圆柱体涡流的脱落现象已发现多年,此种著名的涡流轨迹称之谓卡门涡流(Von Karman)。许多人曾对圆柱体引起的振动进行过研究。但是至今对横向流动的热交换器管束由于涡流脱落现象而产生的噪音仍然是一个问题。概括说来,管束间涡流的脱落都是在一定频率下产生的,而且与管子的节距和烟气流速有关。在一定的周围烟气的温度下,频率与波长有关。当产生频率的半波长或其倍数.等于二个平行面之间距离时,驻波便会不断地传播。这种驻波就是由于气柱和涡流脱落频率而造成的共振现象,它产生巨大的,有时甚至是振耳欲聋的声音,甚至可以把炉墙上的耐火材料和型板都振落下来。过去曾经发表过一些关于该特殊共振问题的文章[文献1～3]。文献3为1964年前美国燃烧工程公司的经验,其中有几点已经过修改。驻波在具有 Cylinder vortex shedding phenomenon has been found for many years, this famous vortex trajectory called Von Karman. Many people have studied the vibration caused by the cylinder. However, the noise generated by the eddy current shedding to the lateral flow tube bundle has so far remained a problem. In a nutshell, vortex shedding between tube bundles is generated at a certain frequency, and is related to the tube pitch and flue gas velocity. In a certain temperature around the flue gas, the frequency and wavelength. When a half-wavelength or multiple of the frequency is produced, the standing wave propagates continuously, equal to the distance between two parallel planes. This standing wave is a resonance caused by the frequency of gas columns and vortex shedding, which produces a large, sometimes deafening noise that can even shake down the refractory linings and plates on the furnace walls. In the past there have been some articles on this particular resonance issue [1 ~ 3]. Document 3 is the experience of American Burning Engineering Corporation before 1964, and several of these have been modified. Standing waves in having