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1)  unsteady wind field
非定常风场
2)  confused wind
非定常风
1.
Ship manoeuvering response equation in confused wind was derived,and by means of the theory of linear system in stochastic processes,the problem of keeping course by rud-der force when ship sailing in confused wind was dealt with.
推导了船舶在非定常风中的操纵运动响应方程式,并利用随机过程的线性系统理论,讨论了船舶在非定常风中航行时的舵力保向问题。
3)  unsteady wind tunnel
非定常风洞
1.
The instantaneous vortex structure of the leading-edge vortices on a delta wing in unsteady free stream is investigated via particle image velocimetry in unsteady wind tunnel of NUAA.
在南航非定常风洞中,运用PIV测量技术,研究了非定常自由来流下三角翼前缘涡瞬时涡结构的变化。
2.
A pitching test set-up, used in the unsteady wind tunnel at Nanjing University of Aeronautics & Astronautics, is developed to study the effect of rapid changes on both the free stream velocity and the angle of attack.
在南京航空航天大学已建成的国内首座非定常风洞内,研制了一套单自由度俯仰振荡实验装置,设计开发了一套对模型姿态和来流风速进行联合控制的软件。
3.
In this paper, the effects of unsteady free stream on aerodynamics of an aircraft model are studied in the unsteady wind tunnel of NUAA.
在国内首座非定常风洞中,研究了不同幅值、不同频率脉动的非定常自由来流对飞机模型气动特性的影响。
4)  unsteady flow field
非定常流场
1.
A new dynamic overset unstructured grids method is developed to simulate the unsteady flow field a-round helicopter.
为验证本发展的预处理解算器以及动态非结构重叠网格的算法的可信性和有效性,开展一系列的数值实验,模拟了不同速度范围的NACA0012翼型绕流,Caradonna旋翼悬停和前飞流场以及Robin直升机机身-旋翼组合的前飞非定常流场,结果表明采用本文算法得到的结果是可信的,网格处理是自动高效的,可以应用于直升机全机流场模拟,为直升机设计提供可信指导数据。
2.
Having worked out a lot of technique problems, this paper reports quasi-3D LDV measurements of unsteady flow field in a rim sealing of a turbine stage.
针对轮缘封严内空间狭窄、光路安排困难等问题,本文发展了一种用于测量涡轮级轮缘封严内非定常流场的准三维LDV技术,即测量分两步,首先在机匣上安置二维测速系统用符合方式测出径向、切向速度及湍流度,再在轮毂内安置一维探头重复测量,从两次测量数据中计算出轴向速度;该技术借助锁相采样等技术能测出不同动静叶相对位置情况下封严及盘腔内的周期性非定常流场细节,本文给出了部分典型的动态流场测量结果。
3.
The numerical simulation of the unsteady flow field around an oscillating airfoil is difficult because of the complexity of turbulence models and numerical methods.
准确数值模拟机翼动态失速时非定常流场主要有湍流模型和数值算法两方面的难点。
5)  unsteady flow
非定常流场
1.
The wake flow of stator vanes and the unsteady flow in the passage of rotor blades were solved by using oscillating fluid mechanics theory and parametric polynomial method.
采用参数多项式方法和振荡流体力学理论,求解静子叶片后的尾流场及尾流场作用下转子叶片通道内的非定常流场。
2.
The three-dimensional unsteady flow field in a centrifugal fan is numerically simulated,where Navier-Stockes equations are adopted and RNG k-epsilon turbulence model is chosen.
此外,还尝试运用一种新的方法,即不用求解声场而直接依据非定常流场中的静压脉动分析了蜗舌处主要气动噪声源的位置及其成因。
3.
The unsteady flows in a agitator are calculated numerically, and compared with the author′s experimental data.
研究了搅拌器内非定常流场的分布 ,并与实验结果做了比较 。
6)  unsteady flowfield
非定常流场
1.
Implicit finite volume TVD schemes improved by the dual-time stepping method are applied to numerically simulate unsteady flowfield over high-speed spinning SOCBT projectile with attack angle.
采用Jameson提出的双时间推进方法改进的隐式有限体积TVD数值格式,对有攻角高速旋转SOCBT弹丸非定常流场进行了数值模拟。
补充资料:常风
1.长期刮风。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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