STP1083

    Sensitivity Assessment of a Phase-Doppler Interferometer to User-Controlled Settings

    Published: Jan 1990


      Format Pages Price  
    PDF (344K) 20 $25   ADD TO CART
    Complete Source PDF (4.5M) 20 $78   ADD TO CART


    Abstract

    Commercially available phase-Doppler interferometers have become highly flexible. As a result, a wide range of user-controlled parameters are offered. The present study focuses upon the influence that such parameters can have upon measured quantities. Specifically, photomultiplier tube (PMT) voltage and frequency shift are examined in this context. Two flows are considered: (1) a turbulent free jet to assess velocity measurement and (2) a spray produced by an air blast atomizer to assess size and volume flux measurements. The results from the jet indicate that, in low turbulence flows, the fluctuating velocity is slightly influenced by the amount of frequency shift and strongly affected by excess PMT voltages. In the spray, it is observed that PMT voltage strongly affects volume flux measurements and number mean diameter, but has little effect on Sauter mean diameter. Finally, it is found that frequency shift slightly reduces the detectability of particles and thereby reduces the volume flux, but has little effect upon the measured size.

    Keywords:

    turbulent flow, atomization, sprays, particle size distribution, two-phase flow, Sauter mean diameter, volume flux, number mean diameter


    Author Information:

    McDonell, VG
    Research assistant and professor, UCI Combustion LaboratoryUniversity of California, Irvine, CA

    Samuelsen, S
    Research assistant and professor, UCI Combustion LaboratoryUniversity of California, Irvine, CA


    Paper ID: STP25420S

    Committee/Subcommittee: E29.03

    DOI: 10.1520/STP25420S


    CrossRef ASTM International is a member of CrossRef.