gas transfer velocity 中文意思是什麼
gas transfer velocity
解釋
氣體轉移速度-
The hydrodynamic parameters and mass transfer coefficient are studied in the internal loop airlift bioreactor used in treating wastewater. the hydrodynamic parameters consist of gas holdup, liquid velocity and axial dispersion coefficient
本文從流體動力學和傳質動力學兩個方面考察了用氣升式內環流生物反應器應用於廢水處理的性能。 -
In this paper, high heat penetration into a moving particulate bed is described mathematically with a comprehensive heat and mass transfer model. the distribution of gas velocity and pressure, the temperature field of gas and solid in the moving particulate bed are examined for different conditions. the results show that thermal penetration into the moving packed - bed particles by fluid flow in porous media is high only in the position near the gas entrance. the thermal penetration thickness tends to increase with the fluid flow velocity and decrease with the particle moving velocity. in the region of thermal penetration, the porosity of solid bed has significant effect on gas field and pressure loss. it is feasible to reduce the gas pressure loss by a larger width / height packed bed in design and operation. the correspondence between thermal infection depth and particle bed height would be helpful to keep high oapacity of reactor and reduce the cost of operation
針對移動顆粒床中物料層內的高溫氣體滲流傳熱現象，考慮滲流與傳熱的相互作用，採用局部非熱平衡假設建立了多孔介質滲流傳熱物理數學模型並進行了數值計算.研究了不同情況下床內填充多孔介質中的流速、氣固溫度和床層壓力損失.計算結果表明，高溫熱氣對移動床顆粒料層的熱滲透主要發生在滲流入口端區域，增大入口滲流速度以及減小床層物料下移速度將導致物料溫度沿床高慢速下降，熱滲透深度擴大，熱滲透作用區域內的物料溫度水平提高.在熱滲透作用區域，孔隙率對流場和壓力損失有很大的影響.研究結果對于移動顆粒床反應器的設計與運行具有一定的參考作用 -
Based on the analysis of regime of spray and heat transfer, the spray nozzles were redesigned to distribute liquid in the center area of th e tower and the gas inlet was enlarged to raise gas velocity
根據對順流式空塔的噴淋及傳熱模式的分析，重新設計了噴嘴，使噴淋液在設備中心附近集中；縮小了進氣管直徑，以提高進口氣體的流速。 -
Secondly, for the first time, by volume average concept and reynolds time - average method, a 3d quasi - single phase mass transfer model of distillation tray is deduced by considering the effects of velocity fluctuation, concentration fluctuation and volume fraction of gas and liquid on mass transfer. a source item sc for interphase mass transfer is considered. by applying conventional method of estimating the interphase mass transfer coefficient, a formula for sc is obtained
其次，採用體平均概念、雷諾時均化方法結合塔板氣液相互作用的實際情況首次推導了考慮速度、濃度脈動項和氣、液相含率影響的塔板三維擬單相流湍流傳質模型，源相中考慮了氣液相間傳質項sc ，並運用化工中關于相間傳質系數計算的理論，推導了sc的表達式。 -
In air - water system, the influence of gas superficial velocity on hydrodynamic parameters and volumetric mass transfer coefficient ( k, a ) is investigated. in order to simulate microorganism, a series doses of solid particle are added into water. in such an air - water - solid particle system, the influence of solid concentration on hydrodynamic parameters and volumetric mass transfer coefficient are studied
在空氣-水體系研究了表觀氣速對流體動力學參數和傳質動力學參數的影響；以固體顆粒模擬生物相、以柔性填料模擬生物填料床在空氣-水-固體顆粒和空氣-水-填料體系中研究固含率對流體動力學參數和傳質動力學參數的影響；以cmc溶液模擬實際操作中的液相介質研究液相粘度對上述參數的影響； 4 -
The influence operating conditions on the hydrodynamics and mass transfer performance of alr, including superficial gas velocity, the properties and level of liquid phase, the properties and content of solid phase, as well as electrolyte and magnetic field, are discussed
闡述了操作條件對氣升式反應器的流體力學和傳質性能的影響規律，包括表觀氣速、液相性質及液位高度、固相性質及固含率以及其他因素，如電解液和磁場等。
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