Supersonic Drag Reduction with Repetitive Laser Pulses Through a Blunt Body
Supersonic Drag Reduction with Repetitive Laser Pulses Through a Blunt Body
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DOI：
10.2514/1.j050174
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发表时间：
2009-06
期刊：
影响因子：
2.5
通讯作者：
A. Sasoh;Y. Sekiya;T. Sakai;Jae‐Hyung Kim;A. Matsuda
中科院分区：
文献类型：
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作者：
A. Sasoh;Y. Sekiya;T. Sakai;Jae‐Hyung Kim;A. Matsuda
在马赫数为1.92的风洞中，对激光脉冲重复照射下的平头圆柱绕流阻力进行了实验测量。使用在圆柱体的鼻部上制造的平凸透镜以高达10 kHz的重复频率和最大70 W的功率聚焦激光脉冲。使用低摩擦活塞测量阻力，该活塞由在受控压力下的腔中的测力传感器支撑。在实验条件下，减阻率可达3%，能量沉积效率约为10。通过实验流动显示和数值模拟分析了其减阻机理。
A drag over a flat-nosed cylinder with repetitive laser pulse irradiations ahead of it were experimentally measured in a Mach-1.92, in-draft wind tunnel. Laser pulses were focused using a plane-convex lens fabricated on the nose of the cylinder at a repetition frequency of up to 10 kHz and power of 70 W at a maximum. The drag was measured using a low-friction piston which was backed by a load cell in a cavity at a controlled pressure. Under the experimentally available operation conditions, an up-to-3 % drag reduction and an efficiency of energy deposition of about 10 were obtained. Mechanisms of the drag reduction are analyzed based on experimental flow visualization and numerical simulation.