The Application of the dual-time method in Calibrations of the Pulse-Type Flow Transducers;
双时间法在脉冲型流量传感器检定中的应用
This paper simulates the process of an air-launched missile traversing across a shockwave, using a dual-time method based on a motive chimera grids and the K-ω turbulent model.
该文采用基于动态嵌套网格技术上的双时间法,模拟了飞行器导弹发射时的粘性流场和导弹气动性能的变化,湍流模型为K-ω两方程模型。
The computational results achieved by four-stage Runge-Kutta scheme and dual-time method were compared through numerical simulation unsteady harmonic oscillating flow around sphere-cone.
为适用于非定常流场计算 ,在保证时、空二阶精度的前提下 ,通过引入变系数残值光顺技术 ,提高了四步Runge Kutta方法的计算效率 ;并针对球锥简谐振动过程 ,数值比较Runge Kutta多步法和“双时间法”的计算精度。
A dual-time stepping approach extends thisalgorithm to unsteady flows.
预处理后的N-S方程,用二阶迎风格式的有限体积法离散,隐式、LU-SGS迭代求解,双时间步推进求解非定常流。
The stability,starting problem,initial value of sub-iteration and convergence criterion of implicit iteration of the dual-time stepping method are studied.
对双时间步方法隐式迭代的稳定性、启动问题、子迭代初值和收敛性准则进行分析。
The method is based on a dual time-stepping scheme in conjunction with low Mach number preconditioning and an implicit LU-SGS iteration.
控制方程在非结构的动态网格上用双时间步推进并用隐式、LU-SGS 迭代求解;双重 Delaunay 图映射的网格变形技术和非结构嵌套网格方法结合使用,解决既有整体大幅运动,又有局部柔性变形的复杂运动边界问题。
The method is based on the synthetic method of double time domain and four spectrums.
为了综合提高诊断能力,突出信号特征,本文介绍了一种信号分析与故障诊断新方法,该方法以“双时域四谱”综合诊断法为理论基础。
By means of dual-time stepping method and moving grids technique, we solved the 3-D unsteady Euler equations for helicopter rotor in forward flight, and obtained the near-field HSI noise.
采用“双时间法”求解了旋翼绕流的三维非定常欧拉方程。
Design of Cache-AMBA Bridge with Two-Clock Input;
双时钟输入的Cache-AMBA桥设计
Research on Bi-temporal Periodic Data Model;
双时态周期数据模型的研究
The system enhances the precision of flowmeter counter greatly,using multi-period synchronous measurement theory and double-time counting theory by hardware.
该系统应用多周期同步测量原理和硬件双时计数原理对流量计输出信号进行计数 ,大大提高了流量计脉冲的计数精度 ,并利用动态链接库 (DLL)实现了Windows操作系统对温度、压力的实时数据采集和系统监
Purpose: To study the diagnostic value of two-phase spiral CT in intrahepatic peripheral cholangiocarcinoma (IPC).
结论 :边缘型肝胆管癌的特征性CT表现为肝动脉期及门静脉期菲薄、不连续的环形轻度增强 ,在双时相间变化不明显。