Signal Generation in Laser Doppler and Phase Doppler Systems

Albrecht, H.-E.; Borys, Michael; Damaschke, Nils; Tropea, C.

doi:10.1007/978-3-662-05165-8_5

Cited by 5 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ϕ i is the scattering angle measured from the axis of the transmitting optics (the bisector of the two incident beams; the Z axis). ψ i is the azimuth angle giving the rotational position about the Z axis [9,10,20,22,47,49].…”

Section: Geometrical Factor For the Optical Parametersmentioning

confidence: 99%

“…The configuration of the transmitting and receiving optics in a PDA system also results in limitations for size measurement. Spatial non-uniformities (spatial displacement of beam intersection, waist mismatch in the measurement volume), variation in interference fringe distance of the refractive index, [18], high concentration of particles [19], practical misalignment of the transmitting beam and the receiving optics [9,[20][21][22] and changing the receiver aperture masks have also been studied. Furthermore, the set values of the signal processor for calculating the phase difference of scattered light from the droplet should be set for a specific application purpose.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of aviation fuel temperature on refractive index in droplet size measurement using phase Doppler anemometry

Dafsari¹,

Vashahi²,

Chandrahasan³

et al. 2019

Meas. Sci. Technol.

View full text Add to dashboard Cite

To accurately measure droplet size using a phase Doppler anemometry (PDA) system, many variables, such as the physical properties of the fuel and optical parameters of the PDA system, should be known, particularly the refractive index of liquid droplets, which is often underestimated. In this study, the effect of a refractive index change on droplet size measurements according to the fuel temperature was experimentally investigated in detail. Light, commercial aviation fuels were used as the working fluids, and a conventional PDA system (DANTEC Co.) was used as the droplet size measuring device. It was confirmed that the change in the refractive index with fuel temperature has a great influence on droplet size measurement. Through extensive experimental investigations, a method for calculating the refractive index according to the fuel temperature change is proposed here.

show abstract