大型风洞PIV粒子发生装置研制

示踪粒子量不足是制约大型风洞PIV试验的关键和难点问题,结合大型风洞的实际情况,通过原理设计、分析计算和试验验证,成功研制了基于加热蒸发原理的大流量粒子发生器,并应用到了大量的工程实践中;结果表明,在大型风洞PIV试验中,采用经济性好的油基材料加热蒸发的方式,可持续、足量、均匀地供应示踪粒子,是一种较好的粒子产生方式;另外,在粒子发生装置设计时,应充分考虑实际所需粒子流量,并针对选择的粒子材料的理化特性开展计算分析.

Development of PIV particle generator in large wind tunnel

The shortage of tracer particles is the key and difficult problem to restrict PIV test in large wind tunnel. Combined with the actual situation of large wind tunnel, through principle design, analysis and calculation and test verification, a large flow particle generator based on heating evaporation principle is successfully developed and applied to a large number of engineering practice. The results show that in the large-scale wind tunnel PIV test, it is a better way to produce particles by heating and evaporating oil-based materials with good economy and supplying tracer particles continuously, sufficiently and evenly. In addition, in the design of the particle generator, the actual particle flow rate should be fully considered, and the physical and chemical properties of the selected particle materials should be calculated and analyzed.