A Study on Highly Turbulent Premixed Flames in a Cyclone-Jet Combustor. 3rd Report. Measurement of Turbulence Scale in Combustion Field by Slot-Correlation Method.

Yamamoto, Kazuhiro; Nishizawa, Yasuki; Onuma, Yoshiaki

doi:10.1299/kikaib.68.603

Cited by 4 publications

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“…Figure 6 shows the axial distribution of mean and RMS fluctuation velocities for U m = 30m/s in the image area (1). These results are obtained using 1000 cases for PIV measurement and 10 5 cases for LDV measurement [6,7]. Although good agreement is observed within Z = 60 mm in the mean It is considered that large errors could be included in PIV measurement.…”

Section: Errors In Piv Measurementmentioning

confidence: 95%

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PIV measurement and turbulence scale in turbulent combustion

Yamamoto¹,

Inoue²,

Yamashita³

et al. 2006

Heat Trans. Asian Res.

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We have investigated turbulent combustion by PIV (Particle Image Velocimetry) technique. Comparing with LDV data, the validity of PIV measurements has been confirmed. Particularly, the conditions of sampling number and spatial resolution have been shown to yield reliable data using PIV. Based on the velocity fields in cold flow and combustion, the interaction between flame and flow has been discussed. It was observed that the flow field is changed by combustion and the turbulence is reduced. In order to determine statistical quantities such as mean velocity and RMS of velocity fluctuation, a sampling number of 1000 is needed. Moreover, the velocity correlation coefficient was evaluated to obtain the integral length scale of the flow. For both cold flow and combustion, the PIV estimated scale is very close to that of LDV based on the assumption of Taylor's hypothesis. As a result, the spatial resolution in this study is about 6 times smaller than the integral length scale.

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Section: Errors In Piv Measurementmentioning

confidence: 95%

“…We have used a cyclone-jet combustor to form a stable flame, and have investigated turbulent premixed flames experimentally [4][5][6][7][8]. So far, we have obtained the turbulence scale by LDV using a Slot-Correlation method to examine the flow field and flame structure on the phase diagram.…”

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confidence: 99%

PIV measurement and turbulence scale in turbulent combustion

Yamamoto¹,

Inoue²,

Yamashita³

et al. 2006

Heat Trans. Asian Res.

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Numerical research of premixed combustion of diluted methane in a tubular flame burner

Gao

Zhao

Wang

et al. 2013

2013 International Conference on Materials for Renewable Energy and Environment

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Flow Field of Turbulent Premixed Combustion in a Cyclone-Jet Combustor

Yamamoto

Inoue

Yamashita

et al. 2007

JTST

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The flow field in highly turbulent premixed combustion has been examined, using a cyclone-jet combustor. The shear-strain rate is obtained by PIV system. Results show that, in combustion field, mean axial velocity does not decay along center axis and RMS fluctuation velocity is much lower, compared with those in cold flow. The reaction zone detected by an ion probe well corresponds to region of large shear-strain rate. In combustion, turbulence is small around reaction zone to have the undiminished jet velocity, which leads to an increase in length of potential core, although the flame generated turbulence is observed through flow expansion.

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A Study on Highly Turbulent Premixed Flames in a Cyclone-Jet Combustor. 3rd Report. Measurement of Turbulence Scale in Combustion Field by Slot-Correlation Method.

Cited by 4 publications

References 0 publications

PIV measurement and turbulence scale in turbulent combustion

PIV measurement and turbulence scale in turbulent combustion

Numerical research of premixed combustion of diluted methane in a tubular flame burner

Flow Field of Turbulent Premixed Combustion in a Cyclone-Jet Combustor

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