cross-under pipe 中文意思是什麼
cross-under pipe
解釋
跨接管-
Based on the review, the fluid flow and heat transfer in the curved circular and rectangular pipes have been researched by employing perturbation method and numerical simulation with a physical model under the rotational orthogonal curvilinear coordinate in a rotating curvilinear pipe with multi - parameters. we firstly analyzed the fully developed fluid flow and heat transfer, mixed convection heat transfer, the development of flow and heat transfer in the inlet in different cross section ( circular, elliptical, annular and rectangular crossection ). the variations of the secondary flow, axial velocity, distribution of temperature, the friction force on the wall, the ratio of friction factor as well as the nusselt number with different dimensionless parameters had been examined in detailed
本文在總結和分析了一個世紀以來有關曲線管道流動和換熱特性的研究成果的基礎上，以旋轉正交曲線坐標系統下的多參數旋轉螺旋管道中的對流傳熱為物理模型，通過攝動方法和有限體積法，首次對各種截面（圓截面、橢圓截面、環形截面、矩形截面）旋轉曲線管道內充分發展流動的流動結構和傳熱特性（包括耦合對流傳熱特性）以及旋轉曲線管道開口段發展流動的流動結構和換熱特性進行了系統的數值模擬和理論分析，詳細討論了各種無量綱參數對管道內軸向速度分佈、二次流結構、溫度分佈、壁面摩擦力、摩擦系數比以及管道nusselt數的影響，獲得了若干創新性成果。 -
For the needs of second - term project for pudong airport there is possibility to construct a tunnel of serving driveway under the operating runway, but it s obviously of great difficulty, and nowdays there are few such projects for reference, so it is urgent to carry out the research to make sure of the feasibility for the construction based on the analysis of geologic information, cross section of the line and restriction of construction, in this paper three construction schemes and the effects of each scheme were analysed : cut and cover method, pipe roof culvert box advancing method. shield driving method
摘要浦東國際機場二期工程建設存在著在運營跑道下實施地下穿越的可能性，在運營跑道下實施地下穿越難度很大，而目前國內外軟土地區在跑道下實施地下穿越工程很少，因此論文通過研究分析了服務車道地下穿越跑道區域的可行性及方案。
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