威莫斯公式Weimers formula特点characteristics：（）

A、比实际输气量小10%左右It is about 10% smaller than the actual volume；

B、适用于阻力平方区Apply to the resistance square；

C、适用于管径较小，输气量不很大，净化较差的矿场集输或干线输气It is suitable for gathering and transporting gas in the mine with small pipe diameter, small gas transmission capacity and poor purification.

D、适用于水力光滑区Suitable for hydraulic smooth zone

提问人：网友happy2008 发布时间：2022-01-07

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第1题

管道接口垫环修正系数Correction factor of pipe interface gasket ring（）

A、无垫环No backing ring  = 1

B、垫环间距Backing ring spacing12mm  = 0.975

C、垫环间距Backing ring spacing6mm  = 0.95

D、以上都不对

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第2题

潘汉德尔公式Panhandle formula特点characteristic：（）

A、摩阻系数只是雷诺数的函数The friction coefficient is simply a function of the Reynolds number

B、A式适用于雷诺数不很大的光滑区Formula A is applicable to smooth regions with small Reynolds number

C、B式适用于雷诺数大的阻力平方区。Formula B is applicable to the resistance square area with large Reynolds number

D、以上都不对

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第3题

摩阻系数只是雷诺数的函数或是管壁粗糙度的函数。Friction coefficient is simply a function of Reynolds number or wall roughness.

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第4题

输气管的雷诺数一般高达106~107，是输油管的10~100倍。The Reynolds number of the pipeline is generally as high as 106~107, which is 10~100 times that of the pipeline.

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第5题

一般干线输气管都在阻力平方区The main pipelines are generally in the resistance square area，不满负荷时在混合摩擦区Under load in the mixed friction zone，城市及居民区的配气管在水力光滑区。The air pipes of urban and residential areas are in the hydraulic smooth area.

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第6题

当输气管的Re>Re2时，为阻力平方区When Re>Re2 of the gas pipe, is the resistance square area；当输气管的Re1<re<re2时，为混合摩擦区when of the gas pipe, it is mixed friction zone； hydraulic smooth>

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输气管的管壁粗糙度一般比输油管小。The roughness of the pipe wall is generally smaller than that of the pipeline.

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第8题

对于新管，美国一般取当量粗糙度Ke=0.02mm，前苏联平均取0.03mm，我国通常取0.05mm。For the new pipe, the equivalent roughness Ke=0.02mm in the United States, 0.03mm in the former Soviet union, and 0.05mm in China.

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第9题

美国气体协会测定了输气管在各种状况下的绝对粗糙度。The gas society measured the absolute roughness of the pipe under various conditions.

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第10题

管道当量粗糙度考虑了管道形状损失的影响，一般比绝对粗糙度大2~11%。The equivalent roughness of pipeline takes into account the influence of pipeline shape loss, which is generally 2~11% higher than the absolute roughness.

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