Experimental Study on Aerodynamic Characteristics of Telescopic Aerospikes with Multiple Disks
Experimental Study on Aerodynamic Characteristics of Telescopic Aerospikes with Multiple Disks
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DOI：
10.2514/1.25250
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发表时间：
2007
影响因子：
1.6
通讯作者：
Hiroaki Kobayashi;Y. Maru;Katsuyoshi Fukiba
中科院分区：
文献类型：
--
作者：
Hiroaki Kobayashi;Y. Maru;Katsuyoshi Fukiba
本文报道了多圆盘伸缩式气动道钉的实验研究。伸缩式气塞是一种有用的空气动力控制装置;然而，改变其长度会引起嗡嗡声现象，许多研究人员已经报道过。嗡嗡声的发生可能对飞行器至关重要，因为它会在表面上带来严重的压力振荡。轴上的凹腔通过将单个分离流分成多个锥形凹腔流来产生稳定的回流区。因此，具有稳定盘的伸缩式气动道钉是有用的，而没有任何长度限制。利用风洞试验研究了伸缩式气动道钉的气动特性。再循环/再附着流动模式的转换的平原穗引起的阻力系数的大的变化。由于这种滞后现象，普通的道钉不适用于精细的气动控制装置。加装稳定盘对提高气动道钉的控制效果是有效的。
In this paper, experimental studies on telescopic aerospikes with multiple disks are reported. The telescopic aerospike is useful as an aerodynamic control device; however, changing its length causes a buzz phenomenon,which many researchers have reported. The occurrence of buzzing might be critical to the vehicle because it brings about severe pressure oscillations on the surface. Disks on the shaft produce stable recirculation regions by dividing the single separation flow into several conical cavity flows. Therefore, the telescopic aerospikes with stabilizer disks are useful without being any length constraints. Aerodynamic characteristics of the telescopic aerospikes were investigated using wind tunnel tests. Transition of recirculation/reattachment flow modes of a plain spike causes a large change in the drag coefficient. Because of this hysteresis phenomenon, the plain spike is unsuitable for fine aerodynamic control devices. Adding stabilizer disks is effective for the improved control of aerospikes.