The test results indicated that all 3 kinds of nonsmooth surfaces can reduce the drag of bodies of revolution, the maximal reduction rate is about 5%.
对减阻率的分析表明,三种非光滑表面均能起到减小旋成体阻力的作用,总阻力最大减阻效果为5%左右。
Super-cavitation is created when gas bubbles are intentionally vented along all or part of an object travelling underwater so as to reduce the drag caused by a wetted surface.
当一个正在水下行驶的物体为了减小经由一个浸水面产生的阻力而沿其全身或局部部位有意排泄出气泡时,超空泡就产生了。
In order to enhance the stealthy ability and reduce the drag of an aircraft, the combination of the stealthy fuselage of plane abdomen with a submerged inlet is a good approach.
为了提高飞行器的隐身性能和降低其迎风阻力,采用具有平面腹部的低雷达截面外形机身与埋入式进气道的组合是一种良好的解决方案。
An experimental investigation showed that compared with a general external fins pipe, the new way can reduce the drag more than 40% and enhance the heat transfer about 10% meanwhile.
单管的实验研究证实,选用合理的绊条扰流结构,可使环翅管的绕流阻力降低40%,换热增强10%。
There are adaptations that increase the amount of forward thrust as well as those that reduce drag.
有增加前进推力的调整方法,也有减少阻力的调整方法。
Huxley speculated that a coat of hair would insulate against loss of body heat and might streamline the body to reduce drag in flight.
赫胥黎推测,一层毛发可以隔离身体热量的流失,并可能使身体呈现流线型,以减少飞行中的阻力。
There is little in the way of future predictions, apart from the suggestion that aeroplane wings may soon have bristles, a "fuzziness" that would reduce drag and therefore be more fuel-efficient.
他几乎没有对未来做预言,除了暗示飞机翅膀可能很快就会有短毛,因为这种“羽毛特性”会降低拖力,因而更节约燃料。
The software can work out, for example, the exact rate at which a plane should rise into thinner air (to reduce drag) as fuel burn makes it lighter.
比如,它能够计算出飞机向最薄的云层(以减轻阻力)上升的准确率,以减轻飞机自身重量。
These are evident in the fish’s speed (up to 70kph) and extreme swimming efficiency, evolution having honed its body to reduce drag and thus conserve strength during transoceanic migrations.
明显的是鱼的速度(最多70kph )和极端游泳效率,其身体结构的进化可以减少阻力,从而在海洋移动中保存了体力。
Vibrating in the wind, the bristles create some drag. But they also reduce the wing's slipstream, an area of low-pressure turbulence that pulls back on the wing, and hence reduce drag.
风中振动时,刷毛会产生反作用力,但同时它也可以减少机翼滑流,产生一个低气压乱流,机翼上形成回力,因而减小阻力。
Drag the Opacity slider to the left to reduce the effect of the filter.
将不透明度滑条向左移动会减弱滤镜的效果。
The new approach has helped Matthews and his colleagues reduce CPU time usage and has let the DBAs prevent problem queries from becoming a drag on performance.
新方法帮助Matthews和他的同事减少了CPU时间的使用,并让DBA 能够防止问题查询拖性能的后腿。
RSDS will control well path accurately, reduce torque and drag remarkably and improve hole cleaning condition obviously. The drilling practices of ERD will be more reliable if RSDS is used.
用旋转导向系统RSDS进行大位移井钻井,可望相当准确的控制井眼轨迹,大幅度减少钻柱所受的摩阻和扭矩,显著改善井眼的清洁状况。
It is very important to reduce the aerodynamic drag and noise for traveling vehicles.
减低汽车行驶中的空气阻力、抑制其行驶时的气动噪声具有十分重要的意义。
It is shown that the technique can obviously reduce the aerodynamic drag coefficient of the model.
结果表明:内部声激励能够明显地降低车身模型的空气阻力系数。
Research on drag reduction mechanism of supercavitation shows that supercavitation can reduce not only the friction drag coefficient but also the pressure drag coefficient.
超空泡减阻机理的研究表明:超空泡不仅可以减小回转体的摩擦阻力,还可以减小回转体的压差阻力。
The low profile oval shaped lenses with UV and Antifog protection reduce drag and provide excellent peripheral vision, the mirror finish helps reduce brightness and glare.
该低调型椭圆形镜片有效紫外线保护,并减少阻力,并提供良好的周边视力和清晰度,有助于减少亮度和眩光。
Poor breathing mechanics can increase drag and reduce the effectiveness of your stroke during the breath.
不好的呼吸技术能增加阻力、减弱呼吸时的划臂效力。
The unique aim of aerodynamic designer is always to enhance lift coefficient and reduce drag coefficient.
增升减阻一直是空气动力设计工作者追求的目标。
Drag the column border to the left to reduce its width or to the right to increase its width.
将该列边框向左拖动以缩小其宽度,或向右拖动以增加其宽度。
The influences of plasma parameters such as energy, ignition location and shape on drag performance are reviewed. At present, laser plasma technology can reduce the wave drag by 70%.
讨论了等离子体能量、点火位置和形状等参数对减阻性能的影响,目前利用激光等离子体技术可以减小70%的波阻。
Need to Wall Street pay transcripts baidu double-sided pressure on a regular basis, one side need to find new business growth point, on the other hand also need to reduce bad assets drag on earnings.
需要定期向华尔街交成绩单的百度双面承压,其一方面急需找到新的业务增长点,另一方面也需要减轻不良资产对财报的拖累。
In the engineering project, negative skin friction is the drag force that will reduce the vertical bearing capacity and cause differential settlement of the structure.
工程中由于负摩阻力产生的下拉荷载不仅使桩竖向承载力减小,还会导致结构物的不均匀沉降。
Two stretchable handle pushing rods can move conveniently, can reduce the space for arranging the machine, and changes the drag-typed structure in the prior into a push-typed structure simultaneously.
两个可拉伸的手柄推杆,既方便移动,又可以减小机器放置的空间,同时将现有技术中的拖拉式结构改变为推进式结构。
The adding of the drag reduction agent can reduce the friction force of the current and increase the flow speed as well as increase the conveying distance.
引入减阻剂后,可降低湍流磨擦阻力,提高流速。增大输送距离和提高管道输送能力。
The adding of the drag reduction agent can reduce the friction force of the current and increase the flow speed as well as increase the conveying distance.
引入减阻剂后,可降低湍流磨擦阻力,提高流速。增大输送距离和提高管道输送能力。
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