Piston for a high-enthalpy wind tunnel

Details Piston for a high-enthalpy wind tunnel Piston for a high-enthalpy wind tunnel

1989-01-25

1990-02-06

Woodiel, Donald O.

Measuring and testing

Wind tunnel: aerodynamic wing and propeller study

G01M 900

Patent

active

048980285

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.

REFERENCES:
patent: 3983749 (1976-10-01), Fletcher
patent: 4363237 (1982-12-01), Creel, Jr. et al.

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