1) vortex method
涡法
1.
hybrid finite difference method and vortex method (HDV), which is based on domain decomposition and proposed by the authors (1992), is improved by using a modified incomplete LU decomposition conjugate gradient method (MILU-CG), and a high order implicit difference algorithm.
本文采用以修正的不完全LU分解作预处理器的共轭梯度法(MILU_CG),结合高阶隐式差分格式,改进了作者(1992)提出的基于区域分解、有限差分法与涡法杂交的数值方法(HDV)·系统地研究了雷诺数Re=1000,200,旋转速度比α∈(05,325)范围内,绕旋转圆柱从突然起动到充分发展,长时间内尾流旋涡结构和阻力、升力系数的变化规律·计算所得流线与实验流场显示相比,完全吻合·首次揭示了临界状态时的旋涡结构特性,并指出最佳升阻比就在该状态附近得
2.
A hybrid finite difference and vortex method, which is based on domain decomposition and proposed by the authors (1992), is used forcalculating the flow around a rotating circular cylinder at Reynoldsnumber Re=1 000 and the rotation velocity ratio a∈(0.
采用作者提出的基于区域分解、有限差分法与涡法杂交的数值方法,结合高阶隐式差分格式,和以修正的不完全LU分解为预处理器的共轭梯度法作求解器。
2) eddy current method
电涡流法
1.
A new eddy current method is proposed which can be applied for concrete early age shrinkage(3 d) measurement without constraint conditions.
研制了一种无约束条件下测量混凝土早龄期收缩的新方法———电涡流法。
2.
The eddy current method was used in the measurement of axial clearance in scroll compressor.
介绍了电涡流法测量位移的基本原理和性能,设计了静态校正系统,对电涡流位移传感器进行了静态特性测试,并对不同测试材料的输出特性进行了试验对比。
3) discrete vortex method
离散涡法
1.
Two computed models and a numerical method based on nonlinear discrete vortex method are presented to simulate the vortex flow about wing-body combinations.
论述了用非线性离散涡法来模拟大迎角下翼-身组合体涡流绕流的计算模型及计算方法;给出了一个典型翼-身组合体的涡流流态计算结果及其非线性气动特性和截面压强(或载荷)分布。
4) eddy current method
涡流法
1.
Through practical eddy current testing,it shows that eddy current method can fine failure position quickly in repairing,and can improve efficiency and provide safeguard.
通过采用涡流法进行实际检测证实:在压缩机中间冷却器检修中采用此法可快速找到问题部位,为检修提高了效率,也为设备安全运行提供保障。
2.
The principle,applicability range,advantage and disadvantage of electromagnetic,eddy current method、βbackscatter method and XRF methods for nondestructive testing coating thickness of material have been reviewed.
综述了用于覆盖层厚度无损测量的电磁性法、涡流法、β背散射法和X射线荧光法的方法原理、适用范围及优缺点,并对相关仪器、厂商及仪器的发展趋势进行了评述。
5) vortex lattice method
涡格法
1.
The propeller blades are calculated with a vortex lattice method, while the pod including its strut with a boundary element method for non-lifting bodies.
性能理论计算中螺旋桨采用升力面理论涡格法 ,吊舱采用面元法 ,对螺旋桨与吊舱的相互影响进行了时间平均及迭代处理 。
2.
The propeller blades are calculated by a vortex lattice method, while the pod including its strut by a boundary element method for non-lifting bodies.
螺旋桨采用升力面理论涡格法、吊舱采用面元法分析计算 ,二者的相互干扰通过叠代计算来处理。
3.
In this method a potential -- based panel method isemployed for solving the flow around the duct and propeller hub and a vortex lattice method.
本文提供了一个带前置或后置定子导管螺旋桨水动力性能的数值计算方法,本方法采用面元法求解绕导管和桨毂周围的流动、而螺旋桨叶和定子周围的流动则用涡格法来求解。
补充资料:涡流法监测
分子式:
CAS号:
性质:金属设备材料腐蚀产生缺陷的一种在线监测方法。用交流磁场在导电材料中感应出涡流,涡流的大小和分布与缺陷的大小和分布有一定关系,通过传感探头和检测仪器即可测出缺陷的大小和部位。该法可监测孔蚀、晶间腐蚀、应力腐蚀破裂,甚至可以测出壁厚的均匀腐蚀减薄,还可以测试钢铁的渗碳情况,例如测定乙烯转化炉管渗碳层的深度和分布。
CAS号:
性质:金属设备材料腐蚀产生缺陷的一种在线监测方法。用交流磁场在导电材料中感应出涡流,涡流的大小和分布与缺陷的大小和分布有一定关系,通过传感探头和检测仪器即可测出缺陷的大小和部位。该法可监测孔蚀、晶间腐蚀、应力腐蚀破裂,甚至可以测出壁厚的均匀腐蚀减薄,还可以测试钢铁的渗碳情况,例如测定乙烯转化炉管渗碳层的深度和分布。
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