Jet interaction at supersonic cross flow conditions
Jet interaction at supersonic cross flow conditions
复制标题
超音速横流条件下的射流相互作用
DOI：
10.1007/s00193-003-0189-y
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
R. Meuer
中科院分区：
文献类型：
--
作者：
F. Seiler;P. Gnemmi;H. Ende;M. Schwenzer;R. Meuer
由侧向喷流系统产生的推力已经成功地用于控制飞行轨迹几年，即，航天器在高层大气和轨道中的机动性。最近，这一技术也被应用于从海平面到10公里以上的低大气层中飞行的射弹和火箭。在ISL，已经用90毫米口径的全尺寸射弹进行了研究，以便研究飞行速度约为1500米/秒的特殊侧喷流控制系统，即，马赫数在1.5和7.5公里的高度。高能ISL激波风洞设施被用作地面试验设施，在该设施中，在完全复制的飞行条件下研究弹丸周围的流动。在试验设备中，弹丸固定在试验舱内，大气在弹丸试验模型周围流动。空气流在ISL激波风洞STB中产生，为此目的，该STB配备了出口侧长度为184 mm的发散方形喷嘴。通过在位于弹丸内部的燃烧室中燃烧固体推进剂来产生横向气体射流。粉末气体通过喷嘴横向喷出，通过横向射流与外部横流的相互作用产生复杂的流场。差分干涉法被用来可视化的外部流场的横向射流流出扭曲的行为。数值模拟已经进行了稳态计算的基础上使用的质量，动量和能量守恒方程。这样做是为了从理论上预测侧喷流影响下弹丸周围流场的发展。作为最终结果，作用在弹丸上的侧向力分别以力和力矩放大系数KF和KM给出。
The thrust produced by lateral jet systems has been successfully used for several years to control the flight trajectory, i.e., the maneuverability of spacecraft in the high atmosphere and in orbit. Recently this technology has also been applied to projectiles and rockets flying in the low atmosphere from sea level up to more than 10 km. At ISL, investigations have been performed with a 90 mm caliber full-scale projectile in order to study a special side jet controlling system at flight speeds of about 1500 m/s, i.e., Mach numberat altitudes of 1.5 and 7.5 km. The High Energy ISL Shock Tunnel facility is used as a ground testing facility in which the flow around the projectile is studied at fully duplicated flight conditions. In the test facility the projectile is fixed inside the test chamber and the atmospheric air is set in motion flowing around the projectile test model. The air flow is generated in the ISL Shock Tunnel STB which is equipped for this purpose with a divergent square nozzle with an exit side length of 184 mm. A lateral gas jet is produced by combusting a solid propellant in a combustion chamber, placed inside the projectile. The powder gases are blown out laterally via a nozzle, creating a complex flow field by the interaction of the lateral jet with the external cross flow. Differential interferometry is used to visualize the behavior of the external flow field distorted by the lateral jet outflow. Numerical simulations have been performed based on steady state computations using the conservation equations of mass, momentum and energy. This was done to theoretically predict the development of the flow field around the projectile under the influence of the side jet. As final result the lateral force acting on the projectile is given as force and moment amplification factors, KFand KMrespectively.