laminar boundary layer 中文意思是什麼

laminar boundary layer 解釋
層吝界層
  • laminar : adj. 由薄片或層狀體組成的，薄片狀的；層狀的。 laminar flow 【物理學】片流，層流。
  • boundary : n 邊界，疆界，限界 （between）;（球場）邊線；界標；界限，范圍，分野。 aboundary dispute 邊界糾紛...
  • layer : n 1 放置者，鋪設者，計劃者。2 【賽馬】（一般）賭客。3 產卵的雞。4 【軍事】瞄準手。5 層；階層；地...
  1. In the thesis the low drag - low noise optimization of the vehicle main form design is realized, main accomplishments are as follows. researched the knowledge of drag and flow noise, the parameters of the boundary layer are calculated by the hess - smith method and boundary layer momentum integral method. the calculation of the length of transition zone and change in boundary layer displacement thickness between laminar and turbulent states in the transition is improved, then the drag coefficient and self - noise from the transition zone are calculated as the objective functions of the optimization

    主要研究內容和成果如下：對航行器繞流流場進行分析，深入研究了阻力和流噪聲產生機理，建立了阻力系數和自噪聲的評估數值計算模型；採用物面分佈源匯法和邊界層動量積分法對繞流流場的流體動力參數進行計算，改進了轉捩區長度和邊界層位移厚度的計算，應用於航行器頭部駐點自噪聲的計算；最後設計了阻力系數和自噪聲數值計算程序模塊。
  2. The characteristics of flow field in boundary layer are different from that of laminar flow and turbulence. so, it was not ignored

    邊界層雖很薄，但由於其水流特性與一般的層流、紊流特性相差甚大，因而它對水流的影響是不可忽略的。
  3. For instance, the development of the boundary - layer shape parameter can be prescribed on the upper surface to allow for maximum lift or extended runs of laminar flow, depending on the design requirements

    比如開發了邊界層的形狀參數，可以指定允許的最高表面上取消或延期舉辦層流、視乎設計要求
  4. All of the results indicated the turbulent boundary layer had been turned into the laminar layer. the skin friction coefficient drops rapidly. this result not only proved the phenomenon of reverse transition had occurred, but also showed that this condition was drag - reducing condition

    實驗結果表明板面附近的流動已由湍流流動轉變為層流流動，同時平板表面的摩擦系數較沒有溫度梯度時有大幅度下降，不僅證明了邊界層逆轉捩現象的存在，也說明了這種條件起到了減阻的效果。
  5. " similarity transformation methods in the analysis of the two dimensional steady compressible laminar boundary layer, " by yeunwoo cho and angelica aessopos ( pdf ) ( courtesy of yeunwoo cho. used with permission

    您對麻省理工學院開放式課件網站及課程資料的使用應符合我們法律聲明中的相關條款。
  6. Improvement of calculation method for approximate velocity distribution in a laminar boundary layer on flat plate

    平板層流邊界層近似速度分佈計算方法的改進
  7. Abstract : a numerical investigation of three - dimensional separated flows about a hemisphere - cylinder is presented. the analysis has been restricted to transonic and laminar flows. results are given for the complex flow field structures including shock, boundary layer, separated flow, vertical flow and their mutual effects. the topological structures of the separated flow is shown

    文摘:本文數值模擬了半球柱在跨音速、中等攻角時的粘性層流繞流，研究了流場中的復雜三維分離形態結構，其中包含流向與橫向的主分離、二次分離、以及激波邊界層的相互干擾，解釋了在球柱接合部精確捕獲的壓力波動與流動主分離、二次分離的影響關系，這個現象是前人的計算5 ， 6未捕捉到的。
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