A combined holographic interferometer and laser-schlieren system applied to high temperature, high velocity flows

Kastell, D.; Eitelberg, G.

doi:10.1109/iciasf.1995.519118

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Holographic interferometry (HI) has been a useful technique for the study of flows generated in high enthalpy facilities (see, for example, Wegener et al 1996 andKastell et al 1996). A coherent beam of light is passed through the test section in the absence of any flow and is recorded holographically.…”

Section: Introductionmentioning

confidence: 99%

Near-resonant holographic interferometry of hypersonic flow

et al. 2001

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Near-Resonant Holographic Interferometry is a powerful technique which extends the established advantages of conventional holographic interferometry by allowing a species-specific number density to be determined. It has been tested in the harsh flow conditions generated in a high enthalpy facility yielding information about the shock shape on a cylindrical body and on the distribution of a trace species seeded into the flow.

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Section: Introductionmentioning

confidence: 99%

Near-resonant holographic interferometry of hypersonic flow

et al. 2001

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“…Among the techniques that can be employed for supersonic flow measurements, nonintrusive optically based techniques have received large attention due to their promising performances. Starting from qualitative techniques such as shadowgraphy and Schlieren methods [1], the experimental community has developed quantitative methods such as holographic interferometry [2,3], laser Doppler velocimetry [4,5], laser-induced fluorescence [6,7] and particle image velocimetry [8]. The present chapter gives a detailed discussion about the current status of PIV capabilities in supersonic and hypersonic wind-tunnel flows.…”

Section: Introductionmentioning

confidence: 99%

Overview of PIV in Supersonic Flows

Scarano

Topics in Applied Physics

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The extension of particle image velocimetry to supersonic and hypersonic wind-tunnel flows has been achieved in the last decade. This was mainly possible with the advent of short interframing-time CCD cameras with temporal resolution allowing to obtain correlated particle images at flow velocities exceeding 1000 m/s. The most challenging aspects of PIV experiments in supersonic flows are still recognized as the seeding-particle-selection and seeding-distribution techniques. Also, the optical access for illumination and imaging require a specific attention since pressurized facilities offer limited optical access. The presence of shock waves in supersonic flows introduces regions where particle tracers slip with respect to the surrounding flow. Moreover, the particle seeding density becomes strongly nonuniform and particle-image blur can occur as a result of the strong refractive index variations. The present chapter reviews the physical and technical problems of PIV experiments and discusses the potential of such techniques on the basis of recent experiments performed in high-speed wind tunnels: double compression ramp at Mach 7 and shock-wave turbulent boundary interaction at Mach 2.

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