2) pore sealing
封闭孔隙
1.
Many pore sealing methods have been developed but they are all have shortcomings.
人们采用了许多封闭孔隙的方法,但都存在不足。
3) occlude crack
封闭裂隙
4) Clearance seal
间隙密封
1.
The method of clearance seal can achieve the effect of the seal between regenerator and cylinder wall while eliminating contact between them.
间隙密封的应用则可以在完成密封作用的同时消除接触磨损和因此而产生的污染。
2.
The clearance seal can achieve the effect of the seals while eliminating contact between them.
采用间隙密封,可以在完成密封作用的同时消除接触磨损和因此而产生的污染。
3.
It has been pointed out that the eccentricposition influences greatly the leakage of the clearance seal.
给出了回热式制冷机间隙密封泄漏率的数学描述，讨论了间隙泄漏率的影响因素，指出位置偏心是影响间隙泄漏率的重要因素，同时通过实验验证了间隙泄漏率的数学描述。
5) sealing clearance
密封间隙
1.
The influences of relief pipes of Francis hydraulic turbine on the flow field of the sealing clearance and its environs;
混流式水轮机减压管对密封间隙及其周围流场的影响
2.
The formula of radial sealing clearance for rotation error of orbiting scroll was founded.
根据曲柄销防自转涡旋压缩机的结构,从平面杆件机构的基本原理出发,分析了机构尺寸误差引起动涡旋自转误差模型,并建立了动涡旋自转误差对动、静涡旋密封间隙影响的计算式,通过算例对曲轴回转一周自转误差引起密封间隙的变化及对压缩机气密性、稳定性和安全性的影响进行了分析讨论。
3.
The causes of pressure fluctuation forming in the chamber & runner crown sealing clearance were analyzed.
以某电站机组为例,采用商业CFD软件对原型水轮机进行了三维全流道湍流数值模拟计算,分析了压力腔及密封间隙中压力脉动形成的原因,讨论了减压管的开、关状态对压力腔、转轮密封间隙和尾水管中流场的影响。
6) seal clearance
密封间隙
1.
Fluent was used in calculating labyrinth seal flow field and leakage flow rate, which are effected by labyrinth seal clearance, cavity depth and the structure,including straight through labyrinth seal and interlocking labyrinth seal.
应用Fluent软件计算迷宫密封间隙宽度和空腔深度以及直通式迷宫密封和错列式迷宫密封对迷宫密封流场和泄漏量的影响。
2.
The paper suggests a method of checking the radial seal clearance at hot ends of power plant boiler air preheaters, presents the preheater rotor s deformation as a function of the temperature, analyses some decisive factors that may affect the safety of the system s operation.
介绍一种电站锅炉空气预热器实现热端径向密封间隙控制的方法 ,给出预热器转子变形量随温度变化的关系 ,分析几种有关系统安全运行的重要因素 ,实践证明在较为完善的联锁保护下 ,根据转子变形量进行漏风控制是切实可行的。
补充资料：BCS能隙方程（BCSenergygapequation）
BCS能隙方程（BCSenergygapequation）
在通常情况下，BCS理论定义对势
Δ=-V〈ψ(r,↓)ψ(r,↑)〉
有能隙存在时它代表超导能隙，ψ为场算符，在弱耦合条件下（`N(0)V\lt\lt1`）给出的能隙方程为
$1=N(0)Vint_0^{\hbar\omega}(\epsilon^2 \Delta^2(T))^{-1/2}$
$*th[(\epsilon^2 \Delta^2(T))^{1/2}//2k_BT]d\epsilon$
式中N(0)为T=0K时费米面上一种自旋方向的态密度，V为电子间净吸引势的平均强度，$\hbar$和ωD分别是除以2π的普朗克常数和德拜频率，ε是以费米面为零点的电子能量，kB为玻尔兹曼常数。数值计算的Δ(T)与T的关系见下图，它与多数超导金属的实验结果符合甚好。
在T→Tc和T→0K时的近似结果为：
$\Delta(T)=\Delta(0)-(2\pi\Delta(0)k_BT)^{1/2}*e^{-\Delta(0)//k_BT}$
$(T\lt\ltT_c)$
$\Delta(T)=(1.74)\Delta(0)(1-T//T_c)^{1/2}$
$(T_c-T)\lt\ltT_c$
这里
$\Delta(0)=2\hbar\omega_Dexp(-1//N(0)V)$
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条