供热管道减阻涂层减阻效果的实验研究  

Experimental research on drag-reducing effect of drag-reducing coating in heating pipeline

作　　者：苗庆伟[1,2] 张欢 王淮[2] 赵惠中 常娅娜 刘秀清 刘洋 Miao Qingwei;Zhang Huan;Wang Huai;Zhao Huizhong;Chang Yana;Liu Xiuqing;Liu Yang(Tianjin University,Tianjin,China;不详)

机构地区：[1]天津大学 [2]中国市政工程华北设计研究总院有限公司 [3]天津建工集团建筑设计有限公司 [4]天津天地龙管业有限公司

出　　处：《暖通空调》2021年第11期72-76,共5页Heating Ventilating & Air Conditioning

摘　　要：对DN150管径的钢管内壁增加减阻涂层后,在流量为65 t/h,水温为20、25、30、35、40℃5种工况下进行了压降测试,得到87 m长有涂层管段的压降平均值为4.63 kPa,无涂层管段的压降平均值为9.63 kPa。根据实测压降推算得到,有涂层管段的当量绝对粗糙度约为0.01 mm,为CJJ 34—2010《城镇供热管网设计规范》规定的当量绝对粗糙度0.5 mm的1/50。和当量绝对粗糙度0.5 mm时的理论计算值相比,实验工况减阻涂层的减阻率达到42.22%。以DN1200大管径长输供热管道为例,在流量10000~16000 m^(3)/h,水温20、40℃工况下,计算得到有涂层管段的减阻率为32%~37%。After adding drag-reducing coating to the inner wall of the steel pipe with DN150 pipe diameter,conducts the pressure drop test under five working conditions with flow rate of 65 t/h and water temperature of 20,25,30,35,40℃,obtains that the mean pressure drop on the 87 m pipe with inner drag-reducing coating is 4.63 kPa,and the mean pressure drop on the 87 m pipe without inner drag-reducing coating is 9.63 kPa.Based on the actual pressure drop calculation,the equivalent absolute roughness of the coated pipe section is about 0.01 mm,which is 1/50 of the equivalent absolute roughness of 0.5 mm specified in CJJ 34-2010 Code for design of urban heating pipe networks.Compared with the theoretical calculation value when the equivalent absolute roughness is 0.5 mm,the drag-reducing rate of the drag-reducing coating under the experimental conditions reaches 42.22%.Taking the long-distance heat supply pipeline with a large diameter of DN1200 as an example,when the flow rate is 10000 to 16000 m^(3)/h and the water temperature is 20,40℃,the drag-reducing rate of the coated pipe section is calculated to be 32%to 37%.

关 键 词：供热管道 减阻涂层 当量绝对粗糙度 减阻率 实验研究 

分 类 号：TU995.3[建筑科学—供热、供燃气、通风及空调工程]