## Semiempirical method of determining flow coefficients for pitot rake mass flow rate measurements |

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1.0 Reduced velocity 10-probe area-weighted rake ANNULAR AREA FRACTION annulus hub-to-tip radius constant for region CONTINUE DETERMINING FLOW COEFFICIENTS distance from origin dividing two equal DOUBLE PRECISION equal areas equation 11 Figure FLOU flow rate measurement Fortran fully developed function of annulus hub surface hub-to-tip radius ratio ideal flow rate Incompressible flow indicated flow rate inner radius integration constant Kn+lRt laminar viscosity Lewis Research Center m/sec mass flow rate measuring flow rate n+1 t n+1 no-slip boundary condition number of probes number of regions NUMBER OF TUBES NUMERICAL INTEGRATION Pa/m Performing Organization PITOT RAKE MASS probe placed radial direction radius dividing radius of region rake mass flow rakes are area ranged from 0.903 ratio for rakes ratio of turbulent region in semiempirical semiempirical method Semiempirical Velocity Profiles strong function summation of velocities tip surface total pressure turbulent flow turbulent to laminar turbulent velocity profiles Turbulent-to-laminar viscosity ratios velocity in z-direction