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- The unsteady transonic flows around a pitching slender delta wing are simulated numerically with solving unsteady compressible Navier-Stokes equations by implicit finite difference TVD scheme. 用有限差分法求解N-S方程,数值模拟了细长三角翼作匀速上仰运动时的跨声速绕流流场。
- AN IMPLICIT DIFFERENCE SCHEME OF EULER EQUATION FOR UNSTEADY TRANSONIC FLOW 跨音速非定常流动的Euler方程隐式解
- NUMERICAL METHOD FOR SOLVING THE EULER EQUATION FOR UNSTEADY TRANSONIC FLOWS OVER OSCILLATING AIRFOILSS North-western Polytechnical University 振动翼型跨音速非定常Euler方程数值解方法
- In order to save expense and calculating time,we apply first-order approximate conditions to solve the unsteady transonic Euler equations coupled with aeroelastic equations. 计算网格采用静止的笛卡儿网格,通过薄翼和机翼小变形假设,使用一阶近似边界条件求解欧拉方程;由于文中方法在计算过程中不需要重新生成网格,节省了大量的时间。
- Jameson A. Transonic flow calculation [C]. MAE Report 1651,Prinston University. 傅德薰.;计算空气动力学
- Then the steady and unsteady transonic viscous flows are numerically simulated. The three-dimensional unsteady Navier-Stokes equations are solved by using the implicit LU-NND algorithm, with Baldwin-Lomax turbulent model. 从三维非定常Navier-Stokes方程组出发,采用LU-NND有限差分格式和Baldwin-Lomax湍流模型建立了一种数值模拟三维机翼、组合体和T型尾翼的跨音速定常及非定常粘性绕流的计算方法和程序。
- The drag of aftbody keeps constant in low subsonic flow, but increases in transonic flow due to the shock wave. 在低亚音速范围,后 体阻力基本不变化,随着马赫数增加至跨音速,出现激波阻力。
- Using direct coupling some results of viscous/inviscid interaction are given in both incompressible and transonic flow. 给出了不可压流动和跨音速流动中粘流/无粘流相互作用的某些正耦合的计算结果。
- A new and versatile algorithm for computing two-dimensional transonic flow using orthogonal stream-lines grids (SLG) has been developed. 本文给出了一种比较新型而通用的计算二维跨音速流动的数值算法 --正交流线网格法(SLG)。
- In transonic flow, a simple empirical formulation is given to predict the wave drag of upswept aftbody, which extends the usable range of Mach number. 在跨音速范围,给出了一种简 单的上翘后体波阻的估算方法,拓宽了马赫数的适用范围。
- Using the improved method we studied inviscid and viscous transonic flow in turbomachinery based on Euler and Navier Stokes equations. 计算结果表明,本方法是透平机械内部跨音速流动计算的强有力的手段。
- An effective multigrid method has been developed to accelerate the Euler solution of transonic flow for a helicopter rotor in hover. 发展了一种加快悬停旋翼无粘流场计算收敛速度的多重网格方法。
- Witcomb notes that "you could write lots of equations for subsonic flow and lots for supersonic flow, but for transonic flow things got so complicated that nobody could write any equations for it. 惠特科姆指出,“人们能够写出许多关于亚声速流动的方程,写出许多关于超声速流动的方程,但是,对于跨声速流动,由于情况极其复杂,当时还没有人能够写出有关跨声速流动的任何形式的方程。
- As examples, an quasi-one-dimensional nozzle flow with shock and the subsonic and transonic flow about NACA-0012 and NACA64A-10 airfoils are calculated. The results are compared with the experimental data and the other computed results. 文中分别对一维管流,二维绕NACA-0012和NACA64A-10翼型在亚声速和超声速来流的跨声速流场进行了计算,并将所得结果与有关实验和计算结果进行了比较,均符合良好。
- The theory of S1 and S2 stream surface was applied to calculate and analyze the internal transonic flow field for a two-stage axial turbine used in turbopump for liquid rocket engine. 摘要应用S1,S2流面理论对某大型液氢/液氧火箭发动机涡轮泵的两级轴流式涡轮内部跨声速流场进行计算和分析。
- In this paper, the adaptive parallel Multigrid algorithm is applied in solving transonic flow equation with large disturbance in the axial direction and small disturbance in the transverse direction. 本文运用自适应并行多重网格法求解了轴向大扰动、径向小扰动的跨音速方程。
- As validated in the present work in a number of transonic flows this method showed very promising performance. 本文对全速解法在二维层流的计算效果进行了考核,而后又将此算法在湍流跨音速流动中应用。
- The applications as carried out by DLR range from low speed flows to transonic flows, from high lift configurations to propellers and rotor. 德国宇航研究院)对这些技术的应用包括从低速流到跨声速流、从增升装置到螺旋桨和旋翼、从弹射装置和水塔储水罐尾迹流旋涡到三角翼上涡破裂现象等的研究。
- The present thesis summarizes the author's work on the shock wave/boundary layer inferaction phenomena and the associated passive controls in transonic flows. 本文作者对跨音速流动中的激波/边界层相互干扰及其控制进行了研 究。
- Traditional gust responses are mainly analyzed based on linear aerodynamic load calculations in frequency-domain,which is unsuitable for and the viscous and transonic flows. 传统的阵风响应主要在频域内进行分析,气动载荷基于线性方法计算,不能考虑黏性和跨声速流动影响。