喷油杆与凹腔支板稳定器近距匹配雾化特性

以水和煤油为雾化介质,采用马尔文激光粒度仪研究了来流马赫数为0.16~0.24、喷雾压差为0.30~0.90MPa、喷油杆与凹腔支板稳定器间隔为31.5mm且顺喷时液雾在轴向不同位置处的雾化特性.研究结果表明:液滴索太尔平均直径(SMD)随来流马赫数增大而减小,随喷雾压差升高而减小,但凹腔支板稳定器下游远方截面的液滴SMD在主流区对马赫数不敏感,在回流区对喷雾压差不敏感.此外,喷油杆下游液滴SMD沿轴向逐渐减小,沿径向在主流区逐渐增大,在回流区逐渐减小.

Atomization characteristics of fuel injector and cavity-based strut flame stabilizer under close-range matching condition

Malvern laser particle analyzer was used to study the atomization characteristics along the axial direction of fuel injector and cavity-based strut flame stabilizer under close-range matching condition, with stream Mach number of 0.16 to 0.24, spray pressure drop of 0.30MPa to 0.90MPa, distance of fuel injector and stabilizer up to 31.5mm and spray in the direction of stream flow with water and kerosene. The results show that the Sauter mean diameter(SMD) of liquid drop decreases with increasing stream Mach number and increasing spary pressure drop. But the SMD of liquid drop was not sensitive to spray pressure drop in recirculation zone and to Mach number in main stream zone at the far-field downstream position of cavity-based strut flame stabilizer. Furthermore, the SMD of liquid drop decreases gradually along the axial direction, and decreases gradually in recirculation zone but increased gradually in main stream zone along the radical direction.