supersonic diffuser[¦sü·pər¦sän·ik di′fyü·zər]
A diffuser designed to reduce the velocity and to increase the pressure of fluid moving at supersonic velocities.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
i. External-compression inlets have the supersonic diffusion taking place at or ahead of the cowl lip or throat station and generally employ one or more oblique shock waves ahead of the normal shock.
ii. Internal-compression inlets accomplish supersonic diffusion internally downstream of the cowl lip. Deceleration of the flow is produced by a number of weak reflecting waves in a gradually convergent channel.
iii. A combination of external and internal compression, it is an effective compromise. It generally employs one or more oblique shock waves ahead of the normal shock.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved