摘要
本文阐述了在西安交大高压电加热水回路系统上所进行的φ32×3mm不锈钢管在α=14°和α=10°倾斜布置时的传热特性,试验参数为压力P=6～28MPa:内壁热负荷q=200～410kW/m^2;质量流速G=400～1400kg/m^2·s.试验得出了在上述参数范围内各工况的壁温分布曲线,从而可确定发生传热恶化的临界含汽率、最大壁温飞升值及其位置、内壁超温峰值及最小放热系数.管子上下壁温差等,为设计600MW超临界变压运行直流锅炉水冷壁系统提供可靠的依据.
The heat transter characteristics of σ32 × 3mm stainless steel tubes with an inclination of a=14° and a=10°, obtained in the Xi'an Jiaotong University's high pressure electricalliy heated loop rig, are elucidated. The testing parameters are as follows: pres sure 6 to 28 MPa, heat flux 200 to 400 kW/m2 and mass flow rate 400 to 1400 kg/m2 s-Critical steam content at heat transfer deteroration, surges of maximal tube wall tempera, ture and their locations, peak value of internal tube wall excess temperature and minimal heat transfer coefficient, wall temperature difference between up and lower tube-walls, etc. are determined with the help of tube wall temperature distributions obtained in the ranges as listed above under various conditions. These experimental results offer a reliable basis for designing the waterwall system of a 600MW supercritical sliding pressure once-through boiler. 9 figs, 2 tabls and 15 refs
出处
《动力工程》
CAS
CSCD
1991年第4期1-9,共9页
Power Engineering
