pitching moment

The flow field enlargement factor is lower than 1 under the given calculation condition and generate a smaller pitching moment .

在文中计算条件下，喷流放大因子小于1，并形成了较小的俯仰力矩。

High temperature effects have an important influence on the aerodynamic heating , the pitching moment characteristics and the communications of re-entry flight vehicles .

高温效应严重地影响了飞行器的气动加热、俯仰力矩特性和通讯传输。

A variable pitching moment is provided by moving the elevator .

俯仰力矩的变化由升降舵的偏转来提供。

Research on the modeling of pitching moment coefficient in transonic condition for flight vehicle

飞行器跨声速区俯仰力矩系数建模方法研究

The lift and pitching moment is improved and a good control capability is provided for the torpedo by fin and rudder .

鳍舵对雷体的升力和俯仰特性有显著提高，具有良好的操纵控制能力。

Based on slender body theory , an engineering method for estimating the heaving force and pitching moment and the vortex interference effects on the submarine is described .

基于细长体理论，提出了一种预测该升沉力和俯仰力矩及其涡干扰的工程方法。

The investigation illustrated that the aerodynamic lift and pitching moment of wing can be predicted accurately by CFD based on RANS approach with comparison to model tests .

结果表明与模型试验数据相比，基于RANS方程的CFD方法能够准确预报机翼的气动升力和力矩。

It takes the interference velocity undulation into account for the aerodynamic forces and pitching moment corrections to solve the difficult moment correction problem in high angle of attack tests .

修正中考虑了洞壁干扰修正量分布不均匀的影响，初步解决了大迎角实验洞壁干扰修正中最困难的力矩修正问题。

The aerodynamic drag , lift and pitching moment of the maglev train increase with the train speed . However , the magnitude of the increase varies with different calculation models .

随着车速的提高，气动阻力、升力和俯仰力矩均有较大幅度提高，不同的计算模型其提高幅度是不一样的。

The aerodynamic coefficients such as the normal force , axial force , and the pitching moment of the ve-hide computed by the local method are in good agreement with the experimental data .

由此计算出飞行器的法向力、轴向力和俯仰力矩系数，计算结果与实验数据相符。

A numerical method is given to calculate the unsteady lift , pitching moment and drag acting on an airfoil of rotors under attached-flow conditions in a compressible flow .

基于附着流状态下的旋翼非定常翼型气动模型，给出了计算该状态下的翼型非定常升力、阻力和俯仰力矩的数值计算方法。

The influence of nonlinear term to normal force coefficient and pitching moment coefficient caused by the detached air flow phenomenon in high angle of attack is mainly studied . The computing program related to this research is developed .

主要研究在大攻角下，气流分离现象所产生的非线性项对法向力系数和俯仰力矩系数的相互影响及其计算程序。

By the analytical method , the unsteady and steady pressure distribution on the fuselage surface , and the unsteady lift and pitching moment of the fuselage in a rotor interaction environment were calculated for different advance ratios .

应用该计算方法，分别计算了旋翼干扰状态下的机身表面点的非定常压强分布和机身的非定常气动升力、俯仰力矩随前进比的变化，以及干扰前后的机身定常压强分布。

In this water tunnel experiments , the results obtained at 20 ? cm / s for the roughness height 0.8 ? mm can be used to explained the scatter of the pitching moment curves obtained in the wind tunnel measurements .

水洞实验中，来流速度为20cms、粗糙高度为0.8mm时流态随攻角的变化规律可用来解释风洞实验结果中力矩曲线的分散性。

The past successful experience in calculation single grid fin is extended to the calculation and analysis of normal force , pitching moment , axial force and load distribution of grid fin missile configurations in subsonic , transonic and supersonic flow .

将单独栅格翼气动特性的计算推广应用于计算栅格尾翼导弹在亚、跨、超音速流中的法向力、俯仰力矩和轴向力系数以及载荷分布。

This paper presents a method of calculating the pressure distribution , lift , drag and pitching moment on cambered fuselage of arbitrary cross section at angle of attack by using the method of approximate conformal transformation within the limits of the slender theory .

本文在细长体理论范围内应用近似保角映射方法解决了具有弯度、迎角、任意横截面机身的压强分布、升力、力矩等气动力问题。

Aerodynamic effect on the Maglev vehicle was studied , and the aerodynamic shape and layout were designed optimally . The basic aerodynamics characteristics were concluded , and the aerodynamic aerofoil was useful for balancing the pitching moment of the Maglev vehicle .

通过磁悬浮发射空气动力影响分析，优化设计磁悬浮发射装置气动外形和气动布局，得出其基本气动特性，并提出利于实现系统俯仰力矩平衡的气动翼控制方案。

According to the characteristic of pitching moment coefficient in transonic condition through wind-tunnel test results , a probability function model is proposed to describe the influence of Mach number to pitching moment coefficient in this paper , and the genetic algorithm is used as the modeling iterative algorithm .

本文对此问题进行了研究，根据某空空导弹和某返回舱俯仰力矩系数在跨声速区体现出来的特点，提出并建立了俯仰力矩系数随马赫数变化的概率函数模型。

As concerning the rudder , the effect of real gas makes drag coefficient large , and both lift and pitching moment coefficients small for the case of small angle-of-attack and nonnegative rudder yaw-angle and large for the case of large angle-of-attack and negative rudder yaw-angle .

单就舵面而言，真实气体效应使其阻力系数增大，使其升力系数和俯仰力矩系数在小攻角且非负舵偏角时变小，在大攻角且负舵偏角时变大。

When analysing the longitudinal damping moment , not only should the pitching damping moment caused by the pitching angular velocity be considered , but the damping moment of the lag of wash caused by the angle of changing rate be calculated .

分析纵向阻尼力矩时，除考虑w＊z引起的俯仰阻尼力矩Mwzzwz外，还应估算出dαdt引起的洗流时差阻尼力矩Mαzα。