题目内容
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[主观题]
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.
提问人：网友migidong
发布时间：2022-01-07
题目内容
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更多“输气管的管壁粗糙度一般比输油管小。The roughness…”相关的问题
第4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.
第5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.
第6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.
第7题
输气管加上内壁涂层，既可减少内腐蚀也大大降低了粗糙度，在同样条件下使输气管输气量增加5~8%，有的甚至高达10%。The inner wall coating on the pipe can reduce the internal corrosion and roughness. Under the same condition, the gas volume of the pipe can be increased by 5~8%, some even as high as 10%.
第8题
根据流动管道内所处的流动状态具有不同的摩擦阻力系数。There are different friction resistance coefficients according to the flow state in the flow pipe.
第9题
内壁涂层的费用一般只占钢管费用的2~3%，只要输气量提高1%，就能很快地回收成本。The cost of inner wall coating generally only accounts for 2~3% of the cost of steel pipe, as long as the gas transmission capacity is increased by 1%, the cost can be quickly recovered.
第10题
当雷诺数≤2000时，流体的流动处在层流状态，管道的阻力只与雷诺数有关。When Reynolds number ≤2000, the fluid flow is in a stagnant state, and the resistance of the pipeline is only related to Reynolds number. 这是因为管壁上凹凸不平的地方都被平稳滑动着的流体层所掩盖，流体在此层上流过如同在光滑管上流过一样。This is because the bumps in the wall are covered by a layer of fluid that glides smoothly through it as it would through a smooth tube.
