在轴向气流作用下液体轴对称抛撒二次破碎的实验研究

液体轴对称抛撒的实验研究是以云雾爆轰武器的研制为背景的。为了研究轴向气流作用下液体轴对称抛撒二次破碎所形成的雾化场特性,本文利用两台激波管并对之加以改造,成功地在实验室实现了轴向气流作用下液体的轴对称抛撒。为了研究其雾化场的远场特性,本文利用激光粒子测量仪获得了在不同实验工况和不同位置下的雾化场SMD分布曲线。实验数据表明,由于轴向气流速度的增加,液体破碎的Weber数得到了提高,导致二次破碎初期雾化场的SMD随之减小;随着抛撒驱动压力的提高,二次破碎初期雾化场的SMD也随之减小;在同一工况下,雾化场SMD随着测量位置与喷口距离的增加而变大。

Experimental Study on the Secondary Breakup of Axisymmetrical Dissemination of Liquid in Axial Airflow

Laboratory researcies of axisymmetrical dissemination of liquid has important academic and technique significance for the development of FAE. The purpose of this paper is to study the atomization field of axisymmetrical dissemination of liquid under the action of axial airflow. With two shock tubes which are reformed, axisymmetrical dissemination of liquid under the action of axial airflow is achieved successful. In order to study the characters of atomization field, a laser scattering apparatus is used to obtain the distribution curves of SMD under different operating mode and different position. The experimental results confirm that with the increase of axial airflow velocity, the SMD of the early stage of secondary breakup decreased because of the increase of Weber number. With the increase of spray pressure, the SMD of the early stage of secondary breakup also decreased. And under the same operating mode, the SMD of atomization field increased with the increase of the distance of the measuring position to the spray nozzle.