Property measurement utilizing atomic/molecular filter-based diagnostics

Boguszko, Martin; Elliott, Gregory S.

doi:10.1016/j.paerosci.2005.03.001

Cited by 32 publications

(19 citation statements)

References 106 publications

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“…FRS was also used in reference [7], primarily for flow visualization purposes since the signal reaching the camera depends on both velocity and the density for high speed jets of the same gas, which was air in the reference. Many more recent details of experiments performed using the FRS technique, are contained in the excellent review article of reference [8] and a very recent application of FRS to large scale facilities where multiple species of gases are present is given in [9].…”

Section: Introductionmentioning

confidence: 99%

Filtered Rayleigh Scattering-Based Concentration Measurements for a Horizontal Buoyant Jet

McGaha

Reeder

2007

2007 22nd International Congress on Instrumentation in Aerospace Simulation Facilities

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Section: Introductionmentioning

confidence: 99%

Filtered Rayleigh Scattering-Based Concentration Measurements for a Horizontal Buoyant Jet

McGaha

Reeder

2007

2007 22nd International Congress on Instrumentation in Aerospace Simulation Facilities

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“…In 1983 Shimizu [19] proposed the use of an I 2 molecular filter as a narrowband, easy-to-use (compared to FabryPérot interferometer) blocking filter for LIDAR applications. Since then, judging by the numerous studies on the absorption lines of iodine [4][13] [20][21] [22][23], atomic/molecular filters have now become of common use for laser stabilization, background suppression as well as FRS applications. The absorption lines used with CW Argon ion lasers at 514:5 nm are around 19736 cm -1 (around 18788 cm -1 for Nd:YAG lasers).…”

Section: Iodine Cellmentioning

confidence: 99%

“…Doppler global velocimetry (DGV), also called planar Doppler velocimetry (PDV) [1][2] [3], or in some cases referred to filtered Rayleigh scattering velocimetry (FRS velocimetry) [4] [5], offers the advantage over one-point laser techniques of instantaneously giving hundreds of thousands of measurement points in a plane. The first works began in the 90's, almost simultaneously, by Komine et al [6] [7] and Miles et al [8].…”

Section: Introductionmentioning

confidence: 99%

Doppler global velocimeter — Development and validation with measurements in a round free jet

et al. 2009

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Doppler global velocimetry (DGV) has already been shown to be an interesting technique capable of measuring the three components of velocity in a plane. A 1-component DGV system is currently under development at the LMFA, using a stabilized continuous wave (CW) argon ion laser for emission. The receiver features only one camera for both signal and reference images and incorporates a DEFI system to adjust the incident laser light frequency and its transmission coefficient on the iodine cell absorption line. A description of the whole system is presented and a validation with measurements of axial velocities at several positions in a round free jet is proposed.

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“…A drawback is that time-resolved data is very challenging to acquire with a pulsed laser system. At least three comprehensive reviews 8,9,10 in the area of imaged filtered Rayleigh scattering exist in the literature. Recently, time-resolved Rayleigh scattering images have been collected by Sutton et al 11 Their unique laser system was developed to generate a series of high-repetition-rate pulse train with a narrow linewidth.…”

Section: Introductionmentioning

confidence: 99%

“…The regions shown in red are the signals that make it through to the detector. 10 A filter should have steep cut off edges and allow for an overlap of frequencies with the tunable laser in use. 10…”

Section: Introductionmentioning

confidence: 99%

Time Resolved Filtered Rayleigh Scattering Measurement of a Buoyant Jet In a Co-flow

Benhassen¹,

Polanka²,

Reeder³

2011

49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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The filtered Rayleigh scattering technique is implemented using a continuous wave laser in conjunction with a high speed camera and a molecular filter to obtain near field concentration measurements of a carbon dioxide jet in a co-flow of air with a sampling rate of 400 Hz. The beam from a 12-Watt Coherent Verdi laser was directed through the jet, of diameter ranging from 8.9 mm to 17.1 mm, at two streamwise stations, spaced about one diameter apart, and image sequences were collected with a Phantom high-speed camera for up to 20 seconds. In addition to the mean of the concentration and standard deviation of the scattered light intensity, space-time correlations of multiple points in the flow field are illustrated. The jet trajectory and mixing properties are investigated with and without the co-flow. The results demonstrate the significance the addition of the co-flow has on flattening the jet trajectory and increasing the mixing rate. The effects of various flow parameters such as the jet velocity, the jet-to-co-flow velocity ratio, the relative velocity between the jet and the co-flow, the Froude number, and the Reynolds number on the jet trajectory are studied. The results indicate that, within the range of test conditions, the velocity of the jet has the most significant effect on the jet trajectory. Furthermore, the investigation of the jet trajectory with respect to the Froude number highlighted the need to use a more robust Froude number definition that takes into account the effects of the addition of a co-flow in the flow field.

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Property measurement utilizing atomic/molecular filter-based diagnostics

Cited by 32 publications

References 106 publications

Filtered Rayleigh Scattering-Based Concentration Measurements for a Horizontal Buoyant Jet

Filtered Rayleigh Scattering-Based Concentration Measurements for a Horizontal Buoyant Jet

Doppler global velocimeter — Development and validation with measurements in a round free jet

Time Resolved Filtered Rayleigh Scattering Measurement of a Buoyant Jet In a Co-flow

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