Shock-free supersonic elliptic nozzles and method of forming sam

Details Shock-free supersonic elliptic nozzles and method of forming sam Shock-free supersonic elliptic nozzles and method of forming sam

1995-03-22

1996-12-03

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Reaction motor discharge nozzle

244 53B, 60271, B63H 1100

Patent

active

055799990

ABSTRACT:
A method of forming a shock-free supersonic elliptic nozzle, in which the nozzle to be designed is divided into three sections, a circular-to-elliptic section which begins at a circular nozzle inlet, an elliptic subsonic section downstream from the circular-to-elliptic section and a supersonic section downstream from the elliptic subsonic section. The maximum and minimum radii for each axial point in the circular-to-elliptic section and the elliptic subsonic section are then separately determined, the maximum and minimum radii being the radii for the widest part of an elliptic cross-section and the narrowest part of the elliptic cross-section, respectively. The maximum and minimum radii for each axial point in the supersonic section are determined based on the Method of Characteristics, Then, each of the three sections are based on the maximum and minimum radii for each axial point in the section. The resulting nozzle is acoustically superior.

REFERENCES:
patent: 2546293 (1951-03-01), Berliner
patent: 2903851 (1959-09-01), Fiedler
patent: 3027713 (1962-04-01), Tyler et al.
patent: 3080711 (1963-03-01), Connors
patent: 3428257 (1969-02-01), Kentfield et al.
patent: 3443757 (1969-05-01), Townend
patent: 3570766 (1971-03-01), Johnson
patent: 3604628 (1971-09-01), Haynie, Jr.
patent: 4012166 (1977-03-01), Kaesser et al.

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