群体烟囱风压分布规律的数值模拟

Numerical simulation of wind pressure distribution of chimney groups

针对火力发电厂烟囱群之间的风干扰效应,应用数值风洞方法完成了任意风向角下烟囱静态风压分布的测定,并求解了风压分布系数。结果表明,相对于单个烟囱,由于烟囱群的风干涉效应导致烟囱群中风压分布异常复杂,具体表现为受扰烟囱风压极值的改变及正负风压分布区的偏移变化,为进一步研究烟囱群风荷载相互干扰对体型系数的影响及改变打下了基础.

According to the interference effect between chimneys in power plants, the staticforces of wind applied on the chimneys in different directional angles were measured with application of numerical wind tunnel methods. The results show that the pressure distributions are very complicated due to the serious interference among chimneys, i.e. the extreme wind pressure of chimney is changed and the wind pressure distribution offset. The study results lay a basis for the further study of shape coefficient under the influ- ence of the chimney groups spacing and wind angles.