Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Patent
1987-10-07
1988-12-13
Hershkovitz, Abraham
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Radial flow devices
416243, 416DIG2, B64C 1118
Patent
active
047907240
ABSTRACT:
The mean line (F) of each blade (1) is formed by a flat continuous curve contained in a plane OZ-OY.sub.o forming with the plane of rotation of the propeller an angle .phi..sub.o between 35.degree. and 55.degree. and preferably between 40.degree. and 50.degree., said curve having a first part of negative Y.sub.o and positive Z coordinates, and a second part of positive Y.sub.o and positive Z coordinates, the coordinate point Y.sub.o =0 being situated between the values of Z included between 0.75 and 0.85 R (R designating the radius of the propeller), the tangent to this curve has its end corresponding to the end of the blade forming with the axis Oz an angle between 30.degree. and 50.degree. and preferably between 35.degree. and 45.degree..
REFERENCES:
patent: 1658438 (1928-02-01), Hall
patent: 1929690 (1933-10-01), Huntman
patent: 2043736 (1936-06-01), Charavay
patent: 3972646 (1976-08-01), Brown et al.
patent: 4135858 (1979-01-01), Entat
patent: 4171183 (1979-10-01), Cornell et al.
patent: 4358246 (1982-11-01), Hanson et al.
patent: 4370097 (1983-01-01), Hanson et al.
Bousquet Jean-Marc
Faubert Alain
Vingut Georges
Hershkovitz Abraham
Office National d'Etudes et de Recherche Aerospatiales
Pitko Joseph M.
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