Piston for a high-enthalpy wind tunnel
US4898028A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1989 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Jan 25, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M9/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A piston is provided which serves to produce a pressure surge in a wind tunnel. Under the action of a gas pressure of at least 20 bars the piston is propelled in a first passage from an initial position to a target surface. Under the compression produced by the approaching piston, a diaphragm disposed at the end of the first passage is torn. The resulting pressure surge is transmitted in a second passage, which is filled with a testing gas, to a thin sheet. That thin sheet is torn so that the testing gas can enter a testing chamber as a supersonic shock wave. The piston is provided at its rear end with a locking extension, which cooperates with a stationary holder when the piston is in its initial position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.