Patent ID: 6368061
Filing Date: 2002-04-09
Classification: F04D,Y10S

Abstract:
An axial flow fan for producing airflow through an engine compartment of a vehicle comprising:a hub rotatable about an axis; an annular band concentric with the hub and spaced radially outward from the hub; fan blades distributed circumferentially around the hub and extending radially from the hub to the annular band, wherein each blade has substantially the parameters defined by r&zgr;&thgr;&sgr;t&Lgr;â€”Deg.Deg.â€”%Deg.dH/dR0.3867.3925.840.818.0000.4669.0023.000.816.501.61âˆ’0.15060.5370.8019.000.795.501.31âˆ’0.10690.6172.0017.500.745.000.91âˆ’0.10690.6972.5016.000.664.80âˆ’0.69âˆ’0.10680.7772.2014.000.584.70âˆ’3.09âˆ’0.10700.8570.5016.300.494.75âˆ’7.59âˆ’0.10690.9369.5018.500.444.60âˆ’13.59âˆ’0.10691.0070.2019.800.444.10âˆ’17.29Wherein:r is the non-dimensional radius from the rotational axis, (r=R/Rtip with R being the radius from the rotational axis and Rtip being the radius from the rotational axis at the blade tip), &xgr; is the stagger angle of the blade at the radial distance r, &thgr; is the camber angle of the blade at the radial distance r, &sgr; is the solidity C/S, with C being chord length and S being the circumferential blade spacing at the radial distance r, t is the non-dimensional thickness of the blade at radius r (T/C where T is the blade thickness at R), &Lgr; is the skew angle of the blade at the radial distance r calculated at 30% chord where the skew at the hub radius is defined as zero skew, and dH/dR is the slope of the dihedral measured at r.