Visualization of Hypersonic Flat-Plate Boundary Layer in Shock Tunnel

Qing-hu, Zhang; Yi, Shihe; Chen, Zhi; Zhu, Youhua; Yu, Wang

doi:10.1007/978-3-319-16835-7_80

Cited by 1 publication

(2 citation statements)

References 14 publications

(18 reference statements)

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“…Then, the first Fresnel radius F 1 is deduced as Figure 4. The image of the flat-plate boundary layer using nanoparticle-based planar laser scattering, which is the result given in Zhang et al (2015). Note that the dash lines are not included in the original picture, which are added for conveniently describing in this paper.…”

Section: Radio Sciencementioning

confidence: 99%

“…The smooth degree of the interfaces can be qualitatively displayed by simulating the supersonic airflow structure. Figure 4 is the result given in Zhang et al (2015), which aimed at investigating the transition process in supersonic turbulent area. Note that the dash lines are not included in the original figure and are added for conveniently illustrating in this paper.…”

Section: Radio Sciencementioning

confidence: 99%

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Neglected Radio Blackout Induced by the Nonionized Airflow Sheath Around a Supersonic Aircraft

et al. 2018

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The characteristics of the flow field around a supersonic aircraft are discussed. It is analyzed that there are interfaces between two adjacent regions with jump change of refractive index in the supersonic flow. The physical mechanism of the Fresnel reflection of an electromagnetic wave at the interfaces mentioned above is analyzed according to the Fresnel reflection phenomenon in the Earth atmosphere. The conditions for the Fresnel reflection in the supersonic flow field are discussed, and the formulae for calculating the Fresnel reflection coefficient are given. According to the process of a radio wave propagating across the interfaces in the supersonic flow field, the other radio blackout phenomenon is proposed for the first time, which is induced by the nonionized atmospheric sheath around a supersonic aircraft, and may be well neglected or mistaken for the plasma‐sheath‐caused radio blackout. The conditions of the nonionized‐atmospheric‐sheath‐induced radio blackout are investigated. The calculation results show that the neglected radio blackout is confined to a rather specific case, a very small range of grazing angles. However, it is significant for identifying the mechanism of radio blackout.

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Section: Radio Sciencementioning

confidence: 99%

Section: Radio Sciencementioning

confidence: 99%