Investigation of a Sharp-Edged Delta Wing in a Supersonic Flow Using Stereo PIV

Mathijssen, Tiemo; Bannink, W.J.; Scarano, Fulvio

doi:10.2514/6.2009-3896

Cited by 3 publications

(5 citation statements)

References 10 publications

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“…No tracer particle in the area behind the capsule is detected, which is due to the inability of the particles to follow the curved path through the high-velocity and low-pressure region at the shoulder of the capsule [6]. The high curvature, high velocity and low pressure in this region contribute to the consistent Figure 1.…”

Section: Introductionmentioning

confidence: 75%

“…A PIV image of flow around a scaled model of a re-entry capsule in a Mach 7.5 flow is shown in figure 1(right). No tracer particle in the area behind the capsule is detected, which is due to the inability of the particles to follow the curved path through the high-velocity and low-pressure region at the shoulder of the capsule [6]. The high curvature, high velocity and low pressure in this region contribute to the consistent Visual evidence of the imposed limitation by tracer particles on PIV measurement in a vortex over a delta wing at Mach 2 [6] (left) and a capsule in hypersonic flow [14] (right).…”

Section: Introductionmentioning

confidence: 99%

“…However, the minimum particle size is limited by scattered light as it declines with the power 2 of the particle diameter for micron-sized particles (Mie scattering regime) and with the power 6 for sub-micron particles (Rayleigh scattering regime) [6]. A solution to this problem can be the use of non-compact particles such as porous, hollow or chain-type, which have a low effective density.…”

Section: Introductionmentioning

confidence: 99%

“…Altgeld et al [13] have developed a mechanism to disperse the powders placed on a rotating electrode disk using the pressure waves generated by an electric spark. However, measurements under the extreme high-speed conditions mentioned above demand particles of still smaller relaxation time [6,14].…”

Section: Introductionmentioning

confidence: 99%

“…The high curvature, high velocity and low pressure in this region contribute to the consistent Figure 1. Visual evidence of the imposed limitation by tracer particles on PIV measurement in a vortex over a delta wing at Mach 2 [6] (left) and a capsule in hypersonic flow [14] (right).…”

Section: Introductionmentioning

confidence: 99%

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Nanostructured tracers for laser-based diagnostics in high-speed flows

Ghaemi

Schmidt‐Ott

Scarano

2010

Meas. Sci. Technol.

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The potential application of aggregates of nanoparticles for high-speed flow diagnostics is investigated. Aluminum nanoparticles around 10 nm in diameter are produced by spark discharge in argon gas. Through rapid coagulation and oxidation, aggregates of small effective density are formed. They are characterized by microscopy and their aerodynamics and optical properties are theoretically evaluated. The performance of the aggregates is experimentally investigated across an oblique shock wave in a supersonic wind tunnel of 3 × 3 cm 2 cross-section at Mach 2. Particle image velocimetry is used to quantify the time response of the aggregates. The investigations are also carried out on compact titanium agglomerates to provide a base for comparison. The results yield a relaxation time of 0.27 μs for the nanostructured aluminum aggregates, which is an order of magnitude reduction with respect to the compact titanium nanoparticles. This work demonstrates the applicability of nanostructured aggregates for laser-based diagnostics in supersonic and hypersonic flows.

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Section: Introductionmentioning

confidence: 75%