摘要
运用计算流体力学(CFD)三维数值模拟方法比较了普通喷嘴结构和新型整流喷嘴结构对蒸汽喷射器操作性能的影响,并通过改变整流管长度和整流喷嘴出口位置,看其对喷射系数的影响。结果表明,在同等操作条件下,新型整流喷嘴结构能显著的提高蒸汽喷射器的喷射系数。并有一最佳整流管长度,在此长度下喷射系数可达最大。这种新型整流喷嘴结构可以有效地改善因工作流体的负荷降低而造成的喷射器操作性能降低,提高了设备运行的稳定性,节省了工作蒸气耗量。
This paper compares the influence of the normal nozzle structure and a new rectifying nozzle on the operating performance of the steam ejector by using CFD numerical simulation.After changing the length of the rectifying nozzle and the rectifying nozzle position,the influence on the ejector coefficient is analyzed.And the results indicate that the new rectifying nozzle structure can improve the ejector coefficient of the stream ejector efficiently under the same operating conditions.Meanwhile,there is an optimal length of the rectifying nozzle with which the ejector coefficient can reach the maximum.This new nozzle structure can efficiently improve the deterioration of the device operating performance resulted from the reduced load of the working fluid,promote the stability of the steam ejector and save the consumption of steam.
出处
《石油化工设备技术》
CAS
2014年第5期19-22,5-6,共4页
Petrochemical Equipment Technology
关键词
蒸汽喷射器
喷嘴
喷射系数
数值模拟
Stream ejector
Nozzle
Ejector coefficients
Numerical simulation
