2) atmospheric turbulence

大气紊流
1.
Firstly,equations of motions of aircraft short period in consideration of atmospheric turbulence,pilot model,Dyrden atmospheric trubulence model and the mathematics model of Pilot-aircraft closed-loopsystem are founded.
首先建立了大气紊流下的飞机本体短周期运动方程、驾驶员模型、Dyr den大气紊流模型及人机闭环系统模型 ;然后利用Matlab软件在时域内进行了数值仿真 ,仿真结果表明 ,对于装有电传操纵系统的飞机来说 ,大气紊流对驾驶员诱发振荡的影响不明显。
2.
This paper establishes the atmospheric turbulence model of agricultural aircraft flying at minimum altitude.
在建立农林飞机超低空飞行时的大气紊流模型基础上,结合频域和时域两种计算方法研究了各种不同紊流强度下的大气紊流对农林飞机超低空飞行的影响,同时采用加速度综合评分的方法对其影响进行定量评估,最后给出了大气紊流对农林飞机超低空飞行影响的规律,对工程应用有一定的参考价值。
3) inlet turbulence

进气紊流
1.
This paper is focused on the aeroacoustic properties of low speed axial fan running in inlet turbulence with high intensity and small correlation scales.
详细描述紊流进气条件下低速轴流风机的气动噪声的试验和理论研究气动试验包括测量了三种不同紊流进气条件下风机进口的紊流强度、紊流尺度、风机叶片的尾迹宽度以及平均速度、压力等参数声学试验包括测量了风机排气端的总声级和1/3倍频程频谱理论上首次把尾涡脱落和进气紊流结合起来完整地研究了风机的宽频噪声,给出了轴流风机宽频源的声压谱密度函数的表达式,在计算叶片脉动力时,首次采用可分离的波数函数模型,使得计算过程大为简化理论和试验都表明,尾涡脱落和进气紊流同是风机的主要声源,相对而言,紊流进气对噪声的影响要大于尾涡脱落,其中紊流强度是影响风机噪声的最主要参
4) Turbulence
[英]['tɜ:bjələns] [美]['tɝbjələns]

紊流度
1.
Based on the data of a turbofan engine inlet total pressure distortion experiment, the methods to predict inlet dynamic pressure turbulence were studied.
通过对某型涡扇发动机进气总压畸变流场动态总压紊流度的计算,得到了在改变采样频率以及设计不同的数字滤波器对动态总压紊流度计算的影响结果,为分析和处理动态数据提供了一种方法。
2.
In order to study the effect of plasma assisted combustion,the combustion products of methane-air mixture and trend of turbulence at exit of combustor were investigated by numerical simulation and analyses.
为了研究等离子体的助燃效果,以CH4与空气的混合气为对象,对燃烧产物和燃烧室出口流场的紊流度进行了数值模拟分析。
5) turbulence intensity

紊流强度
1.
The turbulent characteristics,including turbulence intensity,gust factor,integral length scales and wind spectrum,were summarized based on a large amount of measured data,and compared with Code ones.
采用现场实测的方法对上海市崇明岛侯家镇气象站的近地中强度脉动风特性进行分析研究,对紊流强度、阵风因子、紊流积分尺度的统计值与规范结果进行了比较,对水平方向和垂直方向常用的几种功率谱密度函数进行了拟合修正,提出了精度优于常用风谱的谱函数表达式。
2.
The conceptual experiment has been done in a flume,and the three-dimensional ultrasonic Doppler speedometer ADV is used to measure the 3-D flow field and the turbulence intensity field around a round-ended pier.
分析有桥墩时的紊流强度垂向分布及有、无桥墩时紊流强度比值的横向分布变化,分析结果表明,垂线上紊流强度最大位置在0~0。
3.
After analyzing the measurement data recorded from 13:00 10~(th) March to 16:00 10~(th) March 2007,we have induced some strong northern wind characteristics relating the wind speed and direction,the turbulence intensity,the turbulence integral scale and the power spectrum,etc.
本文通过对北京时间2007-03-10 T13:00~2007-03-10 T16:00期间的实测强北风风速风向数据的分析,得到了该时段的风速和风向、紊流强度、紊流积分尺度、紊流功率谱密度函数等强风特性。
6) turbulence intensity

紊流度
1.
Velocity distribution on a rough bed is more non-uniform than that on a smooth bed, the turbulence intensity distribution of non-uniform flow becomes uniform with increase of the relative depth, and the regularities of the roughness coefficients of non-uniform flow on a rough bed are.
粗糙床面非均匀流的水槽试验表明,非均匀流断面的垂线流速分布需用两个对数公式分别描述;粗糙床面的流速分布较光滑床面不均匀;非均匀流的紊流度分布随相对水深的增大而趋于均匀;粗糙床面非均匀流糙率系数的变化规律与光滑床面近似。
补充资料:气流
1.流动的空气。 2.由肺的膨胀或收缩而吸入或呼出的气﹐是发音的动力。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条