Central Jilin urban agglomeration is regarded as an important territory where we can solve the bubble problem of urbanization level and transfer surplus rural labor force. 吉林省中部城镇群是吉林省解决城市化水平虚高和转移大量农村人口的重点地区。
Change of bubble behavior in electric field and its effects on boiling heat transfer 电场中汽泡行为的变化及对沸腾换热的影响
Present experimental results in bubble column and published data are in reasonable agreement with the proposed models which may be used to predict heat transfer coefficient in bubble column bioreactor with Newtonian and non-Newtonian fluid. 又可用于非牛顿流体的计算气泡塔中给热系数的一般理论模型,其计算值与本文的实验数据、理论分析取得了一致的结果。
Study on bubble deformations on heat transfer surface in electric field and its effects on boiling heat transfer 电场中气泡在换热表面上的变形及对沸腾换热影响
Bubble dynamics and heat transfer mechanism of pool boiling of R-113 R-113池沸腾气泡行为的可视化及传热机理
Bubble column reactor has its own strong points such as simple structure, low construction and operating cost, good heat transfer property. 鼓泡塔反应器具有结构简单、造价及操作费用低廉、传热性能好等诸多优点。
On the basis of chemical transfer theory, the transfer mechanism was studied for the process of adsorptive bubble separation and the mathematical model describing the axis diffusion in continuous foam column and basic equation about the rate of mass transfer are set up. 以化工传递理论为基础,研究了吸附泡沫分离过程的传质机理,建立描述该传质过程速率的基本方程及轴向扩散连续泡沫分离塔数学模型。
System pressure is with direct effects on the bubble size of the heated surface, and the heat transfer from heated surface to liquid. 系统压力直接影响加热面上汽泡的大小,从而影响壁面向液体的传热量。
The influence of Taylor bubble movement on heat mass transfer was assumed based on the above analyses. 对上升管中气弹运动对传热传质的影响提出了假设。
Experimental Study on the Effect of Bubble Growth Condition on Boiling Heat Transfer 汽泡生成状态对沸腾传热影响的实验研究
Bubble distribution characters along the circumference of single pipe and pipe bundle dipped into the fluidized bed and their influence on local coefficient of heat transfer 流化床内浸入单管及管束沿周向气泡的分布特性及其对局部换热系数的影响
The Analysis of Bubble Work on Mixture's Boiling Heat Transfer 混合工质沸腾换热气泡形成功的推导及分析
Considers that the bubble fluctuation in main fluid flow importantly affects heat transfer on pipe wail, and the transfer mechanism relatively changes with the flow type. 认为液体主体中汽泡的扰动对壁面处的传热有较大影响,当流型发生转变时,其传热机理发生相应的变化。
Effect of bubble size on the oxygen transfer coefficient in reactor 气泡大小对反应器内氧传递系数的影响
The imposed electric field leads to the increase of the fluid movement inside the bubble and enhances the microlayer evaporation at the bottom of the bubble during the nucleate boiling heat transfer. 这表明外电场作用也有利于加剧气泡内部流体的运动,从而有助于核态沸腾换热过程中气泡底部微液层液体的蒸发。
The designed and developed a new type mass transfer column bubble mist tray through analysis of mass transfer mechanism of packing column and plate column. 通过对填料塔和板式塔的传质机理分析,运用流体力学和传质原理设计开发了一种传质新塔型&泡、雾沫塔盘。
Distance between transfer bubble or transfer catheter tip and the fundus was determined by transabdominal US to investigate the relations between the distance and PR or between the distance and abnormal pregnancy rate. 通过腹部B超测量移植内管尖距宫底距离及移植时推出气液滴距宫底距离,分析各组间妊娠率的关系及与异常妊娠的关系。
The results show that according to the curve of time varying interface acceleration, the process of DME bubble gorwth can be divided into three domains: surface tension controlled growth, transition domain and heat transfer controlled growth. 研究结果表明,根据气泡生长的加速度曲线,二甲醚气泡的生长过程可划分为表面张力控制阶段、过渡阶段和传热控制阶段。
The thesis develops applied research on the bubble dynamic behavior in the tube and establishes the energy transfer model of the cavitation jet in the tube, which is verified in the particle removal experiment. 开展了管道内空泡动力学行为的应用研究,建立了管道内的空泡射流的能量传递模型,并在管道粒子移除实验中进行了验证。
The agreement between numerical simulation results and experimental results confirmed the validity of the present model. Furthermore, based on the simulated stable Taylor bubble flow, by solving the convection-diffusion equation, the mass transfer process in a unit Taylor cell was simulated. 以计算得到的稳定Taylor流动为基础,通过求解对流扩散方程,模拟了Taylor气泡单元内的传质过程。
In non-thermal system, phase-change leads to bubble deformation accompanying with heat and mass transfer at interface. 而在非等温系统中,相变主导气泡变形且伴随界面处的传热传质。
The purpose is to produce a single bubble in a fluidized bed and to get the mass transfer coefficient from bubbles to the dense phase. 实验以三维模型和二维模型为基础,实验的目的是为了在流化床中产生单个气泡,进而得到气泡与密相的传质系数。
Bubble moving in liquid is widely found in nature and industry. The research on bubble motion characteristics and heat and mass transfer is beneficial for deep understanding of many reality phenomena. 蒸汽泡在液体中的运动现象广泛存在于自然界和工业生产中,研究蒸汽泡的运动机理能够深入理解现实生产生活中的很多现象,具有重要的实际意义。
The wetting and phase-change heat transfer characteristics in microgrooves are investigated experimentally. The experimental results show that the bubble dynamic behavior has a positive influence on advancing wetted height and enhancing phase-change heat transfer. 实验结果表明:汽泡的动力学行为对微槽内的液体润湿高度和相变换热能力有强化作用。
The formation of a single bubble and mass transfer for a fixed bubble were simulated by VOF method, respectively. The agreement between simulation results and experimental data confirmed the validity of the present model. 通过VOF方法对气泡的生成过程和固定气泡的传质过程进行了模拟,模拟结果与实验结果吻合良好,验证了模型的正确性。
Radial distributions of heat transfer coefficients both for bare vertical pipes and spin-fin pipes in 0476 bubble column were measured by in-house developed heat transfer probes. 鼓泡塔传热规律研究:使用自制传热探头测定了Φ476鼓泡塔内,列管内构件与针翅内构件的传热系数径向分布。
The investigations on the characteristics of bubble dynamics and on the mechanism of heat and mass transfer are conductive to the industrial equipment design and operation. 研究气泡动力学特性和传热传质机理有助于工业设备的设计及操作。
Empirical correlations by dimensional analysis and feed-forward back propagation neural network models were obtained to predict bubble characteristic parameters and gas-liquid volumetric mass transfer coefficient. 通过因次分析建立了气泡特征参数及气液界面液相体积传质系数的关联式,并进行人工神经网络模拟预测。
The diminishing process of Taylor bubble during physical absorption was recorded by the high-speed camera, and the temporal evolution process for the Taylor bubble was obtained, subsequently, the liquid mass transfer coefficient kL and specific surface area a for two-phase flow were calculated. 利用高速摄像仪记录了物理吸收过程中Taylor气泡的变小过程,得到气泡长度随时间的变化关系,并由此得出液相传质系数kL以及两相流的比表面积a。
Data of the diameter of the bubble, the nucleation site density and the bubble departure frequency are acquired by the image processing. The boiling heat transfer enhancement mechanisms on the enhanced surface are analyzed based on the image processing results. 通过图像处理及分析,得到了气泡直径、核化点密度以及气泡脱离频率的数据,分析了在强化表面上沸腾传热的强化机理。