摘要:池塘养殖业在我国拥有悠久的历史，最早可以追溯到3000年前。但渔业机械在我国的发展是从上个世纪七十年代开始的。这些设备有效的解决了鱼塘增氧的问题，提高了渔民的产量。随着时代的进步，我们也愈来愈感觉到渔业机械的进步。

　　　水中的溶解氧气是鱼类赖以生存的最基本条件之一。现有的用于池塘增氧的增氧装置或多或少存在了一些问题缺陷。现有的增氧机增氧的速度和效率比较低下，并且还需要配备一些大型的设备，比较耗工耗时，消耗了大量的资源。

　　　这次的设计在于设计一种新型的自激振荡脉冲射流增氧机，克服现有的增氧机的一些弊端，节约能源。本次设计要求要确定自激振荡脉冲发生的条件，以及自激振荡腔室的建立，并且在理论分析的基础上，参照一些实验来确定自激振荡腔室的碰撞壁的结构形状及其尺寸及对自激振荡效果的影响，腔室其他的结构尺寸参数，讨论各结构尺寸的选用会对自激振荡的效果的影响。并在参考一般自激振荡脉冲增氧机的设计经验的基础上，确定了增氧机的其他部分的结构参数。本次设计的关键在于采用新型的自激振荡腔室代替传统增氧机的混合管（喉管），使吸入的空气和需要氧气的水流在腔室中产生自激振荡并且达到充分的搅拌、混合和充氧作用，使水体中的氧浓度达到饱和后再以脉冲的方式通过扩散管释放出去。

关键词 ：氧传质系数，剪切场，自激振荡，充氧性能，脉冲方式

ABSTRACT:Pond aquaculture has a long history in our country, the earliest can be traced back to 3000. But the fishery machinery in the development of our country starts from on century seventy's. The device effectively solves the problem of fishpond oxygen-increasing, improve the yield of fishermen. With the progress of the times, we have more and more feel the progress of fishery machinery

　　　Dissolved oxygen is one of the most basic conditions for fish survival. The available oxygen aerator ponds exist some defects. Oxygen aerator existing speed and low efficiency, and also need to be equipped with some large equipment, more time and labour, consumes a lot of resources

　　　Research topic of this is the design of a self-excited oscillation pulsed jet aerator model, overcome some disadvantages existing aerators, energy saving. The design requirements to determine the self-excited oscillation pulsed condition, and the establishment of the self-excited oscillation cavity, and on the basis of theoretical analysis, according to some experiment to determine the shape and size of the collision wall self-excited oscillation cavity and the influence of the self-excited oscillation effect, chamber structure size of other parameters, discusses the influence of the structure the size of the self-excited oscillation effect. Based on the design experience of general self-excited oscillation pulsed aerator on the other part, the structure parameters of the aerator. This design is the key of mixing tube using self-excited oscillation cavity model instead of the traditional aeration machine (throat), so that the suction air and oxygen water in the chamber produces self-excited oscillation to stirring, mixing and oxygenation adequately, the oxygen concentration in water up to saturation and then in a pulsed mode through the diffusion tube for release.

Keywords: overall oxygen transfer coefficient, the shear field, self-excited oscillation, oxygenation performance, pulse mode