渐开线雾化螺旋喷嘴的喷射型面几何模型

Research on Spray Surfaces Geometry Model of Spiral Nozzles with Involute Atomization

提出了一种具有渐开线雾化面的新型螺旋喷嘴。采用内外双圆锥的空心螺旋喷射型面,使设计的喷嘴体应力分布更均匀,克服了传统螺旋喷嘴的雾化面具有部分重叠过渡面的缺点。根据雾化平面的要求,对渐开线的首尾进行了优化处理。对螺旋角进行渐变设计,采用动坐标系向定坐标系映射的方法推导了喷射型面的空间几何模型,使用Matlab对设计的型面进行了仿真。结果验证了所提出几何模型的有效性,为螺旋喷嘴的设计和制造提供了理论依据。

A novel spiral nozzle with involute atomization surface was presented. The spray surface was design as inside and outside conic gradual change helix angle helicoids, which made the stress of the nozzle more uniform. Also it overcame the shortcomings of atomization overlap for traditional spiral nozzle. According to the requirements of involute atomization instead of homocentric circles atomization, the beginning and the end of the involute has been optimized. Then the dynamic and static coordinates were employed to deduce the space geometry model of spray helicoids. At last the model was simulated by using Matlab. The results validated the effectiveness of the proposed geometry model, which provided the theoretic basis for designing and manufacturing the spiral nozzles.