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为了更好研究凝胶推进剂的雾化,采用时间分辨粒子图像测速(TR-PIV),研究了不同撞击角度(45°,60°,75°,90°和120°)和射流压差(0.4MPa~0.8MPa)对凝胶推进剂雾化速度的影响。实验结果表明:雾化液滴速度对于撞击轴线呈单峰对称分布,距离撞击点越远,雾化液滴速度越小且分布越均匀;增大撞击角和增大射流压差都可提高凝胶推进剂有效撞击速度,即增加撞击后液体动能转换液体破碎所需的能量,雾化质量提高;当有效撞击速度大于27.9m/s时,实验室配置的凝胶推进剂可充分雾化。
In order to better study the atomization of gel propellants, the effects of different impact angles (45 °, 60 °, 75 °, 90 ° and 120 °) and jet pressure difference 0.4MPa ~ 0.8MPa) on the atomization speed of the gel propellant. The experimental results show that the velocity of atomized droplet is monomodal and symmetrical with respect to the axis of impact, and the farther away from the point of impact, the smaller the atomized droplet velocity and the more uniform the distribution; the larger the impact angle and the larger the jet pressure, The effective impact velocity of the plastic propellant, that is, the energy required for the liquid kinetic energy to transform the liquid after the impact, improves the atomization quality; when the effective impact velocity is greater than 27.9 m / s, the gel propellant in the laboratory can be fully atomized.