凝汽器喉部的三维数值研究

Study on Three Dimension Values of Condenser Throat

采用SIMPLE算法和k-ε模型,对一凝汽器喉部建立数值模型。对低压加热器在凝汽器喉部不同布置方式、不同布置位置进行了三维的数值模拟,得到喉部流场的速度分布情况。表明无论低加在凝汽器喉部采取何种布置形式,都会对喉部流场的速度分布的不均匀性产生极大影响;在扩散角的影响下,低加横向布置速度流场的均匀性略优于纵向布置;在布置位置较低时,喉部出口流场较其布置在较高位置均匀,但通过改变低加布置高度对喉部流场的改善并不明显。

Based on simple algorithm and k-ε model, a numeric model of a condenser throat is set up. Proceeding the 3d numerical analogue of the L. P. H in the condenser throat in different forms and position, the distribution of the velocity has been obtained through the analogue. It indicates that whichever arrangement form of the L. P. H we take will extreamly affect the uniform of the distribution of velocity in the condenser throat; Under the effect of the angle of the flare, the uniform of the distribution of velocity arranged in cross direction is a little better than in longwise direction; the outlet flow field of the L. P. H in lower position is relatively better to the L. P. H in higher , but the improvement of the flow field is not apparent with the alteration of the arrange height of the L. P. H.