• With a more aerodynamic shape and framed by a curved tail plane, these engines would make for a more streamlined aircraft, as well as directing most of their noise upward.

    通过更加符合空气动力学的形状一个曲线尾巴飞机结构这些发动机使飞行有效率同时会将绝大部分的噪音传向空气上方。

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  • The vibration force acting on the fluid directly comes into being the aerodynamic noise.

    气动噪声直接作用流体动力产生

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  • Assuming that noise is unknown but bounded, set membership identification problem for flight vehicle aerodynamic parameters is studied in this paper.

    噪声未知的情况下,本文研究了飞行器气动参数辨识问题

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  • Moreover, addition movement of the airframe can result from aerodynamic or propulsion noise.

    此外气动力发动机扰动也会造成附加运动

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  • Moreover, addition movement of the airframe can result from aerodynamic or propulsion noise .

    此外气动力发动机扰动也会造成附加运动

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  • Noise is included aerodynamic noise and structure noise.

    噪声主要包括气动噪声结构噪声。

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  • The noise at lower part of railway cars consists of rolling noise, aerodynamic noise and driving device noise.

    铁道车辆下部噪声主要滚动噪声、空气动力噪声机器噪声组成。

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  • The key point of reducing noise of paper machine is to reduce aerodynamic noise of vacuum couch.

    降低真空伏辊空气动力性噪声降低抄纸噪声关键

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  • Using acoustical holography, some interesting results are shown about the different noises of a high speed vehicle, such as engine noise, tire noise and aerodynamic noise.

    它能够用来分析汽车高速运动过程中发动机噪声轮胎噪声空气动力学噪声。

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  • According to the aerodynamic noise analysis of cross flow fans, investigates the mechanism of reducing noise due to the adoption of non-isometric impellers.

    根据风机气动噪声分析研究了采用等距叶轮降噪机理

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  • 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。

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  • In this paper, some schemes of reducing the aerodynamic noise are proposed for multi-blade centrifugal fans.

    针对多翼离心风机气动噪声主要噪声源提出降噪方案

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  • A wind tunnel test for a model of the automobile body shows that beneficial effects on reducing drag and suppressing aerodynamic noise by using internal acoustic excitation.

    汽车车身模型风洞实验表明内部激励可获得有效效果而且还能起到抑制气动噪声的效果。

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  • In addition, the pressure and velocity in cooling fan flow field are analyzed and the relations between flow rate, rotation speed, blade number and aerodynamic noise of cooling fan are studied.

    同时,对风扇压力速度进行分析;研究了风扇流量、风扇转速、扇气动噪声相互之间关系

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  • Proposes a theoretical model for aerodynamic noise transmitting towards interior cab of an automobile on the basis of the wind experiment.

    风洞实验基础上提出了气流噪声汽车内部传播理论模型

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  • The effect of protecting mesh of air conditioner outdoor unit on aerodynamic noise is studied with experimental method.

    采用试验研究方法,研究了某型空调器室外机组防护网气动噪声影响

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  • Chaos characteristics of the aerodynamic noise are discussed and the aeroacoustic noise signals on helicopter scissors tail rotor is analyzed by the chaos theory.

    研究剪刀尾桨气动噪声混沌特性,并应用混沌理论进行直升机尾桨气动噪声信号分析

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  • Described are the sound source detection method for the aerodynamic noise on Shinkansen rolling stock and relevant noise reduction measures.

    介绍新干线车辆空气动力噪声声源探测方法相应降噪措施。

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  • The aerodynamic noise strength of the centrifugal blower is bigger, and it is the main block in the centrifugal blower noise, and don't easy to control.

    通风机空气动力噪声强度通风机噪声主要部分,不易控制。

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  • With the constant increase of the trains' speed, the aerodynamic noise gradually succeeds the traditional track noise and becomes the main noise source of the high-speed trains.

    列车行驶速度逐年提高气动噪声源逐渐超越轮轨噪声成为高速列车主要噪声源。

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  • The reason of influencing aerodynamic noise of air-conditioning outdoor unit was analyzed in detail, and solve the problem of reducing the noise of air-conditioning.

    文章低气压条件下气闸舱内换热过程特点进行了理论分析,认为必须采取有效措施以解决气闸舱空气调节问题

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  • The reason of influencing aerodynamic noise of air-conditioning outdoor unit was analyzed in detail, and solve the problem of reducing the noise of air-conditioning.

    文章低气压条件下气闸舱内换热过程特点进行了理论分析,认为必须采取有效措施以解决气闸舱空气调节问题

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