Design of Multistage U Tubes For Returning System of Sealing Water for Feedwater Pump

给水泵密封水回水系统多级 U型 管设计

This model utility is featured as follows : it can be well used together with existing U type lamp tubes and exchanged simply quickly and safely .

本实用新型的优点是：能很好地与目前 U型 灯管相配合使用，且更换简单、快捷和安全。

The detuning of the intrinsic frequency of tubes the number of tubes in the calculation axial-flow and the curvature of U-tubes which influence on the critical velocity of tube arrays are studied carefully .

考虑了固有频率 改变、计算时 管数取值、纵向流存在以及 U 形管弯曲部分对流体弹性不 稳定性的影响；

The heat transfer process inside a borehole with symmetrically disposed double U tubes has been analyzed based on a quasi three dimensional model .

本文采用准三维模型对于对称布置的双 U型 埋 管地热换热器钻孔内的传热情况进行了分析研究。

Reflux condensation is studied in single inverted U tubes .

进行了单根 U型 管 内蒸汽冷凝回流实验。

Standard of Design and Calculation for the Application of PVC - U Tubes System in Chemical Engineering

PVC-U 管道系统在化工应用中的设计计算准则

U shaped tubes ;

U形 管；

Several problems of multistage U tubes for sealing water reclaiming system of feedwater pump including the estimation of sealing water height determination of water volume and the selection of flow velocity of multistage U tubes are described .

介绍了给水泵密封水回水系统多级 U型 管设计中的若干技术问题。对多级U型管水封高度估算、多级U型管水容积确定及多级U型管内水的流速取值等进行了探讨。

The lower part model consists of a tube sheet 441 U-shaped rods ( modeled on U-shaped tubes ) 9 tie rods a tube bundle wrapper a lower shell and some position bolts between the lower shell and the wrapper .

下部模拟体由管板、441根U形棒（模拟 U 形 管）、9根拉杆、管束套筒、下筒体以及下筒体和管束套筒间的一些定位螺栓所组成。

Investigation on water flow and heat transfer in U tubes of steam generator with natural circulation

自然循环蒸汽发生器 倒 U型 管 内 单相水流动及传热特性分析

This device consists of silic gel column activated charcoal column flowmeter conical flask U-tube nitrogen jar air pump and the connected tubes .

该提取装置简单，由硅胶柱、活性碳柱、流量计、锥形瓶、 U 形 管、液罐及各种连接 管构成，容易组装。