...定常流动，运用Runge-Kutta显式多步法进行时间推进求解，非定常流动采用隐式时间离散的“双时间法”(Dual-Time Stepping Method)进行推进求解。通过对二维圆柱、平板、翼型绕流的数值模拟，验证了本文方法的正确性和有效性。
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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。
参考来源 - 直升机旋翼气动噪声预测方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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。
Unsteady viscous flows over the gliding flap of Multi-element airfoils are simulated and studied by using the moving overlapped grids and the dual-time stepping method.
运用动态嵌套网格技术和双时间推进算法，对多段翼型襟翼滑动的非定常黏性流进行了数值模拟和研究。
The numerical method uses finite volume method in space and advances the solution in time using dual time stepping method.
空间采用中心平均的有限体积法进行离散，时间方向采用双时间法隐式推进求解。
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