Single- and dual-band collection toluene PLIF thermometry in supersonic flows

Miller, Victor A.; Gamba, Mirko; Mungal, M. G.; Hanson, Ronald K.

doi:10.1007/s00348-013-1539-x

Cited by 20 publications

(31 citation statements)

References 25 publications

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“…Luong et al 2006;Zimmermann et al 2006;Oehlschlaeger et al 2007;Strozzi et al 2009). More recently, Yoo et al (2010) extended applicability of singleband (or single-colour) toluene PLIF to shock tube studies, which was followed by further work by Miller et al (2013) on single-and double-band toluene PLIF temperature imaging in an expansion tube facility. The latter successful developments encouraged the present investigation.…”

Section: Toluene Plifmentioning

confidence: 98%

“…7, where the practically linear relation between temperature and PLIF ratio up to approximately 500 K can be observed for a number of filter combinations (e.g. Koban et al 2004;Miller et al 2013). For example, in the latter study by Miller et al (2013), the WG305 filter was chosen due to its wider spectral range (i.e.…”

Section: Figmentioning

confidence: 99%

“…Koban et al 2004;Miller et al 2013). For example, in the latter study by Miller et al (2013), the WG305 filter was chosen due to its wider spectral range (i.e. higher imaged intensity) and significant temperature sensitivity in combination with a BP280 filter.…”

Section: Figmentioning

confidence: 99%

“…Recent research has highlighted the potential of using toluene as a PLIF tracer for flow thermography applications given its strong temperature dependence (Koban et al 2004;Luong et al 2006;Yoo et al 2011;Miller et al 2013); however, one of the main related limitations is that the photo-physics of toluene fluorescence are only documented for a very narrow range of conditions. The present study aims at investigating the applicability of the toluene PLIF technique in hypersonic experimental research, for which temperature is a driving parameter, but yet the bulk of temperature measurements to date has been restricted to the surface of the model (Anderson 2000).…”

Section: Introductionmentioning

confidence: 99%

“…A number of PLIF variances have been applied in highspeed wind tunnel testing to date including OH PLIF-used for flow visualisation in a supersonic combustion facility (Johansen et al 2014), krypton PLIF-for scalar imaging in a supersonic underexpanded jet (Narayanaswamy et al 2011), acetone PLIF-for measuring density distribution within a supersonic free jet (Hatanaka et al 2012), and NO PLIF-for application in facilities where NO is naturally occurring such as in arc-heated tunnels (O'Byrne et al 2006;Inman et al 2011), amongst a few others. Recent research has highlighted the potential of using toluene as a PLIF tracer for flow thermography applications given its strong temperature dependence (Koban et al 2004;Luong et al 2006;Yoo et al 2011;Miller et al 2013); however, one of the main related limitations is that the photo-physics of toluene fluorescence are only documented for a very narrow range of conditions.…”

Section: Introductionmentioning

confidence: 99%

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Toluene-based planar laser-induced fluorescence imaging of temperature in hypersonic flows

et al. 2015

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Section: Toluene Plifmentioning

confidence: 98%

Section: Figmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Toluene-based planar laser-induced fluorescence imaging of temperature in hypersonic flows

et al. 2015

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20 kHz toluene planar laser-induced fluorescence imaging of a jet in nearly sonic crossflow

et al. 2014

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Temperature and number density measurement in non-uniform supersonic flowfields undergoing mixing using toluene PLIF thermometry

et al. 2015

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visualization and quantification of many flow properties, including scalar concentration and temperature measurements, and it has been long used in both low-and highspeed flows. PLIF imaging based on a variety of tracers has been considered through the literature [1]. Historically, acetone and 3-pentanone [2, 3] have been widely used for scalar and temperature imaging, and more recently, naphthalene [4,5], krypton [6], 1-methylnaphthalene [7], and anisole [8] have been utilized in a variety of applications.Toluene has been identified as a versatile candidate for PLIF studies owing to its large fluorescence quantum yield and strong temperature sensitivity [9][10][11][12][13]. Toluene PLIF has found many applications for the study of mixing, especially in internal combustion engine studies [10,12,[14][15][16][17] where the strong oxygen quenching [18] has been used to obtain a direct measurement of air/fuel ratio [1,12,19]. Some of the challenges (particularly related to pressure effects) on the use of toluene for fuel/air ratio measurements have also been identified [12,15,20,21]. The properties of oxygen quenching on fluorescence have also been exploited for a direct measure of oxygen concentration in both single-tracer [22] and dual-tracer [23] configurations. Furthermore, because of the relatively large fluorescence quantum yield, toluene PLIF has also been successfully used for high-framing-rate imaging configurations where laser pulse energies are typically limited [14,20,24].Toluene PLIF has proven to be a particularly robust approach for temperature measurements. Both singleand dual-band-detection schemes have been proposed [10, 13] and applied [16,[25][26][27][28][29]. Its use as a thermometry technique stems from the strong temperature dependence of the integrated fluorescence quantum yield and the temperature-induced red shift of the spectral fluorescence Abstract Single-excitation, dual-band-collection toluene planar laser-induced fluorescence (PLIF) is used to measure temperature and number density (or partial pressure) fields in non-uniform supersonic complex flows in the presence of mixing and compressibility. The study provides a quantitative evaluation of the technique in transverse jets in supersonic crossflow (JISCF). It is found that toluene PLIF is highly effective in visualizing the structure of supersonic flows and that temperature can be accurately inferred with acceptable signal-to-noise ratios (of order 30) even when mixing occurs. The technique was applied to several JISCFs that differ by jet fluid properties with resulting different structures. In the presence of compressibility and mixing, it is found that the PLIF signal is non-unique, a feature that is used to identify the mixing region of the transverse jet. Measurement errors due to camera registration errors have also been quantified. Because of the complexity of the flowfield, it is found that minute misalignment (<0.1 pixels) between the two PLIF images can introduce measurable errors on the order of tens of Kelvins and significa...

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Single- and dual-band collection toluene PLIF thermometry in supersonic flows

Cited by 20 publications

References 25 publications

Toluene-based planar laser-induced fluorescence imaging of temperature in hypersonic flows

Toluene-based planar laser-induced fluorescence imaging of temperature in hypersonic flows

20 kHz toluene planar laser-induced fluorescence imaging of a jet in nearly sonic crossflow

Temperature and number density measurement in non-uniform supersonic flowfields undergoing mixing using toluene PLIF thermometry

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