Apparatus and method for reducing flow disturbances in a flowing

Details Apparatus and method for reducing flow disturbances in a flowing Apparatus and method for reducing flow disturbances in a flowing

1975-07-07

1978-12-19

Weldon, Ulysses

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181251, 181268, F01N 100, F01N 108

Patent

active

041301730

ABSTRACT:
Disclosed are methods and apparatus for reducing acoustic noise generated by high pressure ratio throttling of compressible fluids. High pressure gas is passed through a plurality of chokes, each adapted to cause an incremental pressure reduction and produce a normal shock at a Mach number between about 1.3 and 2.3, thereby reducing total pressure across the system without causing a high Mach number shock.

REFERENCES:
patent: 2169359 (1939-08-01), Jones et al.
patent: 3170483 (1965-02-01), Milroy
patent: 3448825 (1969-06-01), Booth
patent: 3458008 (1969-07-01), Benham
patent: 3491850 (1970-01-01), Heitner
patent: 3583417 (1971-06-01), Clark et al.
patent: 3665965 (1972-05-01), Baumann
NACA TN-3255.

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