查询词典 choke flow

The results show that the turbulence intensity, fouling cleaning intensity and pressure drop increase with the increase of flow velocity, particle size and the volume fraction. The effect of liquid-solid fluidzed-bed cleaning fouling depends on the reasonable combination of flow velocity, particle size and the volume fraction. Through an integral consideration of water saving and energy saving and uniformity of fouling cleaning, the optimum flow velocity of flow, particle size and volume fraction are 2.0 m/s~2.5 m/s, 3 mm~4 mm and of 5%~8 vol%, respectively.

结果表明：流体的湍流强度、壁面污垢清洗强度和压力降均随流速、颗粒粒径和体积分数的增加而增加；液固流态化清洗防垢除垢效果取决于流速、液固颗粒粒径和体积分数的合理组合；综合考虑节水节能及污垢清洗的均匀性，高炉冷却壁的最佳流速为2.0~2.5 m/s，固相颗粒粒径为3~4 mm，体积分数为5%~8%。

In the context of a system of barotropic shallow-water equations and Boussinesq approximate equations for two-dimensional meso-scale transversal wave disturbance in zonally sheared base flow, study is performed of the physical process of the meso disturbance propagation along the flow, indicating that such vortex Rossby waves are separated into two kinds. The first kind VRW is produced owing to the second-order horizontal shear in the flow or due to the meridional change in vertical vorticity of the flow, i.

本文使用正压浅水方程组以及纬向切变基流下二维中尺度横波型扰动的Boussinesq近似方程组，分析了这种沿着基本气流方向传播的中尺度扰动的波动传播物理过程。

Get high purity DCs by Cultured plastic-adherent monocytes isolated from healthy human peripheral blood with GM-CSF and IL-4 for 7 days. To observe the morphology of DCs by inverted phase contrast microscope ,electron microscope and laser confocal microscope. Analyse phenotype of DCs with flow cytometry. Investigate the endocytosis ability of DCs as a group by Horseradish peroxidase endocytosis assay. To appraise allogeneic mixed lymphocytes reaction of DCs by MTT reduction assay. Analyse the levels of IL-12 and TNF in liquids of cultured medium by ELISA and MTT reduction assay respectively. Soluble antigens of HCCs was obtained by 3 freeze-and-thaw cycles. Biological characteristics of HC soluble antigens pulsed DCs were monitored by flow cytometry. According to MTT reduction assay estimated the cell proliferation of self lymphocytes activated by HC antigens pulsed DCs. Get high purity BCG HSP 70 protein by SDS-PAGE electrophoresis and determined its biological activity with ELISA. Analyse phenotype of antigen pulsed DCs primed by BCG HSP70 with flow cytometry. By MTT reduction assay estimated the cell proliferation of self lymphocytes and the MLR of DC based vaccine. Analyse expression of HLA-DR molecule on surface of HCC lines. The IFN-γ mRNA in lymphocytes after actived by DC vaccine and the Fas-L expression on DC and DC vaccine primed lymphocytes were detected by in situ hybridization and flow cytometry respectively. Specific cytotoxity lysis of T lymphocytes and nonspecific inhibition of liquids in culture medium against HCC lines were also tested. Detect expression of hAFP on four HCC lines with Cell-ELISA. Induce apoptosis of HCCs with actinomycin-D. Interaction of DCs and apoptotic cells was observed under transmission electron microscope. Growth inhibition test of DC against HCC lines was also performed. Establish the nude mouse model bearing human HC xenografts and indentify the characteristic of tumour by histochemistry and immunohistochemistry techniques. Prevent and treat transplanted human HC on nude mouse with Freezing and anabiotic HC specific lymphocytes.

用GM-CSF和IL-4从健康人外周血诱导DC；分别用倒置相差显微镜、电子显微镜及激光共聚焦显微镜观察DC形态；流式细胞术检测DC表型；HRP吞噬实验测定DC的群体内吞能力；MTT法检测同种异体混合淋巴细胞反应；ELISA法和MTT法分别测定DC培养上清液中IL-12和TNF水平；冻融法制备肝癌细胞可溶性抗原；流式细胞术检测负载肝癌可溶性抗原后DC的生物学特性；MTT法检测DC负载肝癌抗原后对自身淋巴细胞增殖的影响；SDS-PAGE制备电泳纯化BCG HSP70并鉴定纯度，ELISA测定活性；流式细胞术检测负载抗原DC经BCGHSP 70活化后的表型；MTT法检测肝癌DC疫苗对自身淋巴细胞增殖的影响和混合淋巴细胞反应；流式细胞术检测肝癌细胞表面HLA-DR表达；MTT法检测肝癌DC疫苗对自身淋巴细胞的活化；原位杂交法检测肝癌DC疫苗活化后的淋巴细胞IFN-γmRNA表达；流式细胞术检测DC和肝癌DC疫苗活化后淋巴细胞表面Fas-L；MTT法分别检测肝癌DC疫苗活化的淋巴细胞和其培养上清对肝癌细胞的特异性杀伤和非特异性抑制作用；Cell-ELISA检测人肝癌细胞hAFP表达；MTT法检测负载AFP表位肽和凋亡肝癌细胞DC对自身淋巴细胞增殖的影响；ELISA法和MTT法分别测定活化后淋巴细胞培养上清中TNF和IL-12水平；肝癌细胞凋亡的诱导和检测；DC吞噬凋亡肝癌细胞后的电子显微镜观察；DC对肝癌细胞的生长抑制试验；人肝癌裸鼠皮下移植瘤动物模型的建立及其组织学和免疫组织化学鉴定；DC及肝癌特异性淋巴细胞预防和治疗人肝癌裸鼠皮下移植瘤；冻存和复苏后的肝癌特异性淋巴细胞预防和治疗人肝癌裸鼠皮下移植瘤。

A straight inlet baghouse which can effectively reduce energy consumption of equipment in operation and lengthen the service life of fabric bags, as well as gas flow structure in the tank body have been presented, and numerically simulating the gas flow distribution in the tank body being carried out by using calculated flow dynamics method, providing a method and parameters for adjusting the gas distributing plates structure to realize reasonable flow rate distribution in the tank body.

摘要介绍了能有效降低设备运行能耗、提高滤袋寿命的直通式袋式除尘器及其箱体气体流通结构，并利用CFD方法对箱体流量分配和气流分布进行数值模拟，给出了实现箱体流量合理分配的气流分布板结构调整方法和参数。

Comparing with real engineering, analyze the experiment and simulation results, the conclusion is that the mixture model can simulate the flow field of gas-liquid two-phase well; the effect of plain plug flow aeration is better than circumvolve plug flow aeration's; for the same plug flow aeration , the effect of 20m/s aeration is better than 10m/s's and

结合实际工程的运行，对实验结果及模拟结果进行对比分析，结论为：采用混合模型能够很好的模拟曝气池内气液两相流的流场；平移推流式曝气比旋转推流式底层曝气的曝气效果好；在同种曝气方式，相同工况下，20m/s的曝气速度的曝气效果要比10m/s、30m/s的曝气速度的曝气效果好。

The density flow in horizontal-flow sedimentation basin is discussed, and the flow field is analyzed, the coagulative precipitation effect for different plans are compared, at the same time the measures of abatement of density flow are discussed.

对影响混凝沉淀效果最大的水流因素—平流沉淀池中异重流的形成原因进行了讨论，对其流场进行了分析，并对不同方案混凝沉淀效果进行了比较，同时，就减弱异重流的条件进行了讨论。

Thirdly, The mathematics model of forecasting low flow was established in Fengcong and Fenglin regions according to these factors influencing the amount of low flow in karst drainage (the area of drainage, lithology, the type of landforms and its special assembly and forest)The conception of low water resources carrying capacity was firstput forward according to the changing law of low water resources in space and the situation of exploitation and utilization in karst drainage (ie, under the condition of the virtuous ecological environment and the available technology, the explorable amount of water resources in certain areas is capacity and limitation which is able to coordinate the development of population, enviroment and economy during the period of low flow seasons) and preliminarily analyzed its connotation, characteristic and established the index system of low flow in karst drainage.

根据喀斯特流域枯水资源的空间变化规律以及实际开发利用状况，首次提出了枯水资源承载力的概念，即在枯水季节期间，保持良性的生态环境和现有的技术条件下，某一区域内可开采的水资源量对支持该地区人口、经济与环境协调发展的能力和限度。

Based on analysis of the current state of the flow pattern modeling abroad and at home, explains the meaning of the mathematical simulation of the flows in the valve.(2) Comparing flow simulation data of jet pump with its experimental one, the feasibility and reliability of FLUENT used for flow simulation are proved.(3) Based on the characteristic of valves, the fluid field analysis of specific ring-spray type flow-adjustable is finished. The valve structure is optimized to meet the need, which makes it have such advantages:(1)smaller vortex area and faintish vortex intensity, so the vibration of vortex is controlled effectively;(2)the pressure is distributed more equality, the transition area is larger.

论文的主要内容包括：(1)简述了阀门研究的现状与发展，在分析与总结国内外流体流动模拟研究的基础上，探讨开展阀门内水流运动数值模拟的意义；(2)对特定型号的射流泵进行了内部流场的数值模拟研究，并与实验数据相比较，验证了应用Fluent进行数值模拟的可行性和可靠性；(3)针对调流阀的特点，对特大口径环喷式流量调节阀进行流场计算，其设计指导思想如下： 1、控制旋涡，减小旋涡区，减小涡的强度； 2、控制压力分布，使阀体受力更均匀，改善局部应力状态，提高阀门使用的安全性； 3、最小绝对压力高于水的汽化压力，不产生汽蚀。

Based on an analysis of distribution pattern of hydrocyclone"s axial velocity, by changing the inlet flow rate Qi and split ratio Fand making an investigation in the effect of Qi and F on axial velocity field, the factors causing the forming of short-cut circuit and circulating flow are found. It is considered that the short-cut circuit and circulating flow are produced by the structure of the hydrocyclone, and can"t be eliminated completely, though they interfere the flow field inside a hydrocyclone and affect the separation accuracy. Test results show that, by increasing Qi and F and controlling them in a certain range, the separation efficiency of the hydrocyclone can be improved.

在研究旋流器轴向速度分布规律的基础上，分析了短路流与循环流的形成原因，试验研究了改变操作参数，即改变入口流量Qi与分流比F对轴向速度场的影响认为短路流与循环流是由旋流器结构决定的，很难完全消除，它们干扰了旋流腔和大锥段的流场，在一定程度上也影响了分离精度试验结果表明，加大入口流量Qi与分流比F，并将其控制在一定范围内，便可提高分离效率这项研究对水力旋流器分离机理的认识与实际应用均有重要意义

In this paper,the condition that gas flow through wood in the pattern of linear flux wasdetermined from the theories of thermodynamics and fluid mechanics.The expression of flow-resistor of tracheids is reduced with the continuity equation and the equation of motion indifferential form.The flow-resistor network is constructed by means of the theory ofpercolation.The equivalent flow-resistor was evaluated by utilizing the real spacerenormalization approach.

本文根据针叶材管胞的解剖结构，运用孔隙介质流体力学的理论，导出了管胞关于气体渗透流阻的数学表达式；继而根据管胞纹孔在三个纹理方向上的连接特性，利用管胞流阻建立了一个描述针叶材三个纹理方向气体渗透性的三维流阻网络；然后运用实空间重整化变换的方法，求解试件流阻网络三个纹理方向的等效流阻，并由此计算试件相应的气体渗透系数；最后用我国南方常见的人工林马尾松木材试件进行渗透系数实际测量，与理论计算结果进行对比分析，以验证三维流阻网络及其理论的准确性。

But this is impossible, as long as it is engaging in a market economy, there are risks in any operation.

但是，这是不可能的，只要是搞市场经济，是有风险的任何行动。

We're on the same wavelength.

我们是同道中人。