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水洞     
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  water tunnel
     This paper presents the test result of orbiter in CARDC FL-23,FL-24,FL- 31 and water tunnel. The preliminary analysis of test results also are given.
     介绍在CARDCFL—23,FL-24,FL—31以及水洞中典型的航天飞机轨道器模型流态观察的试验结果,并对结果作了初步分析。
短句来源
     Water tunnel experiment and model trajectory experiment of the model are made.
     在水弹道研究的基础上,对导弹与运载器水面分离弹道也进行了数值计算研究,并进行了水洞模型实验和水弹道模型实验.
短句来源
     The wake geometry of coaxial rotor and single rotor in hover and in level flight was investigated in the course of water tunnel experiment , and the wake boundary of a coaxial rotor for different advance ratios were investigated as an emphasis .
     通过对单旋翼和共轴式双旋翼在水洞中的对比实验 ,研究了在悬停和以不同速度前飞时 ,共轴式双旋翼和单旋翼尾迹形态的共性与区别 ,着重研究了在不同前进比时共轴式双旋翼尾迹边界的形态。
短句来源
     Study of Surveying Dynamic Deformation of Rotating Propeller in Water Tunnel
     水洞中旋转螺旋桨动态变形测量研究(英文)
短句来源
     Water Tunnel Experiment of the Flowfield in the Warship Flight Deck
     某舰飞行甲板区域流场特性的水洞试验
短句来源
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  water cave
     FUNDAMENTAL CHARACTERISTICS AND DEVELOPMENT CONDITIONS OF BENXI WATER CAVE
     本溪水洞的基本特征和形成条件
短句来源
     Benxi water cave is the biggest subterranean cave developed in mid high latitude area of northeast China, with over 5000m in length, and the explored parts are 3685m long.
     本溪水洞为我国东北中高纬度地区规模最大的地下河洞穴,全长在5000m以上,已探测长度3658m。
短句来源
     The development of Benxi water cave started from the middle Pleistocene, about 400000 years ago.
     本溪水洞的发育起始于中更新世,即约40万年前。
短句来源
     Experimentally, the flow-field roud the S-shaped airfoil is tested by means of a water cave.
     在试验方面,利用水洞对S形翼型的绕流流场进行了实测。
短句来源
     Evaluation Procedure and Indexs System of EIA for Developing and Constructing Mountain Scenery Areas ——A Case Study of Water Cave National Scenery Areas in Benxi
     风景名胜区开发建设项目环境影响评价程序和指标体系——以本溪水洞国家级重点风景名胜区为例
短句来源
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  water tunnels
     This paper mostly discusses and studies collectivity design of cavitation tunnel and some relative problem, including collectivity design of cavitation tunnel, method of producing cavity, dissolved gas controlled technique, water tunnel head loss, selection of driving pump and driving electromotor, water tunnels pipeline structure calculation and base frequency.
     本论文主要是讨论和研究空化水洞总体设计问题,以及设计过程中相关的一些问题,这其中包括空化水洞总体设计、产生空化的方法、空化水洞中溶解气体的控制技术、水洞水头损失、驱动水泵和驱动电机的选择、水洞管道部件结构计算、水洞固有频率计算等几个方面。
短句来源
  a water tunnel
     Experiment and data collection of flow status around S-shaped blade were performed on a water tunnel experiment rig.
     在水洞实验台上进行了S型叶片绕流的实验观察与实验数据采集。
短句来源
     A WATER TUNNEL OF GRAVITATIONAL TYPE WITH LOW NOISE AND SMALL CAVITATION NUMBER AND ITS APPLICATIONS
     低噪声低空化数的重力式水洞及其应用
短句来源
     Experimental results suggest that, in a water tunnel of 1 % turbulence level, heating the forepart of the flat plate delays the laminary-turbulence boundary lay-er transition, and the laminar riegion expands downstream.
     实验发现在流场湍流度1%的水洞中,模型前部壁面加热有效地延迟了水边界层的转捩,延长了层流区长度;
短句来源
     An experiment on the visualization of vortex field produced by a 2-D airfoil with pitching motion and composite motion of heaving and pitching was conducted in a water tunnel.
     介绍了在水洞中进行的二维机翼纯俯仰运动和沉浮/俯仰联合运动时的流动显示实验。
短句来源
     The comparison was made between the computed flow field and the flow pattern performed by LIF in a water tunnel.
     计算的流场与水洞进行的激光诱导荧光显示技术的流场显示结果进行了对比;
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      water tunnel
    The process of the generation and interaction of solitons in a circular wind-water tunnel is considered.
          
    Plate drag reduction with low surface energy coating in water tunnel
          
    The experimental part of this study was performed in a cylindrical water tunnel, permitting an independent rotation of two coaxial jets.
          
    The flow structures were shown in a water tunnel using the hydrogen-bubble flow visualization technique.
          
    Direct measurements in a water tunnel showed that calculated values of critical velocity were slightly too high, but otherwise confirmed the role of the lunules.
          
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      water cave
    It is active epiphreatic water cave in lower parts, upper parts were formed by vadose seepage water.
          
      hydrodynamic tunnel
    Results of testing a series of truncated bodies of revolution with convergent afterbodies in a hydrodynamic tunnel are presented.
          
    A technique for studying the effectiveness of bow thrusters of the "propeller in a tunnel" type is proposed, validated, and checked by testing models in a hydrodynamic tunnel.
          
      water tunnels
    Method of approximate account for the wall effect in cavitation flow around bodies in water tunnels
          
    One of the basic questions in the study of advanced cavitation in water tunnels of the closed-circuit type is the establishment of the correspondence between the flow patterns observed in the channel and in an unbounded stream.
          
    Modeling of developed cavitation flows in water tunnels
          
    Experiments in water tunnels indicate that the boundary layer adjacent to the M.
          
    Four variants of the second method, which estimates the transit time of vortices tagged by heat or dye, were used in wind and water tunnels over a relatively large Reynolds number range.
          
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      其他


    The spectacular assemblage of stone artifacts described here was found in Zhang-wu county, Shaanxi Province. This assemblage includes nuclei, flakes, points, and a large number of scrapers. Stratigraphically , they were unearthed from the sand-gravel deposits under loess. Considering its stratigraphical position, this site should be dated early Late Pleistocene, and culturally of the Middle Paleolithic period.

    根据地层层位,长武窑头沟遗址的地质时代应为晚更新世的初期;与同时代的丁村遗址相比较,两者在地理分布上和文化内涵上均不相同;因此,在旧石器时代中期华北可能有两种或更多的文化类型;本文所述的泾渭文化与水洞沟文化可能有更密切的渊源关系。

    In the summer of 1981, Xishuidung palaeolithic site was discovered by author.It is the Xishuidung cave, situated in Wangchuan, Lantian County. A number of mammalian fossils, stone artefacts, bone and antler tools, charcoal and ash layers were found in the cave sedimetnt. By initial study, we think Xishuidung is a palaeolithic site, lived by ancient human, and the ancient human who lived there could use fire. Basing on the charcters of these cultual remains and mammalian fossils, this site is judged to belong...

    In the summer of 1981, Xishuidung palaeolithic site was discovered by author.It is the Xishuidung cave, situated in Wangchuan, Lantian County. A number of mammalian fossils, stone artefacts, bone and antler tools, charcoal and ash layers were found in the cave sedimetnt. By initial study, we think Xishuidung is a palaeolithic site, lived by ancient human, and the ancient human who lived there could use fire. Basing on the charcters of these cultual remains and mammalian fossils, this site is judged to belong to the earuly stage of the middle- pleistocene, that is, the early-palaeolithic period. There may be some connection with the homo erectus lantianensis.

    辋川锡水洞旧石器时代文化遗址,位于陕西省蓝田县南侧的秦岭山区。经过初步试掘,从锡水洞内的堆积层中发现了许多石器、骨器、木炭屑和灰烬层,以及哺乳动物化石。通过分析研究认为,锡水洞是古人类曾经居住生息过的地方,而且这些古人类具有使用火的能力。根据哺乳动物化石的种类和时代,可以确定锡水洞遗址属中更新世早期,即旧石器时代的早期,似乎与蓝田猿人有一定联系。这一发现,对蓝田人的文化、住所、用火等问题的研究,提供了新的重要材料。

    In order to carry out basic research on hydrofoil profiles it is appropriate to have an auxiliary two-dimensional test section which can be fitted into the circular test section of a cavitation tunnel if necessary. This additive test section is constructed in such a way that a homogeneous flow is assured and the model size can be selected as large as possible with negligible wall effect and besides, it should be easily installed and disassembled. A brief description concerning the design and installation is...

    In order to carry out basic research on hydrofoil profiles it is appropriate to have an auxiliary two-dimensional test section which can be fitted into the circular test section of a cavitation tunnel if necessary. This additive test section is constructed in such a way that a homogeneous flow is assured and the model size can be selected as large as possible with negligible wall effect and besides, it should be easily installed and disassembled. A brief description concerning the design and installation is given in this technical note. Calibration has shown that the above-mentioned requirements are met satisfactorily.

    为了进行翼型的基本研究,给圆截面的空泡水洞配置一个二元试验段是适宜的。这种加装的二元试验段应保证流场均匀,并在洞壁效应可忽略的前提下安装尽可能大的试验模型,同时还应拆装方便。本文对二元试验段的设计和装置作了简要描述,校测结果表明上述要求能得到满足。

     
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