Jet pump with stabilized mixing of primary and secondary flows
US4940392A · kind A · utility
7Cited by
7References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1989 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Jan 9, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04F5/463
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A jet pump comprises a nozzle (1) for a high speed primary flow, a mixing tube (2) into which the primary flow is directed by the nozzle (1), and an inlet (3) to the mixing tube (2) for a secondary flow, the inlet (3) surrounding the primary flow nozzle (1). Means (2') is provided for changing the cross section of the mixing tube (2) abruptly in order to produce a rise in static pressure immediately downstream, thereby increasing mixing of the primary and secondary flows, stabilizing the mixing process and enabling significant noise reduction when used in engine testing apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.