CAJ | 학술논문

在低质量流速下，对绝热水平布置的φ31.8 mm ×6.0 mm 西门子公司优化内螺纹管进行了高压汽水两相流摩擦压降特性试验研究；为进行比较，又对同规格的水平绝热光管的两相摩擦压降进行了测定。同时探讨超临界压力下优化内螺纹管摩擦压降特性。根据试验结果，得到了优化内螺纹管的两相摩擦压降倍率随压力、蒸汽干度和质量流速变化，分析超临界压力下优化内螺纹管的摩擦压降随质量流速、工质焓值和压力的变化。通过与水平光管比较发现：在高干度区，水平内螺纹管的两相摩擦压降倍率比水平光管有一明显得多的峰值存在。与亚临界压力下单相摩擦阻力系数相比，超临界压力下内螺纹管摩擦阻力系数的特点是在拟临界温度处摩擦阻力系数存在一个突跳变化，即存在一个峰值。
재저질량류속하，대절열수평포치적φ31.8 mm ×6.0 mm 서문자공사우화내라문관진행료고압기수량상류마찰압강특성시험연구；위진행비교，우대동규격적수평절열광관적량상마찰압강진행료측정。동시탐토초림계압력하우화내라문관마찰압강특성。근거시험결과，득도료우화내라문관적량상마찰압강배솔수압력、증기간도화질량류속변화，분석초림계압력하우화내라문관적마찰압강수질량류속、공질함치화압력적변화。통과여수평광관비교발현：재고간도구，수평내라문관적량상마찰압강배솔비수평광관유일명현득다적봉치존재。여아림계압력하단상마찰조력계수상비，초림계압력하내라문관마찰조력계수적특점시재의림계온도처마찰조력계수존재일개돌도변화，즉존재일개봉치。
At low mass fluxes, experimental investigation on the frictional pressure drops of high pressure steam water two-phase flows in an adiabatic horizontal Siemens AG optimized internally-ribbed tube with a diameter ofφ31.8 mm × 6.0 mm was carried out. The two-phase frictional pressure drops of an adiabatic horizontal smooth tube with a diameter ofφ31.8 mm × 6.0 mm were also measured under the same experimental conditions to provide a data base for comparison. In addition, the frictional pressure drops at supercritical pressures in the internally-ribbed tube were obtained. According to experimental data, the two-phase flow friction multiplier was calculated and its variations with the pressure, the mass flux and the steam quality were obtained. At supercritical pressures, the variations of the frictional pressure drops with the mass flux, the bulk enthalpy and the pressure were also analyzed. By comparison, it is found that the two-phase friction multiplier of the horizontal internally-ribbed tube has an obvious peak value, which is much larger than that of the horizontal smooth tube, in the region with high steam qualities. Comparing to the single-phase frictional factor at subcritical pressures, the characteristic of frictional factor at supercritical pressures is that there is a sudden change at the point of the pseudo-critical temperature, that is to say, there is a peak value.