缠绕管结构参数对管内压降的影响及压降模型

郭燕妮,杨遥,黄正梁,王靖岱,阳永荣

Pressure drop model and influence of structure parameters of helical coil on pressure drop in tube

Yan-ni GUO,Yao YANG,Zheng-liang HUANG,Jing-dai WANG,Yong-rong YANG

表 3 缠绕管内压降达到8500 Pa时的临界u、d/D、Re及Dn

Tab.3 Critical flow rate, d/D, Re and Dn of helical coil when pressure drop in helical coil reaches 8500 Pa

条件 u/(m·s−1) d/D Re Dn D=219，d=15.0，α=10° 1.3 0.068 19500 5103 D=273，d=15.0，α=10° 1.4 0.055 21000 5274 D=325，d=15.0，α=10° 1.5 0.046 22500 5156 D=325，d=15.0，α=5° 1.5 0.046 22500 4833 D=325，d=15.0，α=15° 1.5 0.046 22500 4833 D=325，d=10.8，α=10° 1.2 0.033 12960 2362