Comparison of PIV and PDA droplet velocity measurement techniques on two high-pressure water mist nozzles

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Comparison of PIV and PDA droplet velocity measurement techniques on two high-pressure water mist nozzles. / Husted, Bjarne; Petersson, Per; Lund, Ivar; Holmstedt, Göran.

In: Fire Safety Journal, Vol. 44, No. 8, 2009, p. 1030-1045.

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Husted, Bjarne ; Petersson, Per ; Lund, Ivar ; Holmstedt, Göran. / Comparison of PIV and PDA droplet velocity measurement techniques on two high-pressure water mist nozzles. In: Fire Safety Journal. 2009 ; Vol. 44, No. 8. pp. 1030-1045.

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TY - JOUR

T1 - Comparison of PIV and PDA droplet velocity measurement techniques on two high-pressure water mist nozzles

AU - Husted, Bjarne

AU - Petersson, Per

AU - Lund, Ivar

AU - Holmstedt, Göran

PY - 2009

Y1 - 2009

N2 - The need for reliable measurement of droplet velocities and droplet size has increased with the more widespread use of water mist systems. Two optical measuring techniques have been investigated, Particle Image Velocimetry (PIV) and phase Doppler anemometry (PDA). Measurements have been performed on two high-pressure nozzles, a hollow cone nozzle and a full cone nozzle. Both methods performed well close to the nozzle and further away from the nozzle. In the intermediate region the results obtained with PIV are biased against the larger droplets. The two methods complement each other, PIV giving the instantaneous velocity field and PDA giving both the droplet velocity and droplet size at a point. The measurement indicates that higher throw length can be archived with a full cone nozzle compared to the hollow cone nozzle, if both nozzles have the same cone angle and flow rate.

AB - The need for reliable measurement of droplet velocities and droplet size has increased with the more widespread use of water mist systems. Two optical measuring techniques have been investigated, Particle Image Velocimetry (PIV) and phase Doppler anemometry (PDA). Measurements have been performed on two high-pressure nozzles, a hollow cone nozzle and a full cone nozzle. Both methods performed well close to the nozzle and further away from the nozzle. In the intermediate region the results obtained with PIV are biased against the larger droplets. The two methods complement each other, PIV giving the instantaneous velocity field and PDA giving both the droplet velocity and droplet size at a point. The measurement indicates that higher throw length can be archived with a full cone nozzle compared to the hollow cone nozzle, if both nozzles have the same cone angle and flow rate.

KW - Water mist

KW - PIV

KW - PDA

KW - High-pressure nozzles

KW - Spray

KW - Measurements

U2 - 10.1016/j.firesaf.2009.07.003

DO - 10.1016/j.firesaf.2009.07.003

M3 - Article

VL - 44

SP - 1030

EP - 1045

JO - Fire Safety Journal

T2 - Fire Safety Journal

JF - Fire Safety Journal

SN - 0379-7112

IS - 8

ER -