1) critical confining pressure
临界围压力
1.
According to the characteristics of double wall corrugated filter well pipe and its failure,a calculation formula of its critical confining pressure was induced by using elastic stability theory.
针对双壁波纹塑料滤水管的结构及破坏特点,应用弹性稳定理论,推导了该种管材的临界围压力计算公式,并分析其影响因素,确定了实际耐围压能力。
2) critical pressure
临界压力
1.
New theory in the front of theoretical basis research of molecular thermodynamics 4: on molecular structure of organic compound and theoretical equation of critical pressure;
分子热力学前沿基础领域中的新理论4:论有机纯质的分子结构与临界压力理论方程
2.
Prediction of the critical pressures of alkanes using a quantitative structure property relationship;
应用QSPR方法预测烷烃的临界压力
3.
The critical pressure of two spans beams with one end fixed and the other hinge joined;
一端固支一端铰支二跨梁屈曲的临界压力
3) critical load
临界压力
1.
The curvature formula of tiny curved rod,together with the vector method of area,is applied to inference for Euler formula about critical load of slender compressive rod which one end is fixed and another is free.
利用杆件微弯的曲率公式和面积向量法,求得一端固定、一端自由压杆的临界压力欧拉公式,为该约束条件下细长压杆的临界压力公式推导提供了另一种方法。
2.
And then,the equations are applied to inference for Euler formula about critical load of slender compressive rod with common constraints.
利用细长压杆微小弯曲的平衡条件和曲率计算公式,得到了统一的压杆转角方程和挠曲线方程,并将其用于几种常见支承条件的细长压杆,方便地求得了相应压杆的临界压力欧拉公式。
3.
In elastic mechanics, it is common practice to calculate critical loads in buckle of thin plates by means of double triangle series.
弹性薄板屈曲的临界压力计算,在弹性力学中一般都是采用双三角级数解法,计算过程比较复杂,工程中应用不方便。
5) supercritical pressure
超临界压力
1.
Measurements of coefficient of convective heat transfer for endothermic hydrocarbon fuel up to supercritical pressures.;
超临界压力下吸热型碳氢燃料的对流给热系数测定
2.
Analysis and countermeasures of steam-excited vibration of supercritical pressure steam turbine;
超临界压力汽轮机蒸汽激振问题分析及对策
3.
In order to explore the underground heavy crude over 2000 meters in depth,a project of steam injection for supercritical pressure steam generator was designed and compared with the project of hot water injection by raising pressure of the former set hot water boiler.
为了解决埋深超过 2 0 0 0m的深层稠油开采难的问题 ,提出了一种超临界压力蒸汽发生器的开采方案 ,并与其他注汽方案进行了比较 ,同时研究了超临界压力热流体在地面管线和井筒中流动的规律。
6) critical pressure differences
临界压力差
1.
Various temperatures and pressure differences through simulated test of determination HDPE bottle's deform during two sterilization processes were tested and the critical pressure differences between the inside of a HDPE bottle and its aluminum foil seal were gained.
在此基础上测试得到了 HDPE瓶及其铝箔封口的临界压力差。
2.
The paper establishes dualitic regression equation among HDPE bottle's deform degree, various temperatures and pressure differences through simulated test of determinating HDPE bottle's deform degree during two sterilization processes;and gains the critical pressure differences between the inside of a HDPE bottle and its aluminium foil seal.
在此基础上测试得到了HDPE瓶及其铝箔封口的临界压力差。
补充资料:超临界压力锅炉
超临界压力锅炉
supercritical pressure boiler
ehoollnJ一e yol一guolu超临界压力锅炉(supereritieal pressure boil-er)主蒸汽压力超过临界压力22.12 MP。的锅炉称为超临界压力锅炉。通常大容量超临界压力电站锅炉的主蒸汽压力定在24.5 MPa左右,也有比之更高的。当主蒸汽压力达到27 MPa以上时(见蒸汽参数),又称为超超临界压力锅炉(ultra super eritiealPressure boiler)。发展超临界或超超临界压力机组都是为了更有效地提高火力发电厂的经济性,因此对超临界压力锅炉还伴随着采用更高的汽温和更大的锅炉容t。 妞临界压力锅炉技术特性由于水和蒸汽的压力超过临界压力后不可能有汽水双相混合物共存,因此超临界压力锅炉只能采用没有锅筒的直流锅炉。超临界压力也体现了当代电站锅炉最先进的技术。与亚临界锅炉相比,由于蒸汽参数更高,因此在锅炉受压元件的设计时需要采用更高等级的材质,并需要更完善的强度设计和寿命分析;由于它是直流锅炉,因此其水冷壁系统的设计与锅筒式锅炉有很大区别,并且还需要设t一套起动系统;由于超临界压力锅炉往往采用变压运行,因此在锅炉性能设计时还要兼顾超临界和亚临界各种不同运行工况时的特点,保证锅炉安全经济运行。此外,超临界压力锅炉在给水品质、自控以及防止高温部件高温腐蚀等方面,都有着更高的要求。 超临界压力锅炉水冷盛与亚临界压力锅炉相比,超临界压力锅炉最大特点体现在水冷壁系统的设计方面.当代超临界压力锅炉水冷壁设计必需体现超临界、直流锅炉与变压运行的三大要素.水冷壁管圈型式、质t流速、热偏差、流量分配等都是超临界压力锅炉水冷壁设计的关键因素。 水冷壁管圈型式超临界压力锅炉目前常用的管圈型式分为螺旋管圈和垂直管圈两大类型。螺旋管圈水冷壁管与水平线成一定倾角,从锅炉底部沿炉膛四周螺旋式盘绕上升,直至炉膛上部折焰角与炉膛出口处为止,通常盘绕1~2圈,螺旋倾角在100~2护之间。垂直管圈与通常的锅筒式锅炉相似,从冷灰斗至炉顶水冷壁管均作垂直布置,并且为满足变压运行需要,往往采用小管径一次上升式管圈。这两种型式在当代大容t超临界压力锅炉上都得到了广泛采用,二者在水冷壁结构设计、制造和安装等方面各有优缺点,但只要设计合理,都可以满足锅炉运行性能的要求。 质t流速超临界压力锅炉水冷壁管内质量流速的合理选取十分关键,是关系到锅炉安全经济运行的重要因素.对于螺旋管圈,可以通过合理选择管径、根数和姗旋倾角等来确定合理的质量流速。
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参考词条