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- variable density wind tunnel 变密度风洞
- Preliminary research of infrared thermographic technique in hypersonic low density wind tunnel 高超声速低密度风洞红外热图技术初步研究
- low density wind tunnel 低密度风洞
- The planes survived the wind tunnel test intact. 这些纸飞机在测试风道中丝毫未损。
- An ABB variable speed drive system is to power the giant fan that generates subsonic wind speeds at Boeing's flagship wind tunnel in Philadelphia. ABB的一个变速驱动系统正在为波音公司在费城的旗舰风洞的大型风扇提供动力，以制造出次音速风速。
- It is not correct to think of the wind tunnel having uniform flow. 设想风洞具有均匀的气流是不正确的。
- They covered it in rigid keratin bristles 4-6cm long and 0.5mm in diameter at a density of around three fibres per square centimetre, then put it in a virtual wind tunnel. 在它的上面以每平方厘米大约三根纤维的密度，覆盖了长度 4-6 厘米、直径 0.;5 毫米的刚性角质猪鬃，然后将其放入一个虚拟的风洞中。
- The paper is based upon Aero-Optics theory, pursuing the methods and realization for measuring the density distribution of transient flow field in wind tunnel test. 本论文基于气动光学理论，研究在流场试验中检测高速瞬态流场密度分布的方法与实现。
- The inviscid linear stability of variable density swirling jets is analyzed by normal mode method. 用正则模方法研究了变密度无粘旋拧射流线性稳定性特征。
- By means of the multidisciplinary analysis of acoustic variable density logging data and dynamic/static data of oil fie. 声波-变密度测井主要应用于检查新井固井质量,为新井投产提供资料。
- Setting very low speeds in a wind tunnel is always a vexatious problem. 在风洞中调出低风速来始终是一个麻烦问题。
- The status for acoustic variable density log in Daqing Oilfield is introduced including applied techniques and logging tool levels. 介绍了大庆油田声波变密度测井的现状、应用的技术和仪器的水平。
- M2B tools acoustic amplitude and variable density signals become distortional in large boreholes, slow formation such as coal beds, and so on. 但该仪器在大井眼、煤层等慢速地层、低密度固井井段,声幅及变密度曲线有失真现象。
- It has multiple interfaces matching with CSU,and it can realize electrode array measurement,perforation coring,acoustic variable density logging,and so on. 该系统采用微型计算机和高速处理技术 ,应用计算机自动控制理论 ,设计了多道与CSU仪器配接的端口 ,能实现电极系测量、射孔取芯、声波变密度、连斜测量等多项功能。
- It should be noted that a balance is not always required in a wind tunnel. 应该指出，天平对风洞来说并非是绝对必须的。
- By variable density method, an optimal topology model is established with the help of the software ANSYS to support the optimal topology design of the horsehead pumping unit. 文章应用有限元分析软件ANSYS,采用变密度法建立拓扑优化模型,对抽油机驴头进行拓扑优化设计。
- This work refers to as the thermally compressible flow, the variable density flow due to temperature variation, with dimentionless heating number to describe its compressibility. 本文把由温度引起密度变化的运动流体称为热可压流，并由无因次加热数来度量其压缩程度。
- The aerodynamics characteristics of this airfoil is studied in wind tunnel. 进行了翼型的低速气动力性能研究，为附面层特性研究提供了方向。 结果表明，该翼型具有较好的升阻和俯仰特性，但失速特性差。
- In the twodimensional wind tunnel, systematic experimental researches were carried out on the phenomenon of reverse transition on a heated plane with stable density stratification. 针对加热平板表面密度分层结构中的逆转捩现象,在二元风洞中进行了系统的实验研究。
- The wind tunnel is produced under a technical cooperation agreement with Ford Co of US. 风洞机是根据与美国福特公司的技术合作协议生产的。
