原帖由 tzy_nj 于 2009-8-25 12:39 发表
这两者的流速是不同的,因为一个取的是管内流速,一个取的是接管的流速,记得HTRI好象是管内,ASPEN是接管处。
ASPEN Help: The velocity distribution, between the inlet and outlet nozzle, is shown for reference. In other parts of the output, the velocity, which is shown for the shell side, is the diametric crossflow velocity. For the tube side it is the velocity through the tubes. For two phase applications, the velocities for crossflow, through baffle windows, and through tubes are the highest velocities based on the maximum vapor flow.
HTRI definition: middle point velocity through the tube
我想二者的定义概念应该是一致的,要不然怎么显示在"TEMA SHEET"的同样位置?还有搂主确定这个蒸发器是水平布置的? 通常直立的蒸发器更常见,且气液分离更容易。
我之所以说管内流速很关键是因为两个软件对于管内的流动以至传热模拟的不同。
并且公认的HETRAN对于2相流模拟可信度不高,这种情况 肯定不能取它的结果。
[ 本帖最后由 leemh 于 2009-8-27 10:19 编辑 ] |