水力混合（hydraulic mixing)（名词解释)

， 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.

A.

B.

C.

D.

ary, if the gas contains water vapor, especially the presence of hydrogen sulfide, it will cause corrosion in the wall of the pipe, making the hydraulic friction coefficient gradually increase.

壁的磨光作用，使投产后的输气管的粗糙度和水力摩阻逐渐减小，输气能力增大。The gas transmission capacity and hydraulic friction coefficient of the delivery pipe change with time. If the dry gas does not contain hydrogen sulfide, the polishing effect of solid particles in the gas on the pipe wall will make the roughness and hydraulic friction of the delivery pipe gradually decrease and the gas transmission capacity increase after the production.

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

A、计算物性参数——水力计算的需要。Calculation of physical parameters - requirements for hydraulic calculation.

B、根据沿线温降曲线，分析凝析水和水合物可能形成的段落——判断水合物生成区域的需要。According to the temperature drop curve along the line, the possible stages of condensate water and hydrate formation are analyzed -- the need of hydrate formation area is determined.

C、为管线热应力计算和绝缘层选材设计提供依据——管道强度计算的需要。It provides the basis for calculation of thermal stress of pipeline and material selection design of insulation layer.

D、以上都不对