冲孔矩形翼涡流发生器的氧化镁颗粒污垢特性

Characteristics of Magnesia Particles Fouling of Punching Rectangular Wing Vortex Generator

为探讨冲孔矩形翼涡流发生器的颗粒污垢特性,选用粒径为50nm的氧化镁颗粒为研究对象,通过实验研究对比了冲孔涡流发生器和未冲孔涡流发生器的污垢和流动阻力特性,考察了孔径、孔数及孔位置对颗粒污垢特性的影响。结果表明:在相同的工况下,与未冲孔涡流发生器相比,冲孔涡流发生器具有良好的抑垢效果和较小的流动阻力损失;随着冲孔涡流发生器孔径的增大,污垢热阻渐近值降低,但降低的幅度变小;污垢热阻渐近值随着冲孔涡流发生器孔数的增加而降低,但是二者并不成同比例变化;冲孔位于外侧位置的涡流发生器的抑垢性能较优。

In order to study the particle characteristics of punching rectangular wing vortex generator, the diameter of 50nm Magnesium Oxide particles are used as the research object. The fouling and flow characteristics of the punching and non punching vortex generator were researched by comparative experiment, and the effect of the punch diameter, punch number and punch position on the particulate fouling characteristics were studied. The results show that in the same conditions, compared with non punching vortex generator, punching vortex generator has better inhibition scale and smaller loss of the flow resistance. With the increase,of the diameter of punching vortex generator, asymptotic value of fouling resistance decrease, but the amplitude of decrease is reduced. The more number of punching holes, the smaller asymptotic value of fouling resistance, but they are not in proportion to the change. When the punching holes locate outside position of vortex generator, they can gain a better ability in restrain fouling.