the pressure surface, the effectiveness decreases with increasing blowing ratio and does not vary so much downstream in the cases of higher blowing ratio
研究結果表明葉片吸力面端壁附近區域壓力系數分佈呈現出較強的三維特性，動葉吸力面尤其明顯；氣膜孔流量系數隨吹風比的增加而增大，在高吹風比情況下，流量系數逐漸趨于常數；在不同型面區域，冷卻效率分佈有較大的差異，而且吹風比與主流雷諾數的影響程度也不盡相同；低吹風比下，孔出口下游附近可以得到較好的冷卻，中、高吹風比下，冷氣射流在加速流動主流的作用下返回壁面進行二次冷卻，孔下游較遠區域可以得到較好的冷氣覆蓋。 -
Then the thermal visualizations of jet impingement cooling with single or double row holes inside semi - enclosed ribbed channel are measured by using infrared camera and the effects of flow and geometry parameters on convective heat coefficients are obtained. the results show that : the impingement cooling effectiveness of ribbed surface is affected greatly by the jet - to - surface spacing, and the best effectiveness is achieved under the jet - to - surface spacing equals to 1. the correlation formulas of impingement heat transfer characteristics to the parameters are finally concluded and in good agree with the experiment data
最後，對單排、雙排沖擊孔試驗板在半封閉通道展開了流量系數的研究，在變化各種幾何因素及流動因素的情況下由實驗得出了沖擊孔流量系數值，討論並分析了各種因素對流量系數的影響程度，建立了沖擊孔流量系數的準則關系式，與實驗結果對比表明:該準則關系式與實驗實測數據吻合較好，精度較高，有較高的工程應用價值。 -
The effects of blow ratio and rows on film cooling effectiveness and heat transfer coefficient was studied
研究了吹風比、孔排等因素對氣膜冷卻效果和換熱系數的影響。 -
A new model for film cooling effectiveness computation on blade surface in a turbine cascade
渦輪葉片型面氣膜冷卻效率的計算模型 -
The distribution of adiabatic film - cooling effectiveness on the endwall of this cascade has been measured using a new technique that has been developed as part of this project. using this new technique, the achieved levels of cooling effectiveness are quantified and over, and under - cooled regions on the endwall are identified
在發展一種新的測試技術的基礎上，結合葉柵下游流場測量，獲得了葉柵端壁上冷卻膜隔熱效率的分佈，使得葉柵端壁上下冷卻層的冷卻效率可分別定量描述。 -
The computational results show that to a certain extent the denser of the distribution of the holes, the higher of the cooling effectiveness
計算結果顯示：在一定的范圍內，孔陣排列的疏密度越大，冷卻效果越好。 -
Numerical simulation of the impact of leading - edge gas - film pores on cooling effectiveness in turbine stator blades
前緣氣膜孔對渦輪靜葉冷卻效果影響的數值模擬 -
This vest has several advantages including sound design, good cooling effectiveness, proper matching, and excellent capability of heat preservation
該降溫背心設計合理，製冷介質降溫性能良、貼合性好，保溫裝具的保溫性能優良。 -
On improving cooling effectiveness of lamilloy with infrared technique
技術的當地流活塞理論 -
Investigation of the cooling effectiveness of lamilloy
幾何參數對層板冷卻性能影響的數值模擬研究 -
Numerical investigation of back - step three dimensional slots on film cooling effectiveness
后臺階三維縫隙冷卻效率的數值模擬 -
Numerical investigation on improvement of film cooling effectiveness using delta - shaped tabs
尾跡對氣膜冷卻影響的三維非定常數值模擬 -
Effect of aerodynamic parameters of backward - step three dimensional slots on film cooling effectiveness
氣動參數對后臺階三維縫隙氣膜冷卻效率的影響 -
The experimental results showed that the film cooling effectiveness were mainly determined by blowing ratios
該實驗結果對渦輪葉片型面氣膜冷卻的實際工程設計研究有重要意義。 -
At the same blow ratios, the double - layer porous plate exhibits higher cooling effectiveness than single - layer, but the difference of cooling effectiveness between the triple - layer plate and the double - layer plate is not significant
在相同吹風比下，雙層層板要比單層層板冷卻有效性高，而三層層板與雙層層板之間的差別不大。 -
The results show that : blow ratio is a main influential factor to the film cooling effectiveness, the film cooling effectiveness decreases with the increasing of blow ratio ; the film cooling effectiveness of discrete holes fluctuate dramatically across the transverse section, and dead zone is prone to occur be tween two discrete holes
結果表明：吹風比對氣膜冷卻效果的影響很大，冷卻效果隨吹風比的增大而降低；圓孔氣膜冷卻效果沿橫向位置波動較大，孔之間容易形成冷卻死區。 -
Combined with the permeability and heat transfer properties of lamilloy configurations obtained by experiments, a one - dimensional porous wall thermal heat transfer model was applied to the analysis of the mass flow rate, and the overall cooling effectiveness of different lamilloys according to the pressure drop between the two sides
摘要基於一維多孔材料內傳熱理論，建立層板冷卻的理論模型，應用由實驗獲得的各種層板結構的流阻和換熱特性，由層板兩側的壓差估算通過層板的冷氣流量和層板結構的冷卻有效性。
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