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air drag     
相关语句
  空气阻力
     The relation between grain air drag coefficients and the relative velocity of grain has been determined when the relative velocity coefficients on air flow and graina ranges 3~25m/sec.
     测定了当气流与谷粒的相对速度为3~25米/秒时,谷粒空气阻力系数与相对速度之间的关系。
短句来源
     The factor concerning the effect of thickness of malt on air drag has been tested and analysed during malt drying in this article.
     通过对大麦芽干燥过程麦层空气阻力的实验分析,明确了大麦芽对空气的阻力与麦芽含水量、麦层厚度和风速的数量关系,并由此建立了数学模型.
短句来源
     Automobile and motorcycle fuel saving mainly depends on the structure type and technical performances of vehicle itself which include vehicle curb mass, transmission efficiency, air drag, rolling resistance, matched engine structure type, ignition system, compression ratio, and charging effciency of valve timing system.
     分析了汽车和摩托车车辆本身的结构型式和技术性能与燃油消耗的关系 ,其中包括车辆自身质量、传动效率、空气阻力、滚动阻力以及所配用发动机的结构型式、点火系统、压缩比及配气系统的充气效率等 ;
短句来源
     Air Drag Characteristics of the Damper of a One-Dimensional Trajectory Correcting Fuze in a Mortar Shell
     迫弹一维弹道修正引信阻力器结构的空气阻力特性研究
短句来源
     Approximate Solution of Spatial Balloon Curve Caused by Air Drag in Ring Spinning Process
     空气阻力所形成的环锭纺气圈空间曲线近似解
短句来源
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  气流拉伸
     Research progress in air drag of polymer spunbonding process and performance of hydroentangling jets
     聚合物纺粘气流拉伸与射流性能的研究进展
短句来源
  大气阻力
     Using the analytical model of air density proposed by the authors of this paper, a new set of formulae for eomputing the air drag perturbation of artificial earth satellite have been deduced. They suit the orbit with small-eccentricity as 0≤e≤0.3.
     本文采用作者提出的大气密度分析模型,导出了人造地球卫星大气阻力摄动新的计算公式,它适用于0≤e≤0.3的各种近地卫星。
短句来源
     A COMPUTATIONAL METHOD OF THE PERTURBATION THEORY IN THE AIR DRAG OF ARTIFICIAL EARTH SATELLITE
     人造卫星大气阻力摄动理论的一种计算方法
短句来源
     As a comparatively later established atmospheric model,J77 seems so conspicous that it is usually taken into consideration as far as air drag perturbation is concerned.
     而J77是较后形成的模型,它在大气阻力的研究中往往备受关注。
短句来源
     In this paper the main performance parameters of laser propulsion engine was analyzed. Such problems as the optimum specific impulse,the average laser power and the energy consumption of electric current for launching in 2D plane without air drag were addressed.
     讨论了激光推进发动机性能参数,飞行器在无大气阻力并忽略地球曲率和自转条件下发射与入轨所要求的最佳比冲,激光平均功率与电网能量消耗等问题。
短句来源
     This paper proposes a new method for computing the short period perturbation in sa-tellitic orbit caused by air drag, and the air density model is assumed to be exponential.
     本文对大气密度的指数函数分析模型,提出了一种新的计算人造卫星大气阻力摄动中短周期项的方法。
短句来源
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  “air drag”译为未确定词的双语例句
     n experimental investigation was conducted for the air drag characteristics of a finned tube air cooler with 16 rows,26 rows,and 32 rows respectively,and the results were compared with the calculating results of the calculating formulae of the common air drag of air coolers.
     对管排数分别为16排、26排和32排的翅片管空气冷却器风侧阻力特性进行了试验研究,并将其试验结果与空气冷却器常用风阻计算公式的计算结果进行了比较与分析。
短句来源
     Comparison of Air Densities from Air Drag upon Artificial Satellites With Models MSIS and CIRA 1972
     由卫星阻力测定的大气密度值与MSIS和CIRA1972模式的部分比对
短句来源
     New Progress of the Study on the Mechanism of the Air Drag in the Melt Blown Process
     熔喷非织造气流拉伸机理研究的新进展
短句来源
     In this paper air densities are determined by using the air drag data of several Chinese satellites and are compared with models MSIS and CIRA 1972 respectively.
     本文利用我国卫星的阻力资料测定的大气密度值,分别与MSIS和CIRA1972模式进行比对.
短句来源
     Progress of the Study on the Mechanism of the Air Drag in the Spunbonding Process
     纺粘非织造过程气流拉伸机理研究进展
短句来源
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  air drag
In first tests the shaft rotated with a speed of 12 000 rpm limited by air drag.
      
The effect of filter material manufacturing technology on its initial air drag is a function of the choice of the criterion used for assessing the structure of the materials to a great degree.
      
Air drag effect on the motion of an artificial Earth satellite
      
The variations of perturbations in perigee distance for different values of the orbital eccentricity for artificial Earth's satellites due to air drag have been studied.
      
Variations of perturbations in perigee height with eccentricity for artificial Earth's satellites due to air drag
      
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An analysis showing the motion law followed by grain moving in vertical air flow is developed in this article. Experiments on air drag coefficients of various grain have been carried out on a test bed. The relation between grain air drag coefficients and the relative velocity of grain has been determined when the relative velocity coefficients on air flow and graina ranges 3~25m/sec. The air drag coefficient is established indirectly: first measure out through photoelectronic method the...

An analysis showing the motion law followed by grain moving in vertical air flow is developed in this article. Experiments on air drag coefficients of various grain have been carried out on a test bed. The relation between grain air drag coefficients and the relative velocity of grain has been determined when the relative velocity coefficients on air flow and graina ranges 3~25m/sec. The air drag coefficient is established indirectly: first measure out through photoelectronic method the grain moving timeon vertical air flow, then the calculat value of ding coefficient according to formula. Soybean, corn, rice, wheat and sorghum have undergone experiments.The experiment results show that when the relative velocity on air flow is higher than 6m/sec, the drag coefficient varies slowly with the relative velocity, and its difference would be no more than 10% in mentioned experiment range. However, when the relative velocity is lower than 6 m/sec, the drag coefficient would increase remarkably with the decrease of relative velocity. It means the force exterted by air flow on grain would no longer be proportional to the square of the relative velocity.

本文分析了谷粒在垂直气流中的运动规律,并且在实验台上对各种谷粒的空气阻力系数进行了实验研究。测定了当气流与谷粒的相对速度为3~25米/秒时,谷粒空气阻力系数与相对速度之间的关系。空气阻力系数是用间接方法得到的,先用光电的方法测出谷粒在垂直气流中的运动时间,而后利用公式计算出阻力系数的值。共实验了大豆、玉米,高粱、小麦和水稻等五种谷粒。实验表明,当气流和谷粒的相对速度大干6米/秒左右时,阻力系数随相对速度的变化很小,在实验范围内差别不大于10%,即气流对谷粒的作用力大致正比于相对速度的平方。但相对速度小于6米/秒时,随相对速度的降低,阻力系数迅速增加。

In this method, the indefinite influence of air drag on the motion of an artificial satellite is simply represented with one parameter, which enables us to search for and identify the satellite in a simple way, when the satellite is missed owing to the influence of air drag.

本方法用单独一个参数简单表示大气阻力对人造卫星运动的不确定影响,以便当卫星因受大气阻力影响而丢失时,用简便易行的方式对它进行搜索和证认.

Using an effective semi-analytic method, we obtained the first order solution of orbtital perturbation for the near earth satellite, including the disturbing effects of the earth's figure and air drag, these effects are of same order of O(10~(-3)). The formulae of calculation are not complicated, and the speed of calculation is faster then the usual numerical method.

本文提出一种有效的半分析方法,给出近地卫星轨道在地球形状摄动和大气阻力摄动同样显著情况下的一阶解,相应的计算公式并不复杂,而计算速度要比数值方法快。

 
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