HIGH RECOVERY SONIC GAS VALVE - WOODWARD GOVERNOR CO

Title:

HIGH RECOVERY SONIC GAS VALVE

Document Type and Number:

Japanese Patent JP2005291201

Kind Code:

A

Abstract:

To provide a gas valve achieving sonic flow at lower pressure ratios than in conventional designs.

A high recovery sonic gas valve with the inlet flow entering transverse and orthogonal to the outlet flow is presented. The configuration cancels the effects of the inlet flow entering orthogonal to the axis of the nozzle and diffuser. An inlet passage is curved in a manner to let the flow enter along the centerline of the nozzle and diffuser. The nozzle is contoured and provides upstream flow impedance. The diffuser is contoured with the area gradient varying from a low positive value at the nozzle throat then to a maximum value and finally dropping off significantly to near zero prior to the nozzle exit. The diffuser is nearly cylindrical and may extend past a valve outlet flange and protrude into adjacent piping.

Inventors:

BRINKS BARRY T
GESSAMAN JEFF A
SUELTER BARRY

Application Number:

JP2005062534A

Publication Date:

October 20, 2005

Filing Date:

March 07, 2005

Export Citation:

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Assignee:

WOODWARD GOVERNOR CO

International Classes:

F01D25/00; F02C7/22; F02C7/232; F16K1/12; F16K1/38; F16K1/52; F16K47/02; G01F1/34; (IPC1-7): F02C7/232; F01D25/00; F02C7/22

Domestic Patent References:

JPS3822432B1
JPS6260770U	1987-04-15

Foreign References:

US4707278A	1987-11-17
US4413646A	1983-11-08

Attorney, Agent or Firm:

Sadaji Miyakawa
Tadao Naito
Kiyoshi Miyakawa
Hiroyuki Matsumura
Shigeo Shibata
Toshiyuki Kanai

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