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STUDY OF SUPERSONIC CAVITY FLOW IN ADVANCED VARIABLE GEOMETRY INLET

机译:进阶可变几何入口中超音速流的研究

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In this paper, a new concept concerning the effective use of conical cavity flow is presented. Because the flow over cavities may cause noise, oscillation, and resonance vibration, most of the researches focus on the negative effect of the cavity flow; however, there are also some studies concerning the effective use of cavities. For example, spike at nose of body is used as an aerodynamic device for drag reduction and/or thermal protection system of the vehicle. In 2003, we proposed an advanced aerodynamic device with conical cavities. This device, which is designated multi-row-disk (MRD), has a cone and some disks that are placed in the axial direction. Because flows over deep cavities formed between disks are stable, this structure can replace the solid structure without deteriorating aerodynamic performance of streamline objects. We continue the research on the MRD structure for applying to supersonic inlets or airplanes. In the first part of this paper, examination on the conical cavity flow is reported. In the second part, we show wind tunnel results of the supersonic inlet with the MRD structure.
机译:在本文中,提出了一种关于有效利用圆锥形腔流的新概念。由于腔内流动可能会引起噪声,振荡和共振振动,因此大多数研究集中在腔内流动的负面影响上。但是,也有一些关于有效利用型腔的研究。例如,在车身前部的尖峰被用作用于车辆的减阻和/或热保护系统的空气动力学装置。在2003年,我们提出了一种带有圆锥形空腔的先进空气动力学装置。该设备称为多行磁盘(MRD),具有一个圆锥体和一些沿轴向放置的磁盘。由于在磁盘之间形成的深腔上的流动是稳定的,因此该结构可以替代实体结构,而不会降低流线型物体的空气动力学性能。我们继续研究用于超音速进气口或飞机的MRD结构。在本文的第一部分中,报告了锥形腔流动的检查。在第二部分中,我们显示了具有MRD结构的超音速进气口的风洞结果。

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