常势

平面亚声速定常势流的最小二乘有限元法

Least squares finite element analysis of steady high subsonic plane potential flows

跨音速定常势流计算中的解不唯一问题

Nonunique solution problem in the computation of transonic potential flow

二维振荡机翼含激波跨声速非定常势流的变分原理

Variational Principle for 2-D Unsteady Fully Potential Transonic Flow with Shocks around Oscillating Airfoils

将非定常势流理论用于应急上浮运动流场分析与水动力计算。

The unsteady potential flow theory is used to analyses the flow field and hydro-dynamic calculation .

采用非定常势流理论对鱼类的尾鳍摆动推进功能进行了一系列的分析。

Based on the unsteady incompressible potential flow theory , the swimming performance of the caudal fin is further studied .

对气动特性，本文从线化小扰动速势方程出发，以定常势流格林函数方法为基础，结合数值算法和工程算法来进行计算。

For aerodynamic performance , the Green 's function method for steady aerodynamics is used as the basic method and the engineering method is used to compute the none lift drag .

超音速计算采用笛卡尔直角网格求解欧拉方程：亚音速计算采用定常势流的格林函数方法求解无粘气动力系数，粘性阻力采用工程估算的方法计算。

In supersonic case , 3D Euler equations are solved using Cartesian grid ; in subsonic case , inviscid aerodynamic coefficients are computed by steady potential fluid Greens Function Method , viscid drag is calculated by empirical formula .

平面定常位势流动中激波位置的确定

The fitting of shocks in steady plane potential flows

声激励下绕二维薄翼非定常位势流的理论分析

Theoretical Analysis of Unsteady Potential Flows Around Two-Dimensional Thin Airfoil Induced by Acoustic Excitations

关于平面定常位势流中的声速线

Sonic line in a steady plane potential flow

本文提出计算二维非定常位势流动的有限差分法，流动是因自由表面任意瞬间扰动所产生的。

A finite difference method is developed for computing the two-dimensional transient potential flow generated by an impulse on the free surface .

但由于可压缩非定常位势流动的控制方程是双曲型的，简单地把时间当作同空间一样的物理维来求解是不可行的。

Because the governing equations for compressible unsteady potential flow is hyperbolic , looking time dimension as space dimension in the same way is never appropriate .

本文使用了两种类型等参元，通过变分法，计算了三维机翼亚临界定常位势流中的压力分布，计算结果与试验结果符合较好。

In this paper , two types of isoparametric finite element are used to predict surface pressure distribution on the three dimensional wing which are placed in the subcritical steady flow by the variational FEM .

针对地（水）面效应飞行器的特点，分析了近水面波飞行时的流场特征，利用线性叠加原理，提出了飞行器与水面波耦合影响的非定常速度势修正项概念。

While a vehicle flying near surface waves , flow fields are analyzed based on ground ( water ) - effect vehicle 's features and the concept of corrective terms of unsteady velocity potential flow affected by vehicle-wave coupling is presented by means of a linear superposition principle .

以给定机翼模态分布下机翼上各点的模态值作为运动幅值，以三维非定常全位势方程和三维非定常Euler方程为控制方程，求解三维机翼简谐运动下的非定常气动力。

The wing is modeled structurally by vibrational modes , which are used as amplitude of motion by a finite element analysis . Conservative full - potential equation and three dimensional unsteady Euler equation are used to compute the unsteady transonic flows around airfoil and wings under simple harmonic motion .

用边界元法计算二维定常可压缩势流

The calculation of two-dimensional steady compressible potential flow by the boundary element method

用时间精确近似因式分解差分方法求解守恒型非定常全位势方程。

The conservative full-potential equation is solved by a time-accurate approximate factorization algorithm and internal Newton iterations .

在定常、有势、不可压流的前提下，对由回转体、附体围壳、十字翼和环形翼组成的潜体的水动力导数，采用奇点分布法进行了计算。

Hydrodynamic derivatives of a submerged body containing a rotational body , enclosing shell , cross foil and annular airfoil are calculated using the method of singular point distribution on condition that the fluid is steady and potential as well as incompressible .

跨音速纵向大扰动定常流的速势方程与线松弛

Potential Equation for Transonic Steady Flow with Large Longitudinal Disturbance and Line Relaxation

常航速船波势及船波阻力的边界元法

A Boundary Element Method for the Potential Problem of a Ship Moving Forward at Constant Speed

本文以非定常涡环速度势函数为基本解，应用时间历程方法，计算非共面机一尾翼组合体的非定常气动力性能。

In this paper , the subsonic unsteady aerodynamic performance of a noncoplanar wing-tail combination can be computed on condition that the velocity potential function of unsteady vortex ring is taken as an elementary solution and the method of time history ( MTH ) is used .

其中速度势被分解为定常和非定常小扰动两部分，并用跨音松弛法求解关于非定常扰动速势的空问变系数线性复变量微分方程。

In this method , the velocity potential is separated into steady and unsteady parts , and the linear complex partial differential equation with spatially variable coefficients for the unsteady velocity potential of small disturbances is solved using transonic relaxation procedure .