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气动稳定性     
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  aerodynamic stability
     A 3D AERODYNAMIC STABILITY ACTIVE CONTROL MODEL FOR AXIAL FLOW COMPRESSOR
     轴流压气机三维气动稳定性及主动控制模型
短句来源
     Aerodynamic Stability Analysis of Space Structures
     空间结构的气动稳定性分析
短句来源
     Aerodynamic Stability Study of Axial Flow Ventilator
     轴流通风机气动稳定性研究
短句来源
     A quasi one-dimensional, stage-by-stage, nonlinear mathematical model for the axial fan and compression system aerodynamic stability has been constructed in the paper based on compressor stage characteristics.
     本文基于多级轴流压气机的逐级特性,建立了一种分析航空发动机压缩系统气动稳定性的一维非线性数学模型。
短句来源
     Computation and assessment of aerodynamic stability of turbofan engine for missile
     弹用涡扇发动机气动稳定性计算与评定
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  pneumatic stability
     The result shows that the requirements on improvement of lateral pneumatic stability of trains can be met by changing the geometric parameters of the carbody section.
     结果显示:通过改变车体断面的几何参数可以达到改善列车横向气动稳定性的要求。
短句来源
     The VXI bus measuring system for the test of the engine stability is such a test system developed for the distortion test of the entering air flow field of turbofan/ turbine aircraft engine and the test device for studying the pneumatic stability. The system has achieved the internal advanced level.
     发动机稳定性试验研究VXI总线测试系统是针对涡扇/涡喷发动机进气流场畸变试验以及气动稳定性试验研究装置而开发的测试系统,达到了国内先进水平。
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  “气动稳定性”译为未确定词的双语例句
     As we know, the aim of wind induced vibration analyses for a long span bridge is to study its aerodynamic and aerostatic stability and to find its buffeting responses so as to avoid wind instability and to ensure the buffeting amplitude within a permissive range for structural safety and amenity.
     大跨度桥梁抗风响应研究的目的主要是为了确保结构的气动稳定性和静风稳定性以及将结构抖振响应的振幅限制在允许范围内,以保证结构使用上的安全性和舒适性。
短句来源
     The stable operating range of the twin-spool aeroengine can be found from the variations of the parameters for the operating gasodynamic stabilities of the high and low pressure compressors with the L,cor .
     特别是能从表征高、低压压气机气动稳定性的参数随nCOY,L的变化规律中看出双转子发动机的稳定工作范围。
短句来源
     A quasi one-dimensional, time dependent system model based on the parallel compressor theory was used to compute the effect of inlet distortion on turbine engine stability;
     其中, 进气畸变对发动机气动稳定性影响的计算采用平行压气机模型, 基于李亚普诺夫理论的方法完成;
短句来源
     The traditional aerodynamic segment model stability discriminent is not suitable for spatial dome and cable membrane structures owing to their complex shape and various vibration modes.
     空间网壳及索膜结构由于外观形状复杂 ,结构的振动也不是以单一振型为主 ,因此传统的节段模型气动稳定性判别式不再适用 .
短句来源
     A computer program is developed to analyze the effects of circumferential inlet total-pressure distortion on the stability and performance parameters of turbojet/turbofan engines.
     开发了一种用于计算进气总压周向畸变对涡喷/涡扇发动机气动稳定性和主要性能参数影响的软件。
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  aerodynamic stability
The results show that central-slotting can not always improve the aerodynamic stability of bridge structure.
      
Study of the aerodynamic stability of a blunt cone with a side flap in a hypersonic flow
      
It was also found that the severe decrease in the aerodynamic stability was due to the nonlinear effects.
      
Therefore, the nonlinear factors should be considered accurately in aerodynamic stability analysis of long-span suspension bridges during erection.
      
Aerodynamic stability of cable-supported bridges using CFRP cables
      
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  flow stability
It is shown that the flow stability is lost in the region of the solution dilatancy; this loss is manifested in random oscillations of the system transparency.
      
Flow stability of a conducting liquid flowing down an inclined plane in the presence of a magnetic field
      
Flow stability of a Grad-model liquid layer on an inclined plane
      
Flow stability of viscous liquid layer with moment stresses on an inclined plane
      
The flow stability of a liquid layer on an inclined plane with account for molecular spin [1, 2] has been considered in [3] in the absence of moment stresses within the liquid.
      
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  aerodynamic stabilization
Aerodynamic stabilization of a flexible optical disk with an asymmetrically and triangularly arranged stabilizer
      
We experimentally demonstrated that the asymmetrical design effectively controls the aerodynamic stabilization at a pickup focal point.
      
  其他


The optimization design of aerodynamic configurations for earth orbit vehicles is treated.Choosing vehicle total heat transfer as a subjective function and considering the design reguirement of the longitudinal aerodynamic stability for the reentry vehicles,under the conditions of the given reentry weight and the fixed fineness ratio,we utilize the interir penalty function technique to determine the minimum aerodynamic heat transfer configuration which meets the specified reguirement of the longitudinal aerodynamic...

The optimization design of aerodynamic configurations for earth orbit vehicles is treated.Choosing vehicle total heat transfer as a subjective function and considering the design reguirement of the longitudinal aerodynamic stability for the reentry vehicles,under the conditions of the given reentry weight and the fixed fineness ratio,we utilize the interir penalty function technique to determine the minimum aerodynamic heat transfer configuration which meets the specified reguirement of the longitudinal aerodynamic stability.The results presented indicate that the double cone with a flat nose is an attractive aerodynamic shape for earth orbit reentry vehicles.The total reentry heat transfer and the weight of reentry thermal shielding can be reduced as lower as possible.The longitudinal aerodynamic stability could be raised effectively.

本文研究了地球轨道再入飞行器气动外形优化设计问题。文中选用飞行器再入总加热量为目标函数,考虑再入飞行器纵向气动稳定性能的设计要求,在给定再入重量和约定长细比的条件下,用内点罚函数方法求解满足规定纵向气动稳定性能要求的最小再入加热气动外形。计算结果表明,平头双锥体是一种很有吸引力的地球轨道再入飞行器气动外形,它既可以最大限度地降低再入总加热量和减轻再入防热层重量,又可以有效地提高纵向气动稳定性能。

The model design, installation and test procedure of the first wind tunnel model test on railway bridge in China are presented in this paper. Static section model test for the Hongshui River Cable-stayed P.C. Railway Bridge with a scale of 1:10 was conducted in the low speed wind tunnel of CARDC, and it was carried out for wind velocities of 20—40 m/sec and angles of attack from -10° to +10° with Reynolds' number of 9.7×10~5—1.56×10~6 related to width B. Test results confirmed the aerodynamic stability of the...

The model design, installation and test procedure of the first wind tunnel model test on railway bridge in China are presented in this paper. Static section model test for the Hongshui River Cable-stayed P.C. Railway Bridge with a scale of 1:10 was conducted in the low speed wind tunnel of CARDC, and it was carried out for wind velocities of 20—40 m/sec and angles of attack from -10° to +10° with Reynolds' number of 9.7×10~5—1.56×10~6 related to width B. Test results confirmed the aerodynamic stability of the Hongshui River Bridge, and showed the effects of the shape of girder cross section, the deck structure, the cantilever brackets of sidewalk, the railway and the wagons on the aerodynamic charaeteristics corresponding to different conditions of the construction, completion and service stages of the bridge.

本文概述了我国铁路桥梁第一次模型风洞试验的主要内容和经验。斜拉桥跨度大、重量轻、阻尼小,其风振问题日盆受到重视。铁路斜拉桥活载比重大、梁高桥窄,其抗风特性又不同于一般公路桥。文内详细介绍了红水河铁路斜拉桥风洞静力试验的模型设计、试验方法及其装置,根据试验结果曲线探讨了该桥在施工、建成和通车各阶段,截面的升力、阻力和力矩随攻角变化的特性;对结构因素的影响提出了若干见解。本文为分析铁路桥梁的气动稳定性和改善其抗风性能提供了实验依据。

Experiments on a square-sertion cylinder fixed and forced to oscillate transversely in uniform stream were conducted in a water tank. The Reynolds number of the experiments is in the range 3·103 to 104, the amplitude to side length ratio A/D is up to 0.7 and the range of reduced velocity 4.5≤Vt≤12.This study aims at investigating the lock-in phenomenon, fluctuating lift and the phase shift between fluctuating lift and displacement of the oscillating cylinder. The problems on the aeroelastic instability relating...

Experiments on a square-sertion cylinder fixed and forced to oscillate transversely in uniform stream were conducted in a water tank. The Reynolds number of the experiments is in the range 3·103 to 104, the amplitude to side length ratio A/D is up to 0.7 and the range of reduced velocity 4.5≤Vt≤12.This study aims at investigating the lock-in phenomenon, fluctuating lift and the phase shift between fluctuating lift and displacement of the oscillating cylinder. The problems on the aeroelastic instability relating to present experimental results have been discussed. The flow visualization clearly shows that there are drastic changes of vortex-shedding from cylinder passing through the resonance point and the upper end of the lock-in range. The results of the flow visualization can help us understand the physical mechanism of the phase shift.

本文对均匀流中静止方柱和横向强迫振动的方柱进行了实验研究。实验雷诺数范围为 3×10~3~10~4,振幅与柱截面宽度之比 A/D 达到0.7,实验折合速度范围为 4.5≤V_r≤12。文章重点研究了较高振幅振动柱的锁定现象、波动升力与柱位移之间的相位变化,讨论了方柱涡激振荡、驰振和气动稳定性问题。对流场进行的流动显示,清晰地显示出锁定区涡脱落过程、近尾迹流场随振动频率和振幅的演化规律,从而对振动柱波动升力与相位变化的物理机制获得进一步认识。

 
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