螺旋管

本文主要研究了带内螺旋缠绕管的管套管双面加热直流蒸汽发生器元件中沸腾段内螺旋管螺距设置的优化问题。

This paper focuses on the optimal pitch arrangement in double-side heating once-through steam generator with helix tube inside .

提高大口径PVC螺旋管粘接强度的措施

The Methods to Increase the Bonding Strength of PVC Helical Pipes with Large Sizes

PVC螺旋管的生产及改进

Processing and improvement of PVC helical pipes

螺旋管加热沼气池的实验研究和Fluent模拟

Experiment of Biogas Digester with Spiral Heating System and the Simulation with Fluent Model

HTR-10螺旋管直流蒸汽发生器实时动态模型

Real time dynamic model of helical coils in HTR-10 steam generator

系统的软件设计主要是通过GXDeveloper编程软件，对PLC进行软件编程，编写3050螺旋管生产线生产工艺流程中各设备的运行控制程序。

The software design of the system is PLC software programming to control the production process by the GX Developer programming software .

LCI型路缘石自动成型机薄臂螺旋管自动成型机的设计

Model LCI Curb Paver An Automated Forming Machine of Thin-Walled Helical Tubes

HTGR蒸汽发生器螺旋管内壁温分布和传热恶化规律的研究

Study on Wall Temperature Profile and Heat Transfer Deterioration in Helical Coils of Steam Generator of HTGR

涉县地震台山洞改造对DSQ水管仪观测精度提高介绍水平螺旋管逆流层析仪

The Observation Accuracy Improvement of DSQ Water Tube Tiltmeter of Shexian Seismic Station after Cave Reconstruction

采用焊道错位叠加方法，再现了螺旋管双面埋弧焊制管过程中内、外焊焊接热影响区（HAZ）的焊接热循环。

In this paper the HAZ weld thermal cycles of the welding by both sides submerged arc welded steel pipe were reproduced by the dislocation overlap weld method .

用修正L-M关系式整理了立式上升流动螺旋管内两相强制对流区放热系数，螺旋管在该区的放热系数大致范围为25-40kw／（m2·℃）。

Two-phase forced convection heat transfer coefficients are correlated as function of correctional Lockhart-Martinelli parameter , and the heat transfer coefficients at this region in helical-coiled tubes are about 25-40 kW / m2 ℃ .

本文讨论了Stanford大学所建造的自由电子激光器中所采用的新奇的螺旋管Wiggler磁场的有关特性，并着重分析了脉冲电流螺旋Wiggler磁体的主要参数和时间特性。

This paper analyses time character and the main parameters of a pulsed current solenoid system for wiggler field in free-electron laser and discusses the characteristics of the solenoid wiggler field .

对替代制冷剂R-134a在水平直管和螺旋管内的凝结换热特性进行了实验研究。

The characteristics of condensation heat transfer for R-134a in horizontal straight tubes and helical tubes were experimentally investigated .

通过关联实验数据，得到了计算临界含汽率的经验公式，为高温气冷堆（HTGR）螺旋管式蒸汽发生器的设计提供了必要的依据。

A correlation for predicting critical steam quality is derived , it can be recommended to be used for the design of steam generator of High Temperature Gas Cooled Reactor ( HTGR ) .

螺旋管内湍流对流换热利用RNGκ-ε湍流模型进行模拟，近壁处湍流利用非平衡壁面函数法处理。

The Renormalization Group ( RNG ) κ ε turbulence model was used to simulate the turbulent flow , and the turbulent flow near the wall was computed with the non equilibrium wall function method .

实验结果表明，R-134a在螺旋管内的凝结换热系数比直管的大4%~13.8%。

The results indicate that the condensation heat transfer coefficients in the helical tubes were 4 % - 13.8 % higher than those in the straight tubes .

分析结果表明，HTR-10蒸汽发生器在设计工况下运行时，不会发生流体弹性不稳定所导致的大振幅振动，也不会产生旋涡脱落引起的联锁共振；湍流激励对小螺旋管振动的影响很小。

The results is that : 10MW HTR steam generator is running at its design situation , the large amplitude vibration induced by fluid elastic instability does not exit , neither do by vortex shedding and random turbulence excitation .

同时本文还进行了一种满足300W冷负荷的微型螺旋管式蒸发器的设计，并给出具体设计过程和蒸发器的结构图，为实际加工提供了方便。

Meanwhile , one micro spiral-tube evaporator with 300W cooling load was designed and established . To facilitate the practical processing , the detailed designing process and the structure diagram of evaporator were presented .

在螺旋管预精焊法（二步法）生产中，预焊工序采用连续、粗丝、大电流的高速MAG焊方式，焊枪的性能和焊接工艺的优劣直接影响到钢管的生产效率。

In the two-stage production process of spiral pipe , a continuous , thick-wire , large current , high-speed welding method is used at the first process stage . And the performance of welding torch and the quality of welding technology directly affects the efficiency of steel pipe production .

10L容积的光生物反应器外观设计为三层框架式结构，螺旋管光照单元为16个。

The facade of the photobioreactor ( PBR ) with volume 10 liter was designed as three-layer frame , and the illumination units were increased to 16 . Using the PBR , continuous cultivation of Dunaliella salina was conducted .

卧式螺旋管汽液两相压力降脉动试验研究

Experimental investigation on pressure drop oscillation in horizontal helically coiled tube

螺旋管壁热传导问题的摄动解

Perturbation to the heat transfer problem in a helical tube wall

螺旋管内气液固三相流颗粒相分布规律

Particle phase distribution in gas-liquid-solid three-phase flow through helically coiled tube

螺旋管内单相及沸腾的强化换热与阻力特性实验

Experiments on Heat Transfer Enhancement in 3D Inner Finned Helical Pipe

输液螺旋管系振动的动力子结构分析

Dynamic Analysis of Spiral Tube System Conveying Fluid by Substructure Synthesis

螺旋管式蒸汽发生器的流动与换热特性

Flow and Heat Transfer Characteristics of the Helical Tube steam generators

水平定向钻进随钻测量系统研究与设计螺旋管耦合随钻测量系统

Research and design of a measurement-while-drilling system for horizontal directional drilling

螺旋管内外焊智能控制系统的设计与改进

The Project Design for Intelligence Control System of Spiral Welded Pipe

新一代的螺旋管厂简介

A Brief Introduction of the New Generation Spirally Welded Pipe Works

单相螺旋管圈动态特性研究

A Study of the Dynamic Characteristics of Single Phase Spiral Tube Coils