查询词典 wind tunnel

Aeolian grain transport on the soil-like surface composed of fine sand and silt is measured in a wind tunnel.

通过风洞实验研究了由细沙粒和粗粉粒组成的类土壤颗粒的风力输运过程。

The number of lift-off sand grains percent time percent sand bed area Based on the lift-off velocity distribution function of saltating sand grain, this thesis gains the number of lift-off sand grains percent time percent sand bed area which ranges from 6796 to 8846900 number/(s·m2) by combination motion model of single saltating sand grain and some motion parameters of saltating sand grains and the flux of wind sand current from wind tunnel experiment.

单位时间单位面积沙床起跳沙粒数利用本文获得的沙粒起跳初速度分布函数，结合沙粒跃移运动学模型以及风洞实验中获得的沙粒跃移运动参数以及输沙量，反演出一定风场条件下单位时间单位面积沙床起跳沙粒数，变化范围6796-8846900个/(s·m2)，并满足。

Double-skin facade ; wind tunnel test ; wind load ; peak factor ; probability distribution ; computational fluid dynamics

国家自然科学；双层幕墙；风洞试验；风荷载；峰值因子；概率分布；计算流体动力学

Through simulations on abated effect of nylon and plastic nets with different structure on wind-blown sand in wind tunnel, the aim of this paper is to provide a theoretic base for optimized design of blown sand engineering in the field and a new sand-defending material application.

通过不同结构的尼龙网和塑料网对风沙流减弱作用的风洞实验研究，旨在为探求各种防沙新材料的防护功能，并为防沙新材料的开发、野外工程防沙的优化设计及其应用提供理论依据。

The result of wind tunnel showed the rate of soil erosion increases with the increasing of wind velocity by the power function.

风洞试验的结果表明，风速越大，风蚀越强烈，二者之间表现为幂函数的变化关系，18m／s是风速由轻变重的一个转折点。

The flow field of a large storage yard with windbreak was investigated in the wind tunnel under three dominant wind directions.

以某钢铁集团即将建设的大型堆料场为背景，运用平面风速传感器和丝线流动显示方法对料场防风网的作用效果进行了评估，得到了料场在3个主导风向下的基本流动形态。

The semi-rigid wake model and the present calculation method were used to study two wind turbines in the wind tunnel, it was concluded that the results were closer to experiment data than that from the element/momentum theory, and aerodynamic performance of HAWT can be analyzed precisely, in particular, in the range of high tip speed ratio.

对两个风洞中实验的风力机模型进行了计算，结果表明，利用所给出的模型和计算方法比叶素/动量理论更加接近实验数据，并且在较大尖速比范围内可精确地分析水平轴风力机的空气动力特性。

Good agreement was obtained between the computed results and wind-tunnel test results of the single house, and the variation trend of wind pressures on the surface of low-rise building under interference of the other house is discussed.

在单体计算结果和风洞试验结果有较好吻合的前提下，获得了有相邻建筑干扰的情况下，低层四坡屋面房屋的表面风压的变化规律，结论可直接供工程设计参考。

The wind tunnel test results show that surface soil velocity and wind erosion modulus in the farmland under plow tillage are larger than that under no-tillage with standing crop stubble, while surface roughness under plow tillage is smaller than that under no-tillage with standing crop stubble.

风洞试验研究表明：翻耕土壤地表风速、土壤风蚀侵蚀率均比免耕土壤高，而地表粗糙度免耕明显高于翻耕。

The low speed institute of CARIA has developed the new technology through which the low speed wind tunnel force measurement test for civil airplanes are carried out. In order to reach the international standard, we have sequentially designated the special strain ganged balance, and improved the model support and the steady wind speed's controlled system. At last, we prove it validity by the test of CRJ which is the civil airplane's model.

民机低速风洞测力试验技术是中国航空工业空气动力研究院低速所新研制的一项试验技术，为了达到国际先进测量水平，该项技术先后成功研制了专用的应变天平，改进了模型支撑和稳风速控制系统，用CRJ民机模型进行了风洞试验验证。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。