INVESTIGATION OF TURBULENT SLOT IMPINGING JET USING LASER DOPPLER ANEMOMETRY METHOD-EXPERIMENTAL RESEARCH AND ERROR ANALYSIS

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CHARMIYAN MAHMOUD; AZIMIAN AHMAD REZA; SHIRANI EBRAHIM; ALOUI FETHI

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Journal: Modares Mechanical Engineering Year:2017 | Volume:17 | Issue:4 Page(s): 92-100

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Title

INVESTIGATION OF TURBULENT SLOT IMPINGING JET USING LASER DOPPLER ANEMOMETRY METHOD-EXPERIMENTAL RESEARCH AND ERROR ANALYSIS

Author(s)

CHARMIYAN MAHMOUD | AZIMIAN AHMAD REZA | SHIRANI EBRAHIM | ALOUI FETHI | Issue Writer Certificate

Keywords

LASER DOPPLER ANEMOMETRY (LDA)Q1

PARTICLE IMAGE VELOCIMETRY (PIV)Q1

TURBULENT IMPINGING JETQ1

RESIDENCE TIMEQ1

DATA SAMPLINGQ1

Abstract

In this paper, the results obtained from experimental measurements of average and turbulence quantities of a turbulent rectangular impinging jet hitting a fixed wall are reported using the laser doppler anemometry (LDA) method. The nozzle to plate distance is 10 times the nozzle width, and the tests are repeated for three different Reynolds numbers, namely Re=3000, 6000 and 9000. The aim of the current research was to investigate and compare flow in different Re and also to determine the two effective experimental errors on average velocities, namely DATA SAMPLING and RESIDENCE TIME in measurement volume. The results reveal that the previous stated correlation for prediction of the number of data required for ensuring independence of the average flow variables on the number of the sampled data is not sufficient by itself, and depending on the turbulence intensity of the flow, this correlation could become ineffective. Further, in the present study, the RESIDENCE TIME is used for calculation of average velocities, and the results are compared with those obtained by particle image velocimetry (PIV) method. The comparison shows good agreement between the results from LDA and PIV when considering effect of RESIDENCE TIME within the averaging equations in the former method. The results show that the behavior and quantity of the dimensionless average velocities for various Reynolds numbers are identical at most cross sections of the flow domain while the dimensionless turbulent stresses have different quantities at different values of the Reynolds number.

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APA: Copy

CHARMIYAN, MAHMOUD, AZIMIAN, AHMAD REZA, SHIRANI, EBRAHIM, & ALOUI, FETHI. (2017). INVESTIGATION OF TURBULENT SLOT IMPINGING JET USING LASER DOPPLER ANEMOMETRY METHOD-EXPERIMENTAL RESEARCH AND ERROR ANALYSIS. MODARES MECHANICAL ENGINEERING, 17(4 ), 92-100. SID. https://sid.ir/paper/178876/en

Vancouver: Copy

CHARMIYAN MAHMOUD, AZIMIAN AHMAD REZA, SHIRANI EBRAHIM, ALOUI FETHI. INVESTIGATION OF TURBULENT SLOT IMPINGING JET USING LASER DOPPLER ANEMOMETRY METHOD-EXPERIMENTAL RESEARCH AND ERROR ANALYSIS. MODARES MECHANICAL ENGINEERING[Internet]. 2017;17(4 ):92-100. Available from: https://sid.ir/paper/178876/en

IEEE: Copy

MAHMOUD CHARMIYAN, AHMAD REZA AZIMIAN, EBRAHIM SHIRANI, and FETHI ALOUI, “INVESTIGATION OF TURBULENT SLOT IMPINGING JET USING LASER DOPPLER ANEMOMETRY METHOD-EXPERIMENTAL RESEARCH AND ERROR ANALYSIS,” MODARES MECHANICAL ENGINEERING, vol. 17, no. 4 , pp. 92–100, 2017, [Online]. Available: https://sid.ir/paper/178876/en

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