涡动粘滞系数模型,eddy viscosity model,在线英语词典,英文翻译,专业英语

1) eddy viscosity model

涡动粘滞系数模型

The current eddy viscosity model is applied to close Navier Stokes equations.

作者从Navier Stokes方程出发 ,用涡动粘滞系数模型来封闭波流相互作用下的流动方程 ,提出了一个求解整个水深内的断面流速分布的方法。

2) whirling

涡动

Research on whirling mechanism of bottom drillstring and its rules by inner simulated experiments;

下部钻柱涡动机理及规律的实验研究

It is also pointed out that a drillstring may come into reverse motion only after its positive whirling.

本文对钻柱在井中的运动规律进行了较详细地分析,不仅再次说明了钻柱在本身自转的同时还进行着公转,而且指出了钻柱先是在做正向涡动,然后才可能发展到反向进动。

Nonlinear dynamics of a cracked rotor with whirling were analyzed and were compared to a rotor without whirling.

分析了裂纹轴转子系统在考虑涡动时的非线性动力学行为 ,并与忽略涡动时的裂纹轴进行了对比 ,发现二者在周期分岔特性、振幅特性、轴心轨迹和庞卡莱图等方面均存在明显差异·　从而可以看出在考虑非线性涡动时 ,裂纹轴会出现复杂的动力学行为·　所得结论对于早期发现和诊断裂纹故障有一定参考价值

3) whirl

涡动

The drilling techniques of anti-deviation and fast penetration with pre-bending dynamics can make the well hole vertical by using the whirl features of the BHA of anti-deviation and fast penetration with pre-bending dynamics to create an anti-deviation force that is much more than the pendulum dropping force.

预弯曲动力学防斜打快钻井技术主要利用预弯曲动力学防斜打快钻具组合在井眼中的涡动特征,在钻头上形成一个远大于钟摆降斜力的防斜力,从而使井眼保持垂直。

This paper studied the annulus whirling motion of rotary drill string.

把旋转钻柱简化为一内外有流体的柔性转子系统 ,分析了在内外钻井液流体作用下的钻柱涡动行为。

In order to study half-speed whirl that is subjected to nonlinear oil force of rotor-bearing system, the Wu Elimination method and symbolic calculation method are combined in this paper.

为研究转子轴承系统中非线性油膜力引起的半速涡动 ,本文给出了将吴文俊消去法和符号计算相结合的分析方法。

4) whirling formation

涡动方程

This article presents the whirling formation when the PDC bit is at the bottom of the well and the methods to decreasing the PDC whirling was brought forward.

通过对钻头的受力分析,应用等效质量的方法和粒子运动原理,建立了PDC钻头在井底的涡动方程,并提出了减小钻头涡动的方法。

5) backward whirling

反向涡动

Bottom drillstring is often in backward whirling during drilling operations,which cause drill tools and bits to be damaged.

钻井过程中,下部钻柱通常处于反向涡动状态,易造成钻具和钻头的损坏。

6) whirl features

涡动特征

参考词条

涡动力涡动角涡动模式三维涡动涡动沙纹涡动比涡动误差涡动轨迹颤振涡动半频涡动杏花蕾

补充资料：粘滞系数

粘滞系数

　　又称"内摩擦系数"。流体粘滞性大小的量度。参见"松滞性"。
　　

说明：补充资料仅用于学习参考，请勿用于其它任何用途。

首页 \| 翻译 \| 影视 \| 论坛 \| 索引涡动机理钻头涡动油膜涡动角向涡动转子涡动涡动力学

1) eddy viscosity model 涡动粘滞系数模型 1. The current eddy viscosity model is applied to close Navier Stokes equations. 作者从Navier Stokes方程出发 ,用涡动粘滞系数模型来封闭波流相互作用下的流动方程 ,提出了一个求解整个水深内的断面流速分布的方法。 2) whirling 涡动 1. Research on whirling mechanism of bottom drillstring and its rules by inner simulated experiments; 下部钻柱涡动机理及规律的实验研究 2. It is also pointed out that a drillstring may come into reverse motion only after its positive whirling. 本文对钻柱在井中的运动规律进行了较详细地分析,不仅再次说明了钻柱在本身自转的同时还进行着公转,而且指出了钻柱先是在做正向涡动,然后才可能发展到反向进动。 3. Nonlinear dynamics of a cracked rotor with whirling were analyzed and were compared to a rotor without whirling. 分析了裂纹轴转子系统在考虑涡动时的非线性动力学行为 ,并与忽略涡动时的裂纹轴进行了对比 ,发现二者在周期分岔特性、振幅特性、轴心轨迹和庞卡莱图等方面均存在明显差异·　从而可以看出在考虑非线性涡动时 ,裂纹轴会出现复杂的动力学行为·　所得结论对于早期发现和诊断裂纹故障有一定参考价值 3) whirl 涡动 1. The drilling techniques of anti-deviation and fast penetration with pre-bending dynamics can make the well hole vertical by using the whirl features of the BHA of anti-deviation and fast penetration with pre-bending dynamics to create an anti-deviation force that is much more than the pendulum dropping force. 预弯曲动力学防斜打快钻井技术主要利用预弯曲动力学防斜打快钻具组合在井眼中的涡动特征,在钻头上形成一个远大于钟摆降斜力的防斜力,从而使井眼保持垂直。 2. This paper studied the annulus whirling motion of rotary drill string. 把旋转钻柱简化为一内外有流体的柔性转子系统 ,分析了在内外钻井液流体作用下的钻柱涡动行为。 3. In order to study half-speed whirl that is subjected to nonlinear oil force of rotor-bearing system, the Wu Elimination method and symbolic calculation method are combined in this paper. 为研究转子轴承系统中非线性油膜力引起的半速涡动 ,本文给出了将吴文俊消去法和符号计算相结合的分析方法。 4) whirling formation 涡动方程 1. This article presents the whirling formation when the PDC bit is at the bottom of the well and the methods to decreasing the PDC whirling was brought forward. 通过对钻头的受力分析,应用等效质量的方法和粒子运动原理,建立了PDC钻头在井底的涡动方程,并提出了减小钻头涡动的方法。 5) backward whirling 反向涡动 1. Bottom drillstring is often in backward whirling during drilling operations,which cause drill tools and bits to be damaged. 钻井过程中,下部钻柱通常处于反向涡动状态,易造成钻具和钻头的损坏。 6) whirl features 涡动特征参考词条涡动力涡动角涡动模式三维涡动涡动沙纹涡动比涡动误差涡动轨迹颤振涡动半频涡动杏花蕾补充资料：粘滞系数粘滞系数　　又称"内摩擦系数"。流体粘滞性大小的量度。参见"松滞性"。　　说明：补充资料仅用于学习参考，请勿用于其它任何用途。
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