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negative thrust
相关语句
  负推力
     This article analysis the major reasons that lead an axial negative thrust in unit 3, introduce the method of remove axial negative thrust with block the balance hole.
     通过计算,分析了3号汽轮机轴向负推力产生的主要原因,介绍了堵平衡孔消除轴向负推力的方法。
短句来源
     The Analysis and Disposition Method for the Axial Negative Thrust of Unit 3 in Maoming Thermal Power Plant
     茂名热电厂3号机转子轴向负推力问题的分析及处理
短句来源
     The Application of Reducing Axis Negative Thrust with JammingBalance Hole Method
     堵平衡孔法减少轴向负推力的应用
短句来源
     On Phenomenon of Negative Thrust in Turbine Rotor
     对汽轮机转子呈负推力的辨析
短句来源
     Practices demonstrate that blocking balance hole is a effective method to resolve the axial negative thrust of rotor.
     实践证明,堵平衡孔是解决转子轴向负推力问题的一种行之有效的方法。
短句来源
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  “negative thrust”译为未确定词的双语例句
     In the region of one fifth near the blade tip,flow separation and reverse flow occur at the blade surface,circulation appears even in the serious case,in consequence negative thrust emerges,which cuts down the efficiency of the propeller obviously.
     而在桨叶尖部五分之一区域出现叶面气流分离和倒流现象 ,严重时甚至出现反向环流 ,从而产生负拉力使螺桨效率明显下降。
短句来源
  相似匹配句对
     On Phenomenon of Negative Thrust in Turbine Rotor
     对汽轮机转子呈负推力的辨析
短句来源
     Nerves were negative.
     牙髓神经阴性。
短句来源
     The oppositive to the negative.
     而消极的角色示范则相反。
短句来源
     The Application of Reducing Axis Negative Thrust with JammingBalance Hole Method
     堵平衡孔法减少轴向负推力的应用
短句来源
     ON THRUST TECTONICS
     论冲断构造
短句来源
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  negative thrust
Cases of negative thrust caused by the Coanda effect are noted.
      
Dennett's defense of this possibility has both a positive and a negative thrust.
      
We recognize the negative thrust near the root for the given advance ratio in Table 1 and this happens at the off-peak efficiency operation.
      
When this was done for the first thruster start, a small negative thrust indication was observed even before propellant began to flow.
      
Pitch amplitudes lower than this yield positive thrust, and pitch amplitudes higher than this yield negative thrust or drag.
      
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When the fast valve control technique is applied to the type N-200 steam turbine,two kinds of nondesigned performances will be met,i,e.after the rapid shutting of the I.P.intercepter valves,a big negative thrust will act on the rotor,and a large pressure difference will appear across the valves,which will affect the fast re-opening of the valves.The result of 13 tests for fast valve control on the No1 Set in Cao-Yang power plant have proved that the surging pads of the thrust bearing can withstand...

When the fast valve control technique is applied to the type N-200 steam turbine,two kinds of nondesigned performances will be met,i,e.after the rapid shutting of the I.P.intercepter valves,a big negative thrust will act on the rotor,and a large pressure difference will appear across the valves,which will affect the fast re-opening of the valves.The result of 13 tests for fast valve control on the No1 Set in Cao-Yang power plant have proved that the surging pads of the thrust bearing can withstand the extra negative thrust and the lifting capability of the I.P.servo motor can satisfy the reguirment for fast valve control.The conclusion derived from these tests is that the type N-200 steam turbine is adaptable to the fast valve control technique.

N-200型汽轮机在应用快控汽门技术时,会遇到两种非设计工况,即当中压调节汽门快关后整个转子上会产生巨大的负推力,并在中压调节汽门前后造成很大的汽压差,影响阀门的迅速再开启。通过朝阳发电厂1号机组的13次快控汽门试验,认为该机组的定位推力瓦块可承载额外的负推力;中压油动机的提升力也能满足快控汽门的要求。试验的结论是 N-200型汽轮机是能够适应快控汽门技术的。

Surface flow visualization has been carried out with tufts adhered to the surfaces of the rotating propeller blades.From the experimental results it is found that in part of four fifths of blade surface from hub to tip,the air flow runs from leading edge to trailing edge in the outward direction with some inclination to chord.In the region of one fifth near the blade tip,flow separation and reverse flow occur at the blade surface,circulation...

Surface flow visualization has been carried out with tufts adhered to the surfaces of the rotating propeller blades.From the experimental results it is found that in part of four fifths of blade surface from hub to tip,the air flow runs from leading edge to trailing edge in the outward direction with some inclination to chord.In the region of one fifth near the blade tip,flow separation and reverse flow occur at the blade surface,circulation appears even in the serious case,in consequence negative thrust emerges,which cuts down the efficiency of the propeller obviously.

本文介绍了旋转螺桨叶面流场显形实验。粘贴丝线在旋转桨叶表面作流场显形。从实验结果看 ,在桨叶由根到尖的五分之四部分 ,气流由前缘向后缘与弦线方向倾斜某个角度向外流动。而在桨叶尖部五分之一区域出现叶面气流分离和倒流现象 ,严重时甚至出现反向环流 ,从而产生负拉力使螺桨效率明显下降。

his article describes significance and way of negative-thrust test, andimplement and data processing procedures measuring negative-thrust of an engine by apick-up camera and a high-speed camera during air-start test flight of WJ-6 enginefor Y 8 aircraft. The article also analyzes change status of exhaust temperature, rotatingspeed, blade angle and other parameters during air-start test flight. The negativethrust characteristic of the aircraft and the control safety allowance can be judged...

his article describes significance and way of negative-thrust test, andimplement and data processing procedures measuring negative-thrust of an engine by apick-up camera and a high-speed camera during air-start test flight of WJ-6 enginefor Y 8 aircraft. The article also analyzes change status of exhaust temperature, rotatingspeed, blade angle and other parameters during air-start test flight. The negativethrust characteristic of the aircraft and the control safety allowance can be judged bymeans of research so that check or correct the theoretical calculation. The flight test personnel of same speciality may use the article for reference.

概述了负拉力测试的意义和途径,介绍了在Y8飞机进行WJ—6发动机空中起动试飞中,用一台摄像机和一台高速摄影机测定发动机负拉力的实施过程及数据处理过程。并进一步探讨分析了Y8飞机发动机空中起动试飞中排气温度、转速和桨叶角等参数的变化情况。通过研究,可以判断飞机负拉力特性及操纵安全裕度,从而验证理论计算或修正理论计算。可供从事本专业的飞行试验人员参考。

 
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