本文以京沪高速铁路隧道项目为背景,对其相应的气动效应问题展开研究。
In this paper, the Beijing-Shanghai high-speed railway tunnel project is made as the background, study on its corresponding issues of the aerodynamic effect.
高速列车在进出隧道时,会产生一系列气动效应,以致于在隧道周围形成噪声污染,降低列车乘坐的舒适度。
When high-speed train going through tunnel, a series of aerodynamics effects will be created, which are harmful to passengers and environment.
由于地处高海拔地区,气压较低,因而作用在球上的阻力及升力所产生的空气动力效应也会发生相应反应,最终导致球在空中飞行速度比在低海拔地区快,飞行的路线也更直。
At altitude, the air pressure is lower, and so are aerodynamic effects such as drag and lift, ultimately causing balls to travel faster and straighter than they would at lower altitude.
气动光学传输效应对飞行器光学成像探测系统的性能有着十分重要的影响,它使探测器接受的图像产生偏移、抖动和模糊。
Transmitting effects of aero-optics is very important to optical imaging probing system of interceptor, as it may cause displacement, jitter and blurring of image to receive for the system.
研究了自由涡射流对透射激光产生的气动透镜效应,给出了计算结果。
The aerodynamic lens effect of laser beam through aerodynamic window is investigated and the conclusion is provided.
实验结果表明:当发生尾流撞击耦合效应时,压气机内部流动的时空结构以及时均气动性能均得到较大提高。
The results indicate that the time-space structure and the average aerodynamic performance can be improved greatly when the couple of wake impact effect is occurred.
介绍了超音速飞行器的气动光学效应,并讨论用数值模拟来研究和预测气动光学效应的方法。
The aero - optic effect of supersonic vehicle is introduced in the paper. The methods used for studying and predicating the aero - optic effect with numerical simulation is discussed.
试验结果表明,该模型在空气动力学特性变化强烈和动力学尾流效应起主要作用的地区有更准确的预测。
The result indicated that more accurate predictions are expected in situations where local aerodynamic characteristics strongly vary with time and where dynamic wake effects play a significant role.
结果表明,时序效应对静叶片气动负荷的影响明显高于动叶片的。
The results show that, the influence of stator clocking effects on the stator blade's unsteady aerodynamic loads is larger than that on the rotor blade.
最后,分析讨论类透镜效应对自由旋气动窗口的设计所带来的限制条件。
At last the limit conditions of the FADW design originated from lens-like effect are discussed and analyzed.
高速铁路隧道设计参数主要是由高速列车进入隧道所诱发的空气动力学效应确定的。
The determination of design parameters for tunnels on high speed railway is mainly affected by aerodynamic events arising from the running of high speed train in tunnels.
利用有限元分析结果,根据热光效应和弹光效应理论,对气动热环境下红外光学头罩的折射率场进行数值计算。
Based on the theories of thermo-optical effect and elastic-optical effect, the refractive index field of the dome was numerically computed with the result of the finite element analysis.
在大气动力学领域,主要介绍了非绝热波和大气低频动力学、湍流的频散效应和大气非线性波动等方向的研究进展。
First, in the field of atmospheric dynamics the developments in dynamics of diabatic waves and low frequency waves, the dispersive effects of turbulence and nonlinear atmospheric waves are reviewed.
通过采用外部声激励的方式,在低速轴流压气机内研究非定常尾流撞击效应对压气机流场结构以及时均气动性能的影响。
Influence of the wake impact effect on the flow field and its average performance in a low speed axial-flow compressor was investigated by using external acoustic excitations.
针对大跨度双幅桥面桥梁三分力系数的气动干扰问题,采用风洞试验方法对某在建大跨度双幅桥面桥梁的气动干扰效应进行研究。
The aerodynamic interference effects on aerostatic coefficients of twin deck Bridges with large span were investigated in details by means of wind tunnel test.
还讨论了风梯度的气动力效应。
The aerodynamic effects of the wind gradient are discussed in detail.
在轴流压气机三维气动稳定性模型的基础上,给出了考虑轴流压气机三维效应的主动控制模型及其传递函数。
Based on the 3d aerodynamic stability model, the related active control technique and the open-loop transfer function have been provided, in which the three dimensional flow effects are involved.
研究表明,对气动光学效应图像进行降晰函数辨识,可以有效地应用于气动光学效应的图像复原。
The research shows that a problem of image restoration of aero-optics effect can be resolved effectively by identifying blurs.
结果表明:缆索风荷载对悬索桥静风效应的影响比较显著,但对于空气动力稳定性则没有影响。
It is shown that the cable wind load affects remarkably the aerostatics of long-span suspension Bridges, but its effect on the aerodynamic stability becomes negligible.
应用排气动力效应通过改善扩散管结构,可使整机性能显著提高。
Use of exhaust dynamic efficiency and improvement of the diffusion pipe structure are conductive to lifting the engine performance.
研究表明,光船高速自旋产生的陀螺效应使光船姿态保持稳定,侧力和气动力阻尼的共同作用使光船具有稳定于光束中心的能力。
The results show that lightcraft's attitude stabilization is achieved by gyroscopic effect, and that due to the side force and the aerodynamic damp, lightcraft has the ability to ride a laser beam.
首先介绍了航天器再入飞行中遇到的真实气体效应问题及其对航天器气动特性所产生的影响。
Firstly, this article is reviewed the serious problems caused by real gas effects and spacecraft aerodynamics during the reentry of a spacecraft.
气动光学传输效应对飞行器光学成像探测系统的性能有着十分重要的影响,它使探测器接受的图像产生偏移、抖动和模糊。
The engineering model for optical transmitting characteristics of flow is built up and empirical model for optical imaging system induced by aero-optic transmitting effects is described.
通过算例表明,当这一三维旋转效应应用于叶片非定常气动特性计算时,能大大改善计算结果。
Calculational results of unsteady loads on the wind turbine blade show that the calculation is improved by the 3-d rotational effect.
主要介绍了在氢氧爆轰驱动高焓激波风洞中进行真实气体效应中催化效应对气动热影响的实验研究。
This paper is mainly concerned with the experiment exploration of catalyst effects on aerodynamic heat in real gas effects in JF-10 oxygen hydrogen detonation driving shock tunnel.
根据气动热力学、传热传质学、N - S方程,分析了战略导弹再入时端头帽烧蚀与碳颗粒的旋转效应,研究结果表明碳颗粒的旋转有利于防热。
The effect on circumgyration of carbon grain and the ablation of nose-tip during re-entry of stratagem missile is analyzed according to thermal transfer theory, thermo-aerodynamics and N-S equation.
在超音速飞行器的设计中,由于气动加热效应相当剧烈,考虑热效应的壁板颤振问题成为一个不可忽视的气动弹性问题。
Because of the drastic aerodynamic heating effect, panel flutter analysis considering thermal effects becomes an emerging problem in the design process of supersonic aircraft.
在超音速飞行器的设计中,由于气动加热效应相当剧烈,考虑热效应的壁板颤振问题成为一个不可忽视的气动弹性问题。
Because of the drastic aerodynamic heating effect, panel flutter analysis considering thermal effects becomes an emerging problem in the design process of supersonic aircraft.
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