The development of a 3-D laser velocimeter for the NASA Langley low turbulence pressure wind tunnelThe design of an orthogonal, three-dimensional laser velocimeter with in situ sizing (LVIS) system for a high-Reynolds-number facility, the NASA Langley low turbulence pressure wind tunnel (LTPT), is discussed. Special attention is paid to the laser velocimeter seeding subsystems, while all other subsystems are approached from the users standpoint. The evaluation of the LVIS system leads to the conclusion that seeding of large scale pressure wind tunnels remains a problem, while using the polydispersed seeding requires further investigation. A Cassegrain mirror receiver optics may be successfully implemented in lieu of similar lens systems. General agreement is observed between the mean velocity LVIS measurements as compared to conventional pitot and hot-wire data.
Document ID
19900051429
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Jones, Gregory S. (NASA Langley Research Center Hampton, VA, United States)
Adams, Wendell G. (NASA Langley Research Center Hampton, VA, United States)
Crespi, Pierre H. (NASA Langley Research Center Hampton, VA, United States)
Houser, Michael J. (NASA Langley Research Center Hampton, VA, United States)
Inenaga, Andrew S. (Aerometrics, Inc. Sunnyvale, CA, United States)